Selective modal control of blade vibrations by local laser shock peening
The main purpose of this study is to explore the selective modal control of blade vibrations using laser shock peening (LSP) for the mode shapes with stretching of the mid-plane, which are commonly encountered in some local zones of the higher-order mode shapes. The zones with stretching of the mid-...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Liu, Jingyuan [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2019transfer abstract |
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| Schlagwörter: |
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| Umfang: |
15 |
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| Übergeordnetes Werk: |
Enthalten in: Cancer of the uterus and treatment of incontinence (CUTI) - Robison, K.M. ELSEVIER, 2015, London |
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| Übergeordnetes Werk: |
volume:445 ; year:2019 ; day:14 ; month:04 ; pages:2-16 ; extent:15 |
| Links: |
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| DOI / URN: |
10.1016/j.jsv.2018.12.035 |
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ELV045710619 |
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| 245 | 1 | 0 | |a Selective modal control of blade vibrations by local laser shock peening |
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| 520 | |a The main purpose of this study is to explore the selective modal control of blade vibrations using laser shock peening (LSP) for the mode shapes with stretching of the mid-plane, which are commonly encountered in some local zones of the higher-order mode shapes. The zones with stretching of the mid-plane are selected for LSP, which leads to residual stresses and grain refinement, in order to control the corresponding mode. A kind of diamond-shaped specimen is chosen as the object of the study to simulate the actual blade. First, theoretical measurements and the finite element method are used to analyze the mechanism of selective modal control. The effects of LSP in different selected zones on modal stiffness and damping are compared, and the selective modal control is simulated. Then, an excitation test was conducted; the experimental results are in good agreement with the simulation, which effectively proves the correctness of the analysis. As the amplitude of the excitation increases, the vibration shows a significant nonlinearity. At this time, the blades treated by LSP show an unusual jump phenomenon, which limits the vibration amplitude in a smaller range. A further experimental analysis is performed for the interpretation of this phenomenon. Based on the above results, it is proved that the local LSP can effectively control the vibration of a certain mode, which provides a more flexible method for blade design, especially for improved design of the blade after styling. | ||
| 520 | |a The main purpose of this study is to explore the selective modal control of blade vibrations using laser shock peening (LSP) for the mode shapes with stretching of the mid-plane, which are commonly encountered in some local zones of the higher-order mode shapes. The zones with stretching of the mid-plane are selected for LSP, which leads to residual stresses and grain refinement, in order to control the corresponding mode. A kind of diamond-shaped specimen is chosen as the object of the study to simulate the actual blade. First, theoretical measurements and the finite element method are used to analyze the mechanism of selective modal control. The effects of LSP in different selected zones on modal stiffness and damping are compared, and the selective modal control is simulated. Then, an excitation test was conducted; the experimental results are in good agreement with the simulation, which effectively proves the correctness of the analysis. As the amplitude of the excitation increases, the vibration shows a significant nonlinearity. At this time, the blades treated by LSP show an unusual jump phenomenon, which limits the vibration amplitude in a smaller range. A further experimental analysis is performed for the interpretation of this phenomenon. Based on the above results, it is proved that the local LSP can effectively control the vibration of a certain mode, which provides a more flexible method for blade design, especially for improved design of the blade after styling. | ||
| 650 | 7 | |a Nonlinear dynamics |2 Elsevier | |
| 650 | 7 | |a Laser shock peening |2 Elsevier | |
| 650 | 7 | |a Vibration |2 Elsevier | |
| 650 | 7 | |a Modal stiffness |2 Elsevier | |
| 650 | 7 | |a Modal damping |2 Elsevier | |
| 700 | 1 | |a Cheng, Li |4 oth | |
| 700 | 1 | |a Li, Silu |4 oth | |
| 700 | 1 | |a He, Weifeng |4 oth | |
| 700 | 1 | |a Lu, Kaijv |4 oth | |
| 773 | 0 | 8 | |i Enthalten in |n Academic Press |a Robison, K.M. ELSEVIER |t Cancer of the uterus and treatment of incontinence (CUTI) |d 2015 |g London |w (DE-627)ELV012704822 |
