负压爆炸载荷和数据采集间隔对弹性开孔板动应力集中的影响

Dynamic stress concentration factor of an elastic plate with a hole subjected to negative transverse explosive loading

1.
Institute of Applied Mechanics, Taiyuan University of technology, Taiyuan 030024, Shanxi, China;
2.
Infrastructure department, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China

摘要: 基于ANSYS 7.0/LS-DYNA程序,对3 m3 m四边简支,厚度0.025 m，中心开有0.3 m0.3 m方孔的弹性板，在正压和负压三角爆炸载荷作用下的应力响应进行了分析，利用能量密度时间分布函数（TDFED）确定了动应力集中因子，并给出其计算步骤。计算结果表明计算总时间和数据采集时间间隔对动应力集中因子影响较大，而负压荷载影响较小。
- 爆炸力学 /
- 动应力集中因子 /
- 能量密度时间分布函数 /
- 横向爆炸载荷 /
- 开孔板 /
- 负压荷载
Abstract: Based on ANSYS 7.0/LS-DYNA, an analysis is performed of the stress response of a simply-supported plate (3 m3 m), with a hole (0.3 m0.3 m), subjected to positive and negative triangularly-distributed pressures. The dynamic stress concentration factor is determined by using time-distributive function of energy density, and the corresponding procedure is provided. It is shown from the result of calculation that the calculation time and the data-collecting time interval have great effects on the factor, but the negative pressure has an insignificant effect on it.
- mechanics of explosion /
- dynamic stress concentration factor /
- time-distributive function of energy density /
- triangularly-distributed explosive load /
- plate with a hole /
- negative pressure