机构地区: 大连交通大学机械工程学院
出 处: 《振动与冲击》 2006年第2期106-108,共3页
摘 要: 基于有限元模型分析了声场-结构耦合系统的左、右特征向量关系式,证明声场-结构耦合系统左特征向量可用右特征向量的分量来表示,基于此分析推导出声场-结构耦合系统的特征值敏度表达式。以一矩形声场-结构耦合系统为实例进行计算,基于Nastran对声场-结构耦合系统进行模态分析,用其内部的DAMP语言编程计算了特征值敏度。结果验证了该方法的有效性及正确性。 It is put forward that the left eigenvectors can be presented by the acoustic components and structural components of the right eigenvectors as well as the eigenvalues based on FEM model. A new formulation for calculating sensitivity of the eigenvalues is obtained based on this proposition. An example of application of the method to a coupled acoustic-structure box is illustrated to verify its effectiveness and correctness.