A Ball-Contacting Dynamic Vibration Absorber with Adjustable Stiffness and Nonlinear Characteristics
Structural vibration has always been a major concern in the engineering field. A dynamic vibration absorber in the form of contacts with adjustable stiffness (CDVA) offers effective vibration suppression and can improve conventional dynamic vibration absorbers with high sensitivity to frequency devi...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-03-01
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| Series: | Aerospace |
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| Online Access: | https://www.mdpi.com/2226-4310/11/3/229 |
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| author | Ziqiang Hu Lei Wei Lin Yang Yansong Wang Yuanpeng Fan |
| author_facet | Ziqiang Hu Lei Wei Lin Yang Yansong Wang Yuanpeng Fan |
| author_sort | Ziqiang Hu |
| collection | DOAJ |
| description | Structural vibration has always been a major concern in the engineering field. A dynamic vibration absorber in the form of contacts with adjustable stiffness (CDVA) offers effective vibration suppression and can improve conventional dynamic vibration absorbers with high sensitivity to frequency deviation and difficulty in adjusting the frequency. In this research, first, based on the theoretical model of the contact between a rubber ball and an inner cone, the feasibility of changing the axial contact state to change the structure’s natural frequency was verified using an ANSYS simulation. A theoretical model of the static contact stiffness between the ball and the inner cone was constructed using Hertzian contact theory and Hooke’s law, and a theoretical model of the cubic nonlinear elastic restoring force was used to characterize the stiffness properties of the rubber ball during compressive rebound. The steady-state frequency response equations of the main vibration structure were derived using the averaging method in conjunction with the two-degree-of-freedom dynamics model, and the stability of the solutions to the frequency response equations was obtained in conjunction with the stability determination criterion. Then, the impact of the CDVA’s design parameters on the nonlinear dynamic response of the primary vibration structure was simulated and analyzed. The resulting findings can serve as guidance for designing dynamic vibration absorber parameters. Based on the principles of ball-inner cone contact, a dynamic vibration absorber structure was proposed. A design test was conducted to verify the correctness of the contact stiffness model, and an experimental study was carried out to investigate the law of change in the dynamic stiffness and damping of the principle structure of CDVA under dynamic excitation conditions. Finally, the vibration test platform of the solidly supported beam structure was constructed, and vibration suppression tests of the CDVA in different compression states were conducted to investigate the tunability and feasibility of CDVA vibration suppression. The results showed that the dynamic vibration absorber had good vibration absorption characteristics and could be used for single-mode vibration suppression of multimodal main structures. |
| first_indexed | 2024-04-24T18:40:30Z |
| format | Article |
| id | doaj.art-f7d162a006e348f0b2765bc635530e41 |
| institution | Directory Open Access Journal |
| issn | 2226-4310 |
| language | English |
| last_indexed | 2024-04-24T18:40:30Z |
| publishDate | 2024-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Aerospace |
| spelling | doaj.art-f7d162a006e348f0b2765bc635530e412024-03-27T13:15:43ZengMDPI AGAerospace2226-43102024-03-0111322910.3390/aerospace11030229A Ball-Contacting Dynamic Vibration Absorber with Adjustable Stiffness and Nonlinear CharacteristicsZiqiang Hu0Lei Wei1Lin Yang2Yansong Wang3Yuanpeng Fan4Institute of Frontiers and Interdisciplinary, Shandong University, Binhai Road 72, Qingdao 266200, ChinaInstitute of Frontiers and Interdisciplinary, Shandong University, Binhai Road 72, Qingdao 266200, ChinaInstitute of Frontiers and Interdisciplinary, Shandong University, Binhai Road 72, Qingdao 266200, ChinaInstitute of Frontiers and Interdisciplinary, Shandong University, Binhai Road 72, Qingdao 266200, ChinaInstitute of Frontiers and Interdisciplinary, Shandong University, Binhai Road 72, Qingdao 266200, ChinaStructural vibration has always been a major concern in the engineering field. A dynamic vibration absorber in the form of contacts with adjustable stiffness (CDVA) offers effective vibration suppression and can improve conventional dynamic vibration absorbers with high sensitivity to frequency deviation and difficulty in adjusting the frequency. In this research, first, based on the theoretical model of the contact between a rubber ball and an inner cone, the feasibility of changing the axial contact state to change the structure’s natural frequency was verified using an ANSYS simulation. A theoretical model of the static contact stiffness between the ball and the inner cone was constructed using Hertzian contact theory and Hooke’s law, and a theoretical model of the cubic nonlinear elastic restoring force was used to characterize the stiffness properties of the rubber ball during compressive rebound. The steady-state frequency response equations of the main vibration structure were derived using the averaging method in conjunction with the two-degree-of-freedom dynamics model, and the stability of the solutions to the frequency response equations was obtained in conjunction with the stability determination criterion. Then, the impact of the CDVA’s design parameters on the nonlinear dynamic response of the primary vibration structure was simulated and analyzed. The resulting findings can serve as guidance for designing dynamic vibration absorber parameters. Based on the principles of ball-inner cone contact, a dynamic vibration absorber structure was proposed. A design test was conducted to verify the correctness of the contact stiffness model, and an experimental study was carried out to investigate the law of change in the dynamic stiffness and damping of the principle structure of CDVA under dynamic excitation conditions. Finally, the vibration test platform of the solidly supported beam structure was constructed, and vibration suppression tests of the CDVA in different compression states were conducted to investigate the tunability and feasibility of CDVA vibration suppression. The results showed that the dynamic vibration absorber had good vibration absorption characteristics and could be used for single-mode vibration suppression of multimodal main structures.https://www.mdpi.com/2226-4310/11/3/229dynamic vibration absorberrubber ballinner conehertz contactnonlinear characteristics |
| spellingShingle | Ziqiang Hu Lei Wei Lin Yang Yansong Wang Yuanpeng Fan A Ball-Contacting Dynamic Vibration Absorber with Adjustable Stiffness and Nonlinear Characteristics Aerospace dynamic vibration absorber rubber ball inner cone hertz contact nonlinear characteristics |
| title | A Ball-Contacting Dynamic Vibration Absorber with Adjustable Stiffness and Nonlinear Characteristics |
| title_full | A Ball-Contacting Dynamic Vibration Absorber with Adjustable Stiffness and Nonlinear Characteristics |
| title_fullStr | A Ball-Contacting Dynamic Vibration Absorber with Adjustable Stiffness and Nonlinear Characteristics |
| title_full_unstemmed | A Ball-Contacting Dynamic Vibration Absorber with Adjustable Stiffness and Nonlinear Characteristics |
| title_short | A Ball-Contacting Dynamic Vibration Absorber with Adjustable Stiffness and Nonlinear Characteristics |
| title_sort | ball contacting dynamic vibration absorber with adjustable stiffness and nonlinear characteristics |
| topic | dynamic vibration absorber rubber ball inner cone hertz contact nonlinear characteristics |
| url | https://www.mdpi.com/2226-4310/11/3/229 |
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