Response surface test simulation of locking system reliability considering kinematic pair wear evolution

考虑运动副磨损的锁止系统可靠性响应面试验仿真

¹ School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China
² School of Mechatronic Engineering, Xi'an Technological University, Xi'an 710021, China
³ Chengdu Lihang Technology Co., Ltd, Chengdu 610091, China

Received: 19 July 2023

Abstract

The concentrated load endured by the locking system during the weapon mounting and release procedures may lead to mechanical wear in hinges and kinematic pairs, thereby influencing the functional reliability of the weapon rack mechanism system. This study aims to investigate the impact of kinematic pair wear evolution on the reliability of the locking system. Firstly, a rigid-flexible coupling multi-body dynamics model of the locking system was established to simulate the dynamic behaviors of the rack under different loading conditions. Moreover, the wear amounts of the main kinematic pairs were precisely calculated by the Archard wear model to provide data support for the subsequent reliability analysis. Subsequently, the response surface method was employed to design the orthogonal experiments for the reliability analysis of the locking system, and the reliability degradation law of the locking system within the design lifespan was obtained through the Monte Carlo method simulation. The research findings indicate that the wear of kinematic pairs has a significant effect on the motion function and accuracy of the mechanism. The motion reliability of the mechanism can be maintained above 99% within the design lifespan. Nevertheless, when the usage time exceeds twice the design lifespan, the reliability drops significantly to approximately 85%, and the influence degrees of different wear positions on the reliability were obtained through the sensitivity analysis. The research results not only provide a scientific basis for the optimal design of the locking system but also offer a novel perspective and method for the reliability assessment and maintenance strategy of the weapon rack locking system.

摘要

锁止系统在武器挂载与投放过程中承受的集中载荷可能导致铰链和运动副产生机械磨损, 进而影响武器挂架机构系统的功能可靠性, 文中重点探讨运动副磨损演化对锁止系统可靠性的影响。构建了锁止系统的刚柔耦合多体动力学模型, 以模拟挂架在不同承载工况下的动态行为。通过Archard磨损模型精确计算了主要运动副的磨损量, 为后续可靠性分析提供数据支撑。采用响应面法设计了锁止系统可靠性分析的正交试验, 并通过蒙特卡罗法模拟得到了锁止系统在设计寿命内的可靠性退化规律。研究结果表明运动副磨损对机构运动功能和精度影响显著, 在设计寿命内机构的运动可靠度可维持在99%以上。然而, 当使用时间超过设计寿命2倍时, 可靠度显著下降至约85%, 通过灵敏度分析得到了不同磨损位置对可靠性的影响程度。研究结果不仅为锁止系统的优化设计提供了科学依据, 也为武器挂架锁止系统的可靠性评估和维护策略提供了新的视角和方法。