面向导弹延寿的冲压发动机加速贮存试验方法

目的更为真实地反映自然贮存环境对某型导弹冲压发动机寿命的影响,研究综合环境应力加速贮存试验方法。方法为了符合自然环境的年变化规律,设计1个周期的综合环境应力加速贮存试验能够等效产品自然贮存1年,每个周期的加速贮存试验包括低温冷冻、高低温交变加速、高温高湿加速、高温老化4部分。采用加速模型估计出每段加速试验的加速因子,进而依据自然贮存环境测试数据折算出加速试验谱。结果所提方法提高了冲压发动机加速贮存试验的科学性与准确性。结论研究工作为高效完成导弹冲压发动机贮存延寿任务提供了可行的工程方法。

Accelerated Storage Test Method of Ramjet for Life Extension of Missile

Objective To reflect the effect of natural storage environment on the life of a missile ramjet and study the accelerated storage test method based on comprehensive environmental stresses. Methods To accord with the annual changing rule of natural environment, a one-cycle comprehensive environmental stress accelerated storage test was designed to be equivalent to the natural storage during one year. The accelerated storage test of each circle contained four parts: low temperature refrigeration, high-low temperature alternated acceleration, high temperature and high humidity acceleration and high temperature acceleration. The acceleration factor for each environmental stress was estimated via the acceleration model, and then the acceleration test spectrum was transformed from the collected data of natural storage environment. Results The proposed method improved the science and accuracy of accelerated storage test for ramjet. Conclusion The research work provides an effective engineering approach for efficient life extension of ramjet.