热刀式压紧释放装置释放可靠性验证试验及评估方法

摘要

This paper introduces the functions and the principles of the hold-down and release mechanism actuated by a thermal knife element,and gives the using times of the key element as the release reliability characteristic parameter of the mechanism.Based on the hypothesis of the using times of the thermal knife element following Poisson distribution,and the release reliability validation tests and evaluation methods for the hold-down and release mechanism are put forward,including test method choosing,determination of test state,test program,failure criterion and reliability assessment method.An application example of the method is shown.By the reliability evaluation test method,the release reliability of the hold-down and release mechanism actuated by a thermal knife element could be verified.%介绍热刀式压紧释放装置的功能及工作原理,确定该型压紧释放装置的释放可靠性特征量为核心元件＂热刀＂的可使用次数。基于＂热刀＂元件使用次数服从泊松分布的基本假设,提出该型压紧释放装置的释放可靠性验证试验及评估方法,包括选择试验方法、确定试验件的状态、试验条件、试验程序、故障判据及可靠性评估方法,并给出了应用示例,可为其释放可靠性评估提供技术途径。