椭圆封头圆柱形爆炸容器动力响应的数值模拟

Numerical simulation on dynamic response of the cylindrical explosion containment vessel with an elliptical cover

1.
Institute of Chemical Machinery and Process Equipment, Zhejiang University, Hangzhou 310027, Zhejiang, China

摘要: 采用显示非线性动力有限元软件LS-DYNA，在不同TNT当量下对椭圆封头圆柱形爆炸容器进行了数值模拟。模拟结果表明：对椭圆封头与圆筒组合而成的理想结构，爆心环面的应变在初始响应阶段就达到了最大值，并且其值大于筒体上其他点的最大应变；实际结构中法兰对爆炸容器的动力响应有很大的影响，当法兰的质量超过一定值之后，容器爆心环面会产生应变增长现象。在容器的设计工作中要加强容器的爆心环面并适当地选择法兰。
- 爆炸力学 /
- 动力响应 /
- 非线性动力有限元 /
- 爆炸容器 /
- 应变增长
Abstract: The dynamic response of a cylindrical explosion containment vessel with the elliptical cover under four kinds blast loading was studied using explicit finite element code LS-DYNA. The results show that for the ideal structure that only include a cylinder and an elliptical cover, the strain of the points on the plane which across the center of the vessel has become the largest during the initial stage. When adding a certain mass flange on the vessel, the strain growth phenomenon has shown up on the above points. The strain growth and the mass of the flange are the factors that must be considered when designed.
- mechanics of explosion /
- dynamic response /
- explicit finite element /
- cylindrical explosion containment vessel /
- strain growth