CAJ | 학술논문

针对固体火箭发动机药柱裂纹扩展机理及其危险性研究的复杂性,选择发动机工作过程中裂纹失稳扩展作为发动机判废的标准,采用实验测量和数值仿真的方法,确定出了不同贮存期某型固体火箭发动机在点火发射过程中,其药柱星角处横向贯穿楔形裂纹发生失稳扩展的临界深度,应用数理统计分析,给出了含该型裂纹的发动机安全工作的裂纹深度阈值曲线,从而为制订发动机的判废标准提供理论依据.
침대고체화전발동궤약주렬문확전궤리급기위험성연구적복잡성,선택발동궤공작과정중렬문실은확전작위발동궤판폐적표준,채용실험측량화수치방진적방법,학정출료불동저존기모형고체화전발동궤재점화발사과정중,기약주성각처횡향관천설형렬문발생실은확전적림계심도,응용수리통계분석,급출료함해형렬문적발동궤안전공작적렬문심도역치곡선,종이위제정발동궤적판폐표준제공이론의거.
Aiming at the complexity of the propagation mechanism of the crack in solid-rocket-motor grain and its risk research, the unstable crack propagation was selected as the criterion of motor failure-judgment during its working. With experiment measure-ment and numerical simulation methods, the critical depths of unstable propagation about the wedge cracks which traversed through its grain projection were determined during the ignition of the solid rocket motor variation with different storage period. The threshold values of crack depths in grains during the safety working of motor were determined by use of mathematical statistics analysis, which offered the theoretical basis for the institution of motor failure-judgment criterion.