目的 建立一种贴近服役环境剖面的、适用于空射型导弹热防护涂层的试验与寿命评估方法。方法 首先根据导弹寿命期环境剖面分析结果,针对库房贮存和挂飞值班2种主要环境,综合考虑模拟性和加速性构建加速试验剖面和试验载荷谱。在此基础上,按照环境效应等效的原则,借鉴温湿度耦合模型分析确定加速因子。最后根据等效预期年限加速试验后的热防护涂层性能检测结果,以失效阈值为判据对涂层的寿命进行评估。结果 提出了一种包含温度、相对湿度和振动环境因素的热防护涂层加速试验方法,给出了寿命评估相关的数据处理方法。结论 利用该方法评估了某硅橡胶防热涂层在服役环境下寿命不小于10 a,验证了方法的合理性和有效性。
Abstract
The work aims to establish a test and life evaluation method for thermal protective coatings of air-launched missiles that closely resembles the profile of the service environment. Firstly, based on the analysis results of the environmental profile throughout the missiles' life cycle, and considering the two main environments of depot storage and on-duty ferry flight, the accelerated test profile and test load spectrum were constructed by comprehensively considering simulation and acceleration. Then, on this basis, in accordance with the principle of equivalent environmental effects, the acceleration factor was determined by drawing on the temperature and humidity coupling model for analysis. Finally, based on the performance test results of the thermal protective coatings after the equivalent expected life accelerated test, the service life of the coatings was evaluated with the failure threshold as the criterion.An accelerated test method for thermal protective coatings involving environmental factors such as temperature, relative humidity and vibration was proposed, and the data processing methods related to life evaluation were given. Using this method, the life of a certain silicone rubber thermal protective coating in the service environment is evaluated to be no less than 10 years, verifying the rationality and effectiveness of this method.
关键词
空射型导弹 /
热防护涂层 /
服役环境剖面 /
寿命 /
评估方法
Key words
air-launched missile /
thermal protective coating /
service environment profile /
life /
evaluation method
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