三角形弯曲板的动态有限元阻抗矩阵

用单一的阻抗矩阵的频率展开式表述三角形弯曲板的动态有限元。对直角三角形弯曲板元，建立了直到二阶的阻抗阵展开项。用常规有限元和二次动态有限元解算了一个悬臂三角形弯曲板的前六阶固有频率。

The Impedance Matrix of the Finite Dynamic Element of Triangular Bending Plate

The finite dynamic element of triangular bending plale is expressed in frequency expansion form of a single impedance matrix. For a right triangle bending plate element, the impedance matrix expansion terms to the second order are formed. The First six natural frequencies of a cantilevered triangular bending plate are calculated both by the conventional finite element and by the second order linite dynamic element.