中文摘要：

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FEMMODENA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。

英文摘要：

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.