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防护门在常规武器爆炸荷载作用下将发生反弹效应,门体将承受反弹所引起的较大反向应力,反弹力达到一定程度,铰页和闭锁在反弹力的作用下就会先于门扇主体发生破坏。该文推导了爆炸荷载作用下防护门反弹力的解析计算公式,分析了各种因素,包括:边长比、荷载作用时间、阻尼比、荷载形式以及冲击波负压等对反弹效应的影响规律,结果表明:随着边长比的增大,防护门正向、负向动剪力峰值逐渐减小;阻尼和冲击波负压对防护门的最大正向动力响应影响不大,可以忽略,但对最大负向动剪力影响显著;指数型荷载形式对防护门正向、负向动剪力峰值有一定的影响,但影响不大,可以忽略。
The protective door will rebound under the action of the explosion load of the conventional weapon. The door body will withstand the large reverse stress caused by the rebound, and the rebound force will reach a certain degree. The hinges and the lock will react with the rebound force before the door body Destruction occurred. This paper deduces the analytic formula of the rebound force of the protective door under the explosion load and analyzes various factors including the influence law of the rebound effect such as the side length ratio, the load acting time, the damping ratio, the load form and the shock wave negative pressure, The results show that with the increase of edge length ratio, the peak of dynamic and negative shear force of protective door decreases gradually. The damping and shock negative pressure have little effect on the maximum forward dynamic response of the protective door. The maximum negative shear force has a significant effect. The exponential load forms have some influence on the positive and negative shear forces of protective doors, but have little effect and can be neglected.