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10.1016/j.jsv.2018.12.035 doi GBV00000000000513.pica (DE-627)ELV045710619 (ELSEVIER)S0022-460X(18)30861-7 DE-627 ger DE-627 rakwb eng 610 VZ 610 VZ 44.11 bkl Liu, Jingyuan verfasserin aut Selective modal control of blade vibrations by local laser shock peening 2019transfer abstract 15 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The main purpose of this study is to explore the selective modal control of blade vibrations using laser shock peening (LSP) for the mode shapes with stretching of the mid-plane, which are commonly encountered in some local zones of the higher-order mode shapes. The zones with stretching of the mid-plane are selected for LSP, which leads to residual stresses and grain refinement, in order to control the corresponding mode. A kind of diamond-shaped specimen is chosen as the object of the study to simulate the actual blade. First, theoretical measurements and the finite element method are used to analyze the mechanism of selective modal control. The effects of LSP in different selected zones on modal stiffness and damping are compared, and the selective modal control is simulated. Then, an excitation test was conducted; the experimental results are in good agreement with the simulation, which effectively proves the correctness of the analysis. As the amplitude of the excitation increases, the vibration shows a significant nonlinearity. At this time, the blades treated by LSP show an unusual jump phenomenon, which limits the vibration amplitude in a smaller range. A further experimental analysis is performed for the interpretation of this phenomenon. Based on the above results, it is proved that the local LSP can effectively control the vibration of a certain mode, which provides a more flexible method for blade design, especially for improved design of the blade after styling. The main purpose of this study is to explore the selective modal control of blade vibrations using laser shock peening (LSP) for the mode shapes with stretching of the mid-plane, which are commonly encountered in some local zones of the higher-order mode shapes. The zones with stretching of the mid-plane are selected for LSP, which leads to residual stresses and grain refinement, in order to control the corresponding mode. A kind of diamond-shaped specimen is chosen as the object of the study to simulate the actual blade. First, theoretical measurements and the finite element method are used to analyze the mechanism of selective modal control. The effects of LSP in different selected zones on modal stiffness and damping are compared, and the selective modal control is simulated. Then, an excitation test was conducted; the experimental results are in good agreement with the simulation, which effectively proves the correctness of the analysis. As the amplitude of the excitation increases, the vibration shows a significant nonlinearity. At this time, the blades treated by LSP show an unusual jump phenomenon, which limits the vibration amplitude in a smaller range. A further experimental analysis is performed for the interpretation of this phenomenon. Based on the above results, it is proved that the local LSP can effectively control the vibration of a certain mode, which provides a more flexible method for blade design, especially for improved design of the blade after styling. Nonlinear dynamics Elsevier Laser shock peening Elsevier Vibration Elsevier Modal stiffness Elsevier Modal damping Elsevier Cheng, Li oth Li, Silu oth He, Weifeng oth Lu, Kaijv oth Enthalten in Academic Press Robison, K.M. ELSEVIER Cancer of the uterus and treatment of incontinence (CUTI) 2015 London (DE-627)ELV012704822 volume:445 year:2019 day:14 month:04 pages:2-16 extent:15 https://doi.org/10.1016/j.jsv.2018.12.035 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_20 GBV_ILN_30 GBV_ILN_40 44.11 Präventivmedizin VZ AR 445 2019 14 0414 2-16 15 |
| spelling |
10.1016/j.jsv.2018.12.035 doi GBV00000000000513.pica (DE-627)ELV045710619 (ELSEVIER)S0022-460X(18)30861-7 DE-627 ger DE-627 rakwb eng 610 VZ 610 VZ 44.11 bkl Liu, Jingyuan verfasserin aut Selective modal control of blade vibrations by local laser shock peening 2019transfer abstract 15 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The main purpose of this study is to explore the selective modal control of blade vibrations using laser shock peening (LSP) for the mode shapes with stretching of the mid-plane, which are commonly encountered in some local zones of the higher-order mode shapes. The zones with stretching of the mid-plane are selected for LSP, which leads to residual stresses and grain refinement, in order to control the corresponding mode. A kind of diamond-shaped specimen is chosen as the object of the study to simulate the actual blade. First, theoretical measurements and the finite element method are used to analyze the mechanism of selective modal control. The effects of LSP in different selected zones on modal stiffness and damping are compared, and the selective modal control is simulated. Then, an excitation test was conducted; the experimental results are in good agreement with the simulation, which effectively proves the correctness of the analysis. As the amplitude of the excitation increases, the vibration shows a significant nonlinearity. At this time, the blades treated by LSP show an unusual jump phenomenon, which limits the vibration amplitude in a smaller range. A further experimental