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本文用弹性——塑性和简单的不稳定性理论预估火箭发动机壳体的爆破压力。而材料的特性经验地用修正的Ramberg-Osgood的公式表示。当发动机壳体达到塑性不稳定时,就发生爆破。对发动机壳体的静态和动态两种情况进行了分析。在静态情况下,推出了爆破压力方程的显式。对于飞行状态,爆破压力是不显示地从一个超越方程的根而得出。分析计算基于如下假设:在发动机壳体最薄的断面产生破裂,如在平行的部位或圆盖形的端部。这个理论得到了验证,与试验结果极为吻合。对于特定的发动机壳体而言,预估的爆破压力的误差在3％之内。在专用设备上静态模拟飞行条件。
In this paper, the burst pressure of the rocket engine case is estimated by the theory of elasticity-plasticity and simple instability. The properties of the material are empirically represented by the modified Ramberg-Osgood formula. Blasting occurs when the motor housing is plastically unstable. The static and dynamic cases of the engine case are analyzed. Under static conditions, an explicit formula for the burst pressure is introduced. For flight conditions, the bursting pressure is implicitly derived from a root that goes beyond the equation. The analysis is based on the assumption that a rupture occurs in the thinnest section of the engine casing, such as in a parallel or dome-shaped end. This theory has been verified, and the test results are very consistent. The estimated burst pressure error is within 3% for a particular engine case. Statically simulate flight conditions on dedicated equipment.