双层蜂窝夹芯结构自由振动特性分析研究  

STUDY ON FREE VIBRATION ANALYSIS FOR HONEYCOMB SANDWICH STRUCTURE WITH DOUBLE CORES

作　　者：卢翔[1] 杨玖月 王瑞鹏[1] 钱若力[1] LU Xiang ,YANG JiuYue ,WANG RuiPeng, QIAN RuoLi(College of Aeronautical Engineering, Civil Aviation University of China, Tianjing 300300, China)

机构地区：[1]中国民航大学航空工程学院,天津300300

出　　处：《机械强度》2018年第5期1030-1036,共7页Journal of Mechanical Strength

基　　金：国家自然基金青年基金项目(11502286);中国民用航空局技术创新项目(MHRD20160105)资助~~

摘　　要：采用逐层/实体元方法(Layerwise/Solid-Elements,LW/SE)和动态子结构法中的固定界面模态综合法研究了双层蜂窝夹芯结构的自由振动特性问题。基于LW/SE和固定界面模态综合法,分别建立了双层蜂窝夹芯结构的控制方程和总体模态空间,利用控制方程和总体模态空间建立双层蜂窝夹芯结构总体模态空间下的控制方程。方法在保证固有频率计算精度的同时,降低了对计算内存的需求。通过数值算例将方法与三维实体有限元分析结果进行了对比,验证了方法的正确性。The free vibration problem of the honeycomb sandwich structure with double cores was studied based on the Layerwise/Solid-Elements（ LW/SE） and Fixed-interface Modal Synthesis Technique（ FMST） of the dynamic substructure method. The governing equation and the total modal space of the honeycomb sandwich structure were assembled based on LW/SE and FMST,respectively,and the final governing equation on the basis of the modal spaces was assembled based on the governing equation and the total modal space. This method obtains the natural frequency of the honeycomb sandwich structure with double cores accurately and reduces memory requirement. The numerical results of the method are compared with those obtained by the 3D solid finite element,and good agreements are achieved.

关 键 词：逐层/实体元法 固定界面模态综合法 动态子结构法 蜂窝夹芯结构 自由振动 

分 类 号：TB53[理学—物理]