Non-linear shock response analysis of an underwater launch system and parametric optimization of shock isolator

被引：0
|
作者：
Zhang Y. [1 ,2 ]
Su J. [1 ,2 ]
Dong Y. [3 ]
Peng X. [3 ]
Hua H. [1 ,2 ]
机构：
[1] State Key Lab of Mechanical System and Vibration, Shanghai JiaoTong University, Shanghai
[2] Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai
[3] Beijing Mechanical Equipment Research Institute, Beijing
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2019年 / 38卷 / 03期
关键词：
Direct integration method; Non-linear shock response; Parametric optimization; Successive launches;
D O I：
10.13465/j.cnki.jvs.2019.03.023
中图分类号：
学科分类号：
摘要：
Successive launches of underwater projectiles cause problems of vibration superposition and sudden changes of mass and stiffness of their launch system, and this situation needs to adopt the non-linear method to do shock response analysis. Here, the underwater launch system (ULS) was simplified as a multi-DOF nonlinear time-varying system. The governing dynamic equations of the system were derived with Newton's second law, where the system's mass, damping, stiffness and external load matrices changed with variation of time. Non-linear shock responses of the system were numerically solved with Newmark direct integration method. Numerical examples were given using the proposed method. The correctness of the method was verified by comparing the calculated results with those obtained using the finite element method (FEM). The system's shock response characteristics were analyzed. Finally, a method was proposed to optimize stiffness and damping parameters of the system's vertical shock isolator. The study results provided an effective analysis means for design and parametric optimization of launch systems' shock isolators in engineering practice. © 2019, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：164 / 169
页数：5
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