排序方式: 共有13条查询结果,搜索用时 15 毫秒
1.
2.
In the investigation on fracture mechanics, the potential function was introduced,and the moving differential equation was constructed. By making Laplace and Fourier transformation as well as sine and cosine transformation to moving differential equations and various responses, the dual equation which is constructed from boundary conditions lastly was solved. This method of investigating dynamic crack has become a more systematic one that is used widely. Some problems are encountered when the dynamic crack is studied.After the large investigation on the problems, it is discovered that during the process of mathematic derivation, the method is short of precision, and the derived results in this method are accidental and have no credibility. A model for example is taken to explain the problems existing in initial deriving process of the integral-transformation method of dynamic crack. 相似文献
3.
4.
5.
6.
7.
8.
9.
超静定桁架变形协调方程 的新方法 总被引:3,自引:0,他引:3
在三角形桁架变形协调的基础上,提出了建立超静定桁架的变形协调方程的新方法,此法简便易行,更利于数值计算。 相似文献