analysis is performed for the interpretation of this phenomenon. Based on the above results, it is proved that the local LSP can effectively control the vibration of a certain mode, which provides a more flexible method for blade design, especially for improved design of the blade after styling. The main purpose of this study is to explore the selective modal control of blade vibrations using laser shock peening (LSP) for the mode shapes with stretching of the mid-plane, which are commonly encountered in some local zones of the higher-order mode shapes. The zones with stretching of the mid-plane are selected for LSP, which leads to residual stresses and grain refinement, in order to control the corresponding mode. A kind of diamond-shaped specimen is chosen as the object of the study to simulate the actual blade. First, theoretical measurements and the finite element method are used to analyze the mechanism of selective modal control. The effects of LSP in different selected zones on modal stiffness and damping are compared, and the selective modal control is simulated. Then, an excitation test was conducted; the experimental results are in good agreement with the simulation, which effectively proves the correctness of the analysis. As the amplitude of the excitation increases, the vibration shows a significant nonlinearity. At this time, the blades treated by LSP show an unusual jump phenomenon, which limits the vibration amplitude in a smaller range. A further experimental analysis is performed for the interpretation of this phenomenon. Based on the above results, it is proved that the local LSP can effectively control the vibration of a certain mode, which provides a more flexible method for blade design, especially for improved design of the blade after styling. Nonlinear dynamics Elsevier Laser shock peening Elsevier Vibration Elsevier Modal stiffness Elsevier Modal damping Elsevier Cheng, Li oth Li, Silu oth He, Weifeng oth Lu, Kaijv oth Enthalten in Academic Press Robison, K.M. ELSEVIER Cancer of the uterus and treatment of incontinence (CUTI) 2015 London (DE-627)ELV012704822 volume:445 year:2019 day:14 month:04 pages:2-16 extent:15 https://doi.org/10.1016/j.jsv.2018.12.035 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_20 GBV_ILN_30 GBV_ILN_40 44.11 Präventivmedizin VZ AR 445 2019 14 0414 2-16 15 |
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10.1016/j.jsv.2018.12.035 doi GBV00000000000513.pica (DE-627)ELV045710619 (ELSEVIER)S0022-460X(18)30861-7 DE-627 ger DE-627 rakwb eng 610 VZ 610 VZ 44.11 bkl Liu, Jingyuan verfasserin aut Selective modal control of blade vibrations by local laser shock peening 2019transfer abstract 15 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The main purpose of this study is to explore the selective modal control of blade vibrations using laser shock peening (LSP) for the mode shapes with stretching of the mid-plane, which are commonly encountered in some local zones of the higher-order mode shapes. The zones with stretching of the mid-plane are selected for LSP, which leads to residual stresses and grain refinement, in order to control the corresponding mode. A kind of diamond-shaped specimen is chosen as the object of the study to simulate the actual blade. First, theoretical measurements and the finite element method are used to analyze the mechanism of selective modal control. The effects of LSP in different selected zones on modal stiffness and damping are compared, and the selective modal control is simulated. Then, an excitation test was conducted; the experimental results are in good agreement with the simulation, which effectively proves the correctness of the analysis. As the amplitude of the excitation increases, the vibration shows a significant nonlinearity. At this time, the blades treated by LSP show an unusual jump phenomenon, which limits the vibration amplitude in a smaller range. A further experimental analysis is performed for the interpretation of this phenomenon. Based on the above results, it is proved that the local LSP can effectively control the vibration of a certain mode, which provides a more flexible method for blade design, especially for improved design of the blade after styling. The main purpose of this study is to explore the selective modal control of blade vibrations using laser shock peening (LSP) for the mode shapes with stretching of the mid-plane, which are commonly encountered in some local zones of the higher-order mode shapes. The zones with stretching of the mid-plane are selected for LSP, which leads to residual stresses and grain refinement, in order to control the corresponding mode. A kind of diamond-shaped specimen is chosen as the object of the study to simulate the actual blade. First, theoretical measurements and the finite element method are used to analyze the mechanism of selective modal control. The effects of LSP in different selected zones on modal stiffness and damping are compared, and the selective modal control is simulated. Then, an excitation test was conducted; the experimental results are in good agreement with the simulation, which effectively proves the correctness of the analysis. As the amplitude of the excitation