关于结构塑性动力失效若干问题的研究进展

重点分析常见工程结构元件（如梁、板、圆柱壳、圆环和夹层及复合材料结构）在强动短时载荷下塑性动力失效的研究方法、进展及尚待解决的问题，这些结构元件的失效模式及分析方法具有普遍意义，建议借用无量纲数──损伤数（ｄａｍａｇｅｎｕｍｂｅｒ）──来统一表征结构塑性动力失效的判据，最后以海洋平台和桁架为例简单介绍工程中复杂结构动力失效分析的情况。

ON THE SOME ADVANCES IN STUDIES OF STRUCTURAL DYNAMIC PLASTIC FAILURE

This paper presents recent advances in the studies of dynamic plastic failure of commonly used engineering structural elements (such as beams, plates,cylindrical shells, circular rings, and structures of sandwich or composite materlals), subjected to large dynamic loads over a short-duration. The failure modes of such structural elements are of universal significance. It is suggested in this paper that a nondimensional number, the damage number, be used to represent a universal failure criterion for different failure modes. Ocean plat-form and bar structures are taken to be two examples to explain problems in the analysis of dynamic failure of complicated structures.