基于有限元和边界元理论的结合,利用大型有限元分析软件ANSYS和声振分析软件SYSNOISE,建立了重流体介质与半封闭结构的耦合振动声辐射模态分析模型,并采用结构有限元和流体有限元相结合,以建筑圆柱钢模板的振动声辐射为例进行模态分析、振动响应以及声辐射特性分析,得到了在流体加载下模板的耦合模态振型、结构的节点位移、结构能量等等。还利用CAE软件结果的可移植性,考虑了半封闭加筋圆柱结构内外分布不同介质时,实现了双边耦合振动声辐射分析求解。这一求解方法的实现对今后该类振动声辐射分析提供了重要的参考。
Based on the finite element theory and the boundary element theory, a coupled vibra-acoustic analysis model of heavy fluid medium and Semi-closed Structure by using software ANSYS and software SYSNOISE is proposed for analysing structural modes, vibration response and acoustics. Examples of the vibra-acoustic analysis of a fluid-loaded columniform structural template are given to obtain coupled vibration modes, nodal displacement, structural energy, etc. The examples actualize analysis of bilateral coupled vibration and acoustic radiation by using transitivity of CAE software results. The course of the coupling analysis actualized can be an important reference for vibra-acoustic research in this field.