基于FEM-MODENA的加筋板声-固耦合分析  

Structural-acoustic coupling analysis of a stiffened plate based on FEM-MODENA

作　　者：于士甲[1] 张鹏[1] 李彦斌[2] 吴邵庆[1] 费庆国[1,2] 韩晓林[1] 

机构地区：[1]东南大学工程力学系,江苏南京210096 [2]东南大学机械工程学院,江苏南京211189

出　　处：《振动工程学报》2017年第2期262-269,共8页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(11572086;11402052);江苏省自然科学基金资助项目(BK20140616)

摘　　要：模态能量分析(MODENA)是近年发展的研究声-固耦合问题的新方法。结合有限元法(FEM),形成基于FEM-MODENA的适用于复杂结构的声-固耦合动响应分析方法。以规则的平板-长方体声腔耦合系统为研究对象验证FEM-MODENA方法的准确性和有效性,然后将该方法应用于复杂加筋板-声腔耦合系统的动响应分析中。结果表明:FEM-MODENA对复杂声-固耦合系统的振动能量响应预示具有较好的精度,是一种可靠的动响应分析手段;对于系统在局部分析频段内的振动响应预示,FEM-MODENA仍可给出较为精确的结果。Modal Energy Analysis （MODENA） is a new method which is proposed to solve the structural acoustic coupling ana lyses. An algorithm that integrates finite element method （FEM） and MODENA is proposed to carry out the structural-acoustic coupling analyses of complex dynamic systems. Firstly, the accuracy and efficiency of the algorithm is proved by a regular rectangular plate coupled with a parallelepiped cavity. Then the proposed algorithm is applied to a stiffened plane-cavity coupling system. Results show that the FEM-MODENA can carry out the structural-acoustic analyses with sufficient accuracy compared with the FEM-FEM results. Meanwhile, the algorithm can still provide a good approximation about the energy response of structure and acoustic domain when the modes in specific frequency range are taken into account.

关 键 词：声-固耦合 加筋板 模态能量分析 有限元法 振动能量 

分 类 号：V414.8[航空宇航科学与技术—航空宇航推进理论与工程] O422.8[理学—声学]