单元的应变式中
???????Bi????i????B?????i?14ee
??Bi?????L????Ni??
单元的应力式中
?M????D??????????Si????i????S?????i?14ee
??Si?????D????Bi??
4. 单元刚度矩阵 单元的刚度矩阵为:
??k???e????B??T??D????B??dxdy
单元的应变式中
???????Bi????i????B?????i?14ee
??Bi?????L????Ni??
单元的应力式中
?M????D??????????Si????i????S?????i?14ee
??Si?????D????Bi??
4. 单元刚度矩阵 单元的刚度矩阵为:
??k???e????B??T??D????B??dxdy