具有动态因素的运动机构的运动可靠性与时间有关

IF 3 3区 工程技术 Q2 ENGINEERING, MECHANICAL Probabilistic Engineering Mechanics Pub Date : 2024-03-12 DOI:10.1016/j.probengmech.2024.103598
Xinchen Zhuang, