加速贮存寿命试验设计方法研究

目的研究加速贮存寿命试验设计的关键要素和基本流程。方法基于国内外加速寿命试验的工程应用成果,深入分析加速寿命试验的原理,针对导弹贮存的薄弱环节,确定试验设计的关键要素,提出试验设计的基本流程,并选取某型发动机喷管设计恒定温度应力的加速贮存寿命试验方案。结果贮存薄弱环节、加速试验模型、加速应力水平和试验周期确定的合理与否,直接影响加速贮存寿命试验的效率和精度,是开展试验设计的关键内容。结论通过工程实例的应用,该方法提出的试验设计的基本原则和基本流程,可以有效指导加速贮存寿命试验方案的制定。

Study of the Design Method of the Accelerated Storage Life Testing

Objective To study key factors and the main designing process of the accelerated storage life testing. Methods Based on the application achievement about the accelerated life testing in the development of missile, the theory of the accelerated life testing was analyzed, the key factors and the main designing process of test designing were presented, and the accelerated storage life testing based on constant stress was designed to estimate the storage life of the engine nozzle, which was focused on the primary vulnerable spots of the missile storage. Results The efficiency and precision of the accelerated storage life testing depended on the reasonable determination of vulnerable spots of storage, models of the accelerated testing, levels of accelerated stresses and test cycles, which were the dominate contents of test design. Conclusion Through case application study, the basic principles and processes proposed in this paper could provide effective guidance for establishment of the accelerated storage life testing program.