increases, the vibration shows a significant nonlinearity. At this time, the blades treated by LSP show an unusual jump phenomenon, which limits the vibration amplitude in a smaller range. A further experimental analysis is performed for the interpretation of this phenomenon. Based on the above results, it is proved that the local LSP can effectively control the vibration of a certain mode, which provides a more flexible method for blade design, especially for improved design of the blade after styling. Nonlinear dynamics Elsevier Laser shock peening Elsevier Vibration Elsevier Modal stiffness Elsevier Modal damping Elsevier Cheng, Li oth Li, Silu oth He, Weifeng oth Lu, Kaijv oth Enthalten in Academic Press Robison, K.M. ELSEVIER Cancer of the uterus and treatment of incontinence (CUTI) 2015 London (DE-627)ELV012704822 volume:445 year:2019 day:14 month:04 pages:2-16 extent:15 https://doi.org/10.1016/j.jsv.2018.12.035 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_20 GBV_ILN_30 GBV_ILN_40 44.11 Präventivmedizin VZ AR 445 2019 14 0414 2-16 15 |
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10.1016/j.jsv.2018.12.035 doi GBV00000000000513.pica (DE-627)ELV045710619 (ELSEVIER)S0022-460X(18)30861-7 DE-627 ger DE-627 rakwb eng 610 VZ 610 VZ 44.11 bkl Liu, Jingyuan verfasserin aut Selective modal control of blade vibrations by local laser shock peening 2019transfer abstract 15 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The main purpose of this study is to explore the selective modal control of blade vibrations using laser shock peening (LSP) for the mode shapes with stretching of the mid-plane, which are commonly encountered in some local zones of the higher-order mode shapes. The zones with stretching of the mid-plane are selected for LSP, which leads to residual stresses and grain refinement, in order to control the corresponding mode. A kind of diamond-shaped specimen is chosen as the object of the study to simulate the actual blade. First, theoretical measurements and the finite element method are used to analyze the mechanism of selective modal control. The effects of LSP in different selected zones on modal stiffness and damping are compared, and the selective modal control is simulated. Then, an excitation test was conducted; the experimental results are in good agreement with the simulation, which effectively proves the correctness of the analysis. As the amplitude of the excitation increases, the vibration shows a significant nonlinearity. At this time, the blades treated by LSP show an unusual jump phenomenon, which limits the vibration amplitude in a smaller range. A further experimental analysis is performed for the interpretation of this phenomenon. Based on the above results, it is proved that the local LSP can effectively control the vibration of a certain mode, which provides a more flexible method for blade design, especially for improved design of the blade after styling. The main purpose of this study is to explore the selective modal control of blade vibrations using laser shock peening (LSP) for the mode shapes with stretching of the mid-plane, which are commonly encountered in some local zones of the higher-order mode shapes. The zones with stretching of the mid-plane are selected for LSP, which leads to residual stresses and grain refinement, in order to control the corresponding mode. A kind of diamond-shaped specimen is chosen as the object of the study to simulate the actual blade. First, theoretical measurements and the finite element method are used to analyze the mechanism of selective modal control. The effects of LSP in different selected zones on modal stiffness and damping are compared, and the selective modal control is simulated. Then, an excitation test was conducted; the experimental results are in good agreement with the simulation, which effectively proves the correctness of the analysis. As the amplitude of the excitation increases, the vibration shows a significant nonlinearity. At this time, the blades treated by LSP show an unusual jump phenomenon, which limits the vibration amplitude in a smaller range. A further experimental analysis is performed for the interpretation of this phenomenon. Based on the above results, it is proved that the local LSP can effectively control the vibration of a certain mode, which provides a more flexible method for blade design, especially for improved design of the blade after styling. Nonlinear dynamics Elsevier Laser shock peening Elsevier Vibration Elsevier Modal stiffness Elsevier Modal damping Elsevier Cheng, Li oth Li, Silu oth He, Weifeng oth Lu, Kaijv oth Enthalten in Academic Press Robison, K.M. ELSEVIER Cancer of the uterus and treatment of incontinence (CUTI) 2015 London (DE-627)ELV012704822 volume:445 year:2019 day:14 month:04 pages:2-16 extent:15 https://doi.org/10.1016/j.jsv.2018.12.035 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_20 GBV_ILN_30 GBV_ILN_40 44.11 Präventivmedizin VZ AR 445 2019 14 0414 2-16 15 |
