Steady-state responses of mechanical system attached to non-smooth vibration absorber with piecewise damping and stiffness
| Autor: | M. Sun, Hu Wenhua, Jian-en Chen, J. Liu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Steady state
Materials science Mechanical Engineering Stiffness 02 engineering and technology Mechanics Condensed Matter Physics 01 natural sciences Vibration Piecewise linear function Dynamic Vibration Absorber Nonlinear system 020303 mechanical engineering & transports 0203 mechanical engineering Mechanics of Materials 0103 physical sciences Piecewise Harmonic medicine medicine.symptom 010301 acoustics |
| Zdroj: | Meccanica. 56:275-285 |
| ISSN: | 1572-9648 0025-6455 |
| DOI: | 10.1007/s11012-020-01288-x |
| Popis: | The steady-state dynamic characteristics of non-smooth vibration absorbers are investigated. The complexification-averaging method is used to obtain the steady-state response equation of a harmonic excited primary system attached to the non-smooth absorbers, with the equation solved using a Matlab program based on the least square method. Research results indicate that the traditional purely nonlinear absorber loses its efficacy after the excitation amplitude reaches a certain value. The non-smooth absorber with piecewise linear damping, by contrast, can suppress vibration of the primary system within a larger range of excitation amplitude than the purely nonlinear absorber. Then, the cubic stiffness component is substituted by a piecewise stiffness component to further enhance the performance of the above non-smooth absorber and good results are obtained. The non-smooth absorber with both piecewise damping and stiffness shows the stronger vibration absorption performance. In addition, the differences of higher branches of response which induced by the three absorbers are analyzed and discussed. |
| Databáze: | OpenAIRE |
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