基于应力-强度干涉模型的分离螺母可靠性分析  

Reliability of Separation Nuts Based on Stress-Intensity Interference Model

作　　者：牛磊 董海平[1] 赵象润 李朝振 严楠[1] NIU Lei;DONG Hai-ping;ZHAO Xiang-run;LI Chao-zhen;YAN Nan(State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China;Institute of Pyrotechnics Technology,Liaoning North Huafeng Special Chemical Co.,Ltd.,Liaoning Fushun 113003,China;Academy of Opto-electronic,China Electronic Technology Group Corporation,Tianjin 300308,China)

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081 [2]辽宁北方华丰特种化工有限公司火工品技术研究所,辽宁抚顺113003 [3]中国电子科技集团公司光电研究院,天津300308

出　　处：《装备环境工程》2022年第12期8-13,共6页Equipment Environmental Engineering

摘　　要：目的提出一种基于应力强度干涉模型的分离螺母的分离可靠性分析方法。方法首先,建立分离螺母机构分离动力学模型和极限状态函数。然后,在考虑工作载荷、几何尺寸和药剂燃烧参数等参数不确定性的基础上,建立分离螺母不同分离阶段的基于应力-强度干涉模型的可靠性模型。最后,对分离螺母进行可靠性和灵敏度分析,量化工作载荷、几何尺寸和火药燃烧参数对分离螺母机构分离可靠性的重要性排序。结果影响可靠性的主要参数依次为火药力、装药密度和预紧力。结论该方法能够准确描述不确定性因素对分离螺母分离过程可靠性的影响,提升分离螺母机构分离可靠性定量分析的精度和效率,可为分离螺母的精细化设计提供支撑。The work aims to propose a method for reliability analysis of separation nuts based on stress-intensity interference model.Firstly,a separation dynamics model of the separation nut mechanism was established.Then,based on considering the uncertainty of parameters such as working load,geometric size and propellant combustion parameters,a reliability model based on stress-intensity interference model for different separation stages of the separation nuts was established.Finally,the reliability and sensitivity of the separation nuts were analyzed,and the importance of the working load,geometric size and gunpowder combustion parameters on the separation reliability of the separation nut mechanism was quantified.The most important parameters affecting the reliability were powder force,charge density and preload.The example shows that the method can accurately describe the effects of uncertain factors on the reliability of separation nuts during separation,improve the accuracy and efficiency of the quantitative analysis on the separation reliability of the separation nut mechanism,and provide support for fine design of separation nuts.

关 键 词：分离螺母可靠性 应力-强度干涉模型 可靠性分析 灵敏度 

分 类 号：V448[航空宇航科学与技术—飞行器设计]