某导弹无依托发射场坪动态响应与破坏形态研究

在采用混凝土脆性开裂模型建立某导弹无依托发射场坪有限元模型的基础上,研究发射时场坪的动态响应与破坏形态,讨论裂纹产生、延伸及扩展的过程。通过对应力波在场坪介质不同位置下随时间传播变化规律的研究,得到发射场坪的破坏路径及3个状态区域范围。结果表明:发射场坪裂纹的发展、不同时刻的破坏形态、破坏路径及3个状态区域范围均与应力波传播有密切关系。

Dynamic response and failure mode of a missile unsupported random launching site

Based on the finite element model of missile unsupported random launching site established using brittle cracking of concrete,dynamic response and failure mode of launching site were studied,and the formation,growth and extension of crack were discussed. Through the analysis of propagation law of stress waves under different locations,the fracture path and the three status areas were obtained. The results show that the development of crack,failure mode at different moments,fracture path and the three status areas in launching site have close relationships with the propagation of stress waves.