基于DFM/FEM铝蜂窝夹层结构耦合损耗因子预测  

Coupling loss factors estimation of aluminum honeycomb sandwich structures using DFM/FEM

作　　者：孔宪仁[1] 王英诚[2] 张红亮[3] 

机构地区：[1]哈尔滨工业大学卫星技术研究所,哈尔滨150080 [2]北京强度环境研究所,北京100076 [3]中国空间技术研究院航天东方红卫星有限公司,北京100010

出　　处：《振动与冲击》2016年第1期125-131,共7页Journal of Vibration and Shock

摘　　要：在使用统计能量分析对复杂的蜂窝夹层结构进行高频动力学响应预示的关键环节之一在于准确估算耦合损耗因子。研究应用对偶模态/有限元法(DFM/FEM)估算铝蜂窝夹层结构之间的耦合损耗因子,通过算例对该方法进行仿真验证,结果表明,该方法可行且高效准确。最后对L型耦合铝蜂窝夹层板结构进行振动实验,并使用功率输入法辨识试件间的耦合损耗因子,比较功率输入和和对偶模态/有限元法结果,两者一致性好,进一步验证了对偶模态/有限元法估算铝蜂窝夹层板系统耦合损耗因子的可行性,扩展了统计能量分析在复杂结构上的应用。The accurate estimate of coupling loss factor is one of key steps in a SEA prediction for high frequency dynamic responses of honeycomb sandwich structures. Here, coupling loss factors estimation of aluminum honeycomb sandwich structures was studied using the dual formulation method/finite element method （DFM/FEM）. The numerical simulation results demonstrated that the proposed method is feasible and effective. The vibration tests on L-shaped aluminum honeycomb sandwich plates were conducted, and the power input method was used to identify the coupling loss factor among the tested plates. The results with the power input method agreed well with those using DFM/FEM. So, the coupling loss factors estimation of aluminum honeycomb sandwich structures using DFM/FEM was verified to be feasible. The method extended applications of SEA in complex structures.

关 键 词：统计能量分析 对偶模态法 耦合损耗因子 铝蜂窝夹层板 

分 类 号：V416.2[航空宇航科学与技术—航空宇航推进理论与工程] TB533[理学—物理]