Study on dynamic response of multi-body structure under explosive driving

• Published in: Science China. Technological sciences Vol. 59; no. 9; pp. 1360 - 1369
• Main Authors: Zhao, YuZhe, Ma, TianBao, Li, Jian, Ning, JianGuo
• Format: Journal Article
• Language: English
• Published: Beijing Science China Press 01.09.2016; Springer Nature B.V
• Subjects: Centroids; Computer simulation; Dynamic response; Engineering; Euler-Lagrange equation; Finite element method; LS-DYNA; Mathematical models; Response time; Structural shapes; 动态响应; 多体结构; 数值模拟; 爆炸驱动; 第二类拉格朗日方程; 结构动力响应; 验证模型; explosive driving; multi-body structure; experimental investigation; dynamic model; numerical simulation
• ISSN: 1674-7321; 1869-1900
• DOI: 10.1007/s11431-016-0263-4

In this study, a complex multi-body structure was proposed, and the mechanism for the dynamic response of the structure under explosive driving was investigated by using the Lagrange equations of the second kind. An initial value subject to explosion loading was analyzed to develop the theoretical model of the dynamic response, and the centroid trajectory of three different structural shapes was solved. To verify the accuracy of the theoretical model, numerical simulation via finite element analysis within LS-DYNA and a dynamic experiment were conducted, and the consistent dynamic response process of the multi-body structure was obtained. In addition, the dynamic response time of the multi-body structure under different explosion loading conditions was calculated by the theoretical model, numerical simulation, and experimental investigation. It was found that the increased opening charge mass reduces the dynamic response time.