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10.1016/j.jsv.2018.12.035 doi GBV00000000000513.pica (DE-627)ELV045710619 (ELSEVIER)S0022-460X(18)30861-7 DE-627 ger DE-627 rakwb eng 610 VZ 610 VZ 44.11 bkl Liu, Jingyuan verfasserin aut Selective modal control of blade vibrations by local laser shock peening 2019transfer abstract 15 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The main purpose of this study is to explore the selective modal control of blade vibrations using laser shock peening (LSP) for the mode shapes with stretching of the mid-plane, which are commonly encountered in some local zones of the higher-order mode shapes. The zones with stretching of the mid-plane are selected for LSP, which leads to residual stresses and grain refinement, in order to control the corresponding mode. A kind of diamond-shaped specimen is chosen as the object of the study to simulate the actual blade. First, theoretical measurements and the finite element method are used to analyze the mechanism of selective modal control. The effects of LSP in different selected zones on modal stiffness and damping are compared, and the selective modal control is simulated. Then, an excitation test was conducted; the experimental results are in good agreement with the simulation, which effectively proves the correctness of the analysis. As the amplitude of the excitation increases, the vibration shows a significant nonlinearity. At this time, the blades treated by LSP show an unusual jump phenomenon, which limits the vibration amplitude in a smaller range. A further experimental analysis is performed for the interpretation of this phenomenon. Based on the above results, it is proved that the local LSP can effectively control the vibration of a certain mode, which provides a more flexible method for blade design, especially for improved design of the blade after styling. The main purpose of this study is to explore the selective modal control of blade vibrations using laser shock peening (LSP) for the mode shapes with stretching of the mid-plane, which are commonly encountered in some local zones of the higher-order mode shapes. The zones with stretching of the mid-plane are selected for LSP, which leads to residual stresses and grain refinement, in order to control the corresponding mode. A kind of diamond-shaped specimen is chosen as the object of the study to simulate the actual blade. First, theoretical measurements and the finite element method are used to analyze the mechanism of selective modal control. The effects of LSP in different selected zones on modal stiffness and damping are compared, and the selective modal control is simulated. Then, an excitation test was conducted; the experimental results are in good agreement with the simulation, which effectively proves the correctness of the analysis. As the amplitude of the excitation increases, the vibration shows a significant nonlinearity. At this time, the blades treated by LSP show an unusual jump phenomenon, which limits the vibration amplitude in a smaller range. A further experimental analysis is performed for the interpretation of this phenomenon. Based on the above results, it is proved that the local LSP can effectively control the vibration of a certain mode, which provides a more flexible method for blade design, especially for improved design of the blade after styling. Nonlinear dynamics Elsevier Laser shock peening Elsevier Vibration Elsevier Modal stiffness Elsevier Modal damping Elsevier Cheng, Li oth Li, Silu oth He, Weifeng oth Lu, Kaijv oth Enthalten in Academic Press Robison, K.M. ELSEVIER Cancer of the uterus and treatment of incontinence (CUTI) 2015 London (DE-627)ELV012704822 volume:445 year:2019 day:14 month:04 pages:2-16 extent:15 https://doi.org/10.1016/j.jsv.2018.12.035 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_20 GBV_ILN_30 GBV_ILN_40 44.11 Präventivmedizin VZ AR 445 2019 14 0414 2-16 15 |
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The zones with stretching of the mid-plane are selected for LSP, which leads to residual stresses and grain refinement, in order to control the corresponding mode. A kind of diamond-shaped specimen is chosen as the object of the study to simulate the actual blade. First, theoretical measurements and the finite element method are used to analyze the mechanism of selective modal control. The effects of LSP in different selected zones on modal stiffness and damping are compared, and the selective modal control is simulated. Then, an excitation test was conducted; the experimental results are in good agreement with the simulation, which effectively proves the correctness of the analysis. As the amplitude of the excitation increases, the vibration shows a significant nonlinearity. At this time, the blades treated by LSP show an unusual jump phenomenon, which limits the vibration amplitude in a smaller range. A further experimental analysis is performed for the interpretation of this phenomenon. Based on the above results, it is proved that the local LSP can effectively control the vibration of a certain mode, which provides a more flexible method for blade design, especially for improved design of the blade after styling.</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">The main purpose of this study is to explore the selective modal control of blade vibrations using laser shock peening (LSP) for the mode shapes with stretching of the mid-plane, which are commonly encountered in some local zones of the higher-order mode shapes. The zones with stretching of the mid-plane are selected for LSP, which leads to residual stresses and grain refinement, in order to control the corresponding mode. A kind of diamond-shaped specimen is chosen as the object of the study to simulate the actual blade. 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selective modal control of blade vibrations by local laser shock peening |
