运动导弹激励下柔性导轨振动的多体动力学分析法

doi:10.7527/S1000-6893.2013.0481

Abstract

Abstract:

For a launching dynamics model of a guide-type missile launcher system based on the flexible contact method, the stability is unsatisfactory, and the calculation scale is also too large when the guide shape is complex. To solve this problem, a modeling method is proposed which substitutes the flexible point-curve joint following the flexible guide for the contact relationship between the missile directional supports and the guide. By comparing the modal and static analysis results of the finite element model, the single segment guide dynamics model and the multi-segment guide dynamics model, the stress stiffening effect is verified and eliminated. Taking the stress stiffening effect of the flexible guide into consideration, a multi-body dynamics model is established which describes the vibration of the flexible guide activated by a moving missile. The simulation results show that the method not only effectively resolves the low efficiency of the flexible body contact algorithm, significantly improves the calculation stability, but also demonstrates good simulation accuracy. This method may provide a new way for modeling flexible multi-body dynamics of complex missile launcher systems.

Key words: launch dynamics, flexible guide, flexible curve, multi-body dynamics, stress stiffening, shape function

CLC Number:

WANG Linpeng, WANG Hanping, YANG Ming, BI Shihua, WANG Shaozhu. Multi-body Dynamics Analysis Method for Vibration of Flexible Guide Activated by Moving Missile[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2014, 35(3): 756-763.

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Multi-body Dynamics Analysis Method for Vibration of Flexible Guide Activated by Moving Missile

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