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

固体力学与飞行器总体设计

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运动导弹激励下柔性导轨振动的多体动力学分析法

王林鹏, 王汉平, 杨鸣, 毕世华, 王绍助

北京理工大学宇航学院, 北京 100081

收稿日期:2013-05-08 修回日期:2013-11-29 出版日期:2014-03-25 发布日期:2013-12-17
通讯作者: 王汉平，Tel.：010-68914112 E-mail：whp161@bit.edu.cn E-mail:whp161@bit.edu.cn
作者简介:王林鹏男，博士研究生。主要研究方向：刚柔耦合多体动力学与振动控制。Tel：010-68914112 E-mail：linpeng_wang@126.com；王汉平男，硕士，副教授，硕士生导师。主要研究方向：兵器发射理论与技术。Tel：010-68914112 E-mail：whp161@bit.edu.cn
基金资助:
部级项目

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

WANG Linpeng, WANG Hanping, YANG Ming, BI Shihua, WANG Shaozhu

School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, China

Received:2013-05-08 Revised:2013-11-29 Online:2014-03-25 Published:2013-12-17
Supported by:
Ministry Level Project

摘要/Abstract

摘要：

针对导弹轨式发射采用柔性接触进行动力学建模后计算稳定性差、结构复杂时计算规模大的问题，提出了一种用能随柔性导轨变形的柔性点线约束来替代导弹定向钮与导轨之间接触关系的建模方法；基于有限元模型、单段导轨多体动力学模型和多段拼接导轨多体动力学模型的模态和静态对比分析，验证并消除了应力刚化效应的影响；在考虑导轨应力刚化效应的前提下构建了运动导弹激励下柔性导轨振动的多体动力学模型。仿真结果表明，该方法不仅可以有效解决柔性体接触算法计算量大、计算稳定性差等问题，而且也具有较好的仿真精度。该方法可为复杂导弹发射系统发射过程的多柔体动力学建模提供可行的简化途径。

关键词: 发射动力学, 柔性导轨, 柔性线, 多体动力学, 应力刚化, 形函数

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

中图分类号:

王林鹏, 王汉平, 杨鸣, 毕世华, 王绍助. 运动导弹激励下柔性导轨振动的多体动力学分析法[J]. 航空学报, 2014, 35(3): 756-763.

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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E-mail：hkxb@buaa.edu.cn

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运动导弹激励下柔性导轨振动的多体动力学分析法

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

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