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Selective modal control of blade vibrations by local laser shock peening |
| abstract |
The main purpose of this study is to explore the selective modal control of blade vibrations using laser shock peening (LSP) for the mode shapes with stretching of the mid-plane, which are commonly encountered in some local zones of the higher-order mode shapes. The zones with stretching of the mid-plane are selected for LSP, which leads to residual stresses and grain refinement, in order to control the corresponding mode. A kind of diamond-shaped specimen is chosen as the object of the study to simulate the actual blade. First, theoretical measurements and the finite element method are used to analyze the mechanism of selective modal control. The effects of LSP in different selected zones on modal stiffness and damping are compared, and the selective modal control is simulated. Then, an excitation test was conducted; the experimental results are in good agreement with the simulation, which effectively proves the correctness of the analysis. As the amplitude of the excitation increases, the vibration shows a significant nonlinearity. At this time, the blades treated by LSP show an unusual jump phenomenon, which limits the vibration amplitude in a smaller range. A further experimental analysis is performed for the interpretation of this phenomenon. Based on the above results, it is proved that the local LSP can effectively control the vibration of a certain mode, which provides a more flexible method for blade design, especially for improved design of the blade after styling. |
| abstractGer |
The main purpose of this study is to explore the selective modal control of blade vibrations using laser shock peening (LSP) for the mode shapes with stretching of the mid-plane, which are commonly encountered in some local zones of the higher-order mode shapes. The zones with stretching of the mid-plane are selected for LSP, which leads to residual stresses and grain refinement, in order to control the corresponding mode. A kind of diamond-shaped specimen is chosen as the object of the study to simulate the actual blade. First, theoretical measurements and the finite element method are used to analyze the mechanism of selective modal control. The effects of LSP in different selected zones on modal stiffness and damping are compared, and the selective modal control is simulated. Then, an excitation test was conducted; the experimental results are in good agreement with the simulation, which effectively proves the correctness of the analysis. As the amplitude of the excitation increases, the vibration shows a significant nonlinearity. At this time, the blades treated by LSP show an unusual jump phenomenon, which limits the vibration amplitude in a smaller range. A further experimental analysis is performed for the interpretation of this phenomenon. Based on the above results, it is proved that the local LSP can effectively control the vibration of a certain mode, which provides a more flexible method for blade design, especially for improved design of the blade after styling. |
| abstract_unstemmed |
The main purpose of this study is to explore the selective modal control of blade vibrations using laser shock peening (LSP) for the mode shapes with stretching of the mid-plane, which are commonly encountered in some local zones of the higher-order mode shapes. The zones with stretching of the mid-plane are selected for LSP, which leads to residual stresses and grain refinement, in order to control the corresponding mode. A kind of diamond-shaped specimen is chosen as the object of the study to simulate the actual blade. First, theoretical measurements and the finite element method are used to analyze the mechanism of selective modal control. The effects of LSP in different selected zones on modal stiffness and damping are compared, and the selective modal control is simulated. Then, an excitation test was conducted; the experimental results are in good agreement with the simulation, which effectively proves the correctness of the analysis. As the amplitude of the excitation increases, the vibration shows a significant nonlinearity. At this time, the blades treated by LSP show an unusual jump phenomenon, which limits the vibration amplitude in a smaller range. A further experimental analysis is performed for the interpretation of this phenomenon. Based on the above results, it is proved that the local LSP can effectively control the vibration of a certain mode, which provides a more flexible method for blade design, especially for improved design of the blade after styling. |
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