under spall的意思|示意

Under the condition of directly hit with precision-guided munitions, the research on the spall-resistant dam- age for underground structures has become important in protective engineering.

用钢板对地下结构进行抗震塌破坏加固改造，已成为精确打击条件下坑道防护工程研究的重要内容之一。

According to the curve, the spall strength, the thickness of spall scab and the tensile strain rate under different condition were obtained.

根据所得曲线波形计算出相应条件下的层裂强度、层裂片厚度以及各自的应变率，最后得到层裂强度随拉伸应变率变化的关系曲线。