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THE NUMERICAL SIMULATION OF INFLUENCE OF AN INTERNAL BLAST CAVITY EFFECT ON OVERPRESSURE FOR A STRUCTURE
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摘要: 采用Euler-FCT和两步模拟方法,考虑了爆炸波的多次反射,在进行了数值模拟精度研究和网格验证的基础上,模拟了长方体结构内部爆炸的压强场分布,研究了门、窗空洞效应、窗户的窗台高度和大小对于爆炸波传播的影响,并对结果进行了分析。空洞对爆炸波的传播有较大影响,不能忽略;窗户大小对爆炸波传播有一定影响,而窗户的窗台高度对爆炸波传播的影响相对较小。Abstract: Based on the verification of the accuracy of numerical simulation and grid size,it was simulated the internal explosion of an cuboid using Euler-FCT method and two-step simulation,taking account of multiple reflections.It was studied the cavity effect of doors and windows,the effect of the windowsill high and window size on blast wave propagation,and also analysed the result.Cavity effect has a great impact on blast wave propagation which can not be ignored.Window size has a certain influence on blast wave propagation,and the effect of windowsill height is relatively small.
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Key words:
- blast wave /
- structure interior /
- cavity effect /
- Autodyn /
- numerical simulation
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