Under internal blast loading, the response of a beam or plate is highly correlated with the phenomenon of saturated impulse, which governs the deflection of the structure. This paper aims to investigate the phenomenon of saturated impulse for fully clamped rectangular plates subjected to internal blast loading. Based on the rigid, perfectly plastic assumption, the relationship between saturation duration and saturation deflection is derived. Influences of the peak shock wave, the duration of shock wave and the peak quasi-static pressure loading on saturation duration and saturation deflection are discussed. It is found that there is a critical duration for the internal blast impulse to reach saturation, and beyond this duration, the deflection of plate will no longer increase as the loading increases further. The saturation deflection and saturation duration both exhibit regular variation patterns with the changes of the dimensionless peak shock wave, the duration of shock wave and the peak quasi-static pressure loading.

在内部爆炸载荷下，梁或板的响应与饱和脉冲现象高度相关，饱和脉冲控制结构的挠度。本文旨在研究受内部爆炸载荷作用的全夹紧矩形板的饱和脉冲现象。基于刚性、完美塑性假设，导出饱和持续时间和饱和挠度之间的关系。讨论了峰值冲击波、冲击波持续时间和峰值准静压力载荷对饱和持续时间和饱和挠度的影响。发现内部爆炸脉冲达到饱和有一个临界持续时间，超过这个持续时间，随着载荷的进一步增加，板的挠度将不再增加。