噪声激励下典型复合材料铆接结构的声固耦合分析

发布时间：2018-03-18 01:10

  本文选题：铆钉连接　切入点：界面接触　出处：《固体火箭技术》2017年02期 　论文类型：期刊论文

【摘要】：针对CVI工艺下复合材料典型铆接板,提出一种适合复杂模型动力学分析的建模方法:采用Bush和RBE2的组合单元模拟铆钉连接,将板间的弱非线性接触力转化为接触刚度,建立该复合材料铆接板的有限元模型。同时,基于有限元-间接边界元法推导了考虑接触力的声固耦合动力学方程,开展了该复合材料铆接板在随机噪声激励下的声固耦合分析,并探讨界面接触对声固耦合系统固有特性和动响应的影响。研究结果表明,界面接触模型比界面刚接模型更为准确;刚接模型会增大复合材料铆接板连接界面的局部刚度,使得结构的固有频率偏高,响应峰值向高频处移动;考虑接触对结构的加速度响应影响较大,对应力响应影响较小。
[Abstract]:Aiming at the typical riveted plate of composite material under CVI process, a modeling method suitable for dynamic analysis of complex model is proposed. The rivet connection is simulated by the combined element of Bush and RBE2, and the weak nonlinear contact force between the plates is transformed into contact stiffness. The finite element model of the composite riveted plate is established, and the acousto-solid coupling dynamic equation considering the contact force is derived based on the finite element method and indirect boundary element method. The acousto-solid coupling analysis of the composite riveted plate under random noise excitation is carried out, and the influence of interface contact on the natural characteristics and dynamic response of the acousto-solid coupling system is discussed. The interface contact model is more accurate than the rigid interface model, and the rigid contact model increases the local stiffness of the interface of the composite riveted plate, which makes the natural frequency of the structure higher and the response peak moving to the high frequency. Considering the contact, the acceleration response of the structure is greatly affected, and the stress response is less affected.
【作者单位】： 东南大学工程力学系;江苏省工程力学重点分析实验室;贵州风雷航空军械有限责任公司;
【基金】：国家自然科学基金(11572086&11402052) 教育部新世纪优秀人才支持计划(NCET-11-0086) 江苏省自然科学基金(BK20140616) 江苏省普通高校研究生科研创新计划资助项目(CXZZ13_0084)
【分类号】：TB332
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本文编号：1627310