The critical service life for rocketgrain was presumed at present.
目前药柱贮存寿命失效临界点一般都是假设确定的。
2
Three-dimension analysis of solid rocket motor grain was presented based on incompressible and nearly incompressible viscoelastic finite element method.
基于不可压和近似不可压粘弹性有限元法，对固体火箭发动机药柱进行了三维分析。
3
The 300mm diameter solid propellant rocket motor employs a composite propellant end burning grain.