含热传导的冲击动力学有限元程序的研究与应用

从有限变形的基本框架出发 ,建立了含热传导的冲击动力学基本控制方程和合适的初边条件。应用变分原理和伽辽金方法得出了控制方程相应的有限元列式 ,并探讨了数值计算中的几个关键算法 ,主要包括构型转换、旋转张量的算法、本构算法以及计算流程和程序框图等。利用自行研制的程序 ,对长脉冲激光辐照下靶目标的变形和破坏、冲击压缩变形及变形局部化等问题进行了数值模拟和研究 ,所得结果与实验和理论分析相吻合。

Numerical Investigation on the Dynamic Responses of StructuresIncluding the Effects of Thermal Conductivity

Based on the finite deformation theory,the controlling equations of the impact dynamics of structures with the consideration of thermal conductivity are presented.At the same time,the discrete equations related to the controlling equations are obtained by the variation theory and Galerkin method.Some basic algorithms,such as configuration transfer,simulation process and schematic diagram are introduced in details.At last,the numerical method and code are used in the research on the structures failure induced by long pulse laser,the impact compression deformation and the deformation localization.The numerical results are in good agreement with the theoretical analysis and experimental observations.