用于结构振动模态分析的改进的有限元法

IMPROVED FEM FOR STRUCTURE MODE ANALYSIS

提出了两种分别适用于板的面内振动和圆环板弯曲振动模态分析的Fourier级数形式的插值形函数。数值计算结果表明 :对于结构振动模态分析 ,Fourierp_单元法能够有效地提高计算精度及收敛速度 ,特别是对于较高阶的模态效果更为明显。

Two kinds of Fourier version shape functions are constructed,which are suitable for plate in-plane vibration and annular plate vibration mode analysis,respectively.Numerical results show that for structure mode analysis Fourier p-element method can achieve high accuracy and converge very fast,especially for higher modes.