It is a very complicated problem that is not only related to the shockwaveinteraction, but also to the shape, size and natural frequency of the ventilation structure.
它不仅与冲击波的作用情况有关，而且与通风构筑物的形状、大小、自振周期等因素有关。
2
By using the pressure deflection diagram, the flow structure for type 4 shockwaveinteraction pattern is analysed, and we explains why the surface pressure is very high in this case.
借助于激波极曲线，对第4类激波干扰结构进行了分析，解释了干扰引起物面压力增高的原因。
3
This paper is intended to study the complex wave structure generated in gas and starch dust bulk while interaction of shockwave with starch dust bulk through experiment and theory analysis.