Mechanical properties of piecewise linear stiffness energy sinks under impact load and its optimization
CUI Taiyu1, 2, ZHANG Lei1,3, JIA Xuezhi3, WEI Lei3
1.Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130032, China;
2.University of Chinese Academy of Sciences, Beijing 100049, China;
3.Chang Guang Satellite Technology Co.,Ltd., Changchun 130031, China
Abstract:Piecewise linear stiffness energy sinks are a kind of nonlinear energy sinks.Being a passive damping device, it can dissipate the vibration energy of the main structure quickly by virtue of the phenomenon of target energy transfer.The energy dissipation efficiency of a segmented linear stiffness energy well under impact load was optimized.The slow-change equation of the two-degree of freedom model of the coupled-segment linear-stiffness energy well under impact load was derived by means of complex-averaging method.The approximate expression of the extreme point of slow invariant manifold was obtained by use of polynomial approximation.On this basis, an optimization model with the goal of energy dissipation efficiency of energy sinks was established.In the end, the validity of the model was verified.It’s shown that the optimization model is reasonable, the experimental results show the effectiveness of the optimization parameters, and the energy well with piecewise linear stiffness effectively improves the energy dissipation rate of the system.
崔泰毓1,2,张雷1,3,贾学志3,魏磊3. 冲击载荷下分段线性刚度能量阱的优化研究[J]. 振动与冲击, 2021, 40(10): 253-260.
CUI Taiyu1, 2, ZHANG Lei1,3, JIA Xuezhi3, WEI Lei3. Mechanical properties of piecewise linear stiffness energy sinks under impact load and its optimization. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(10): 253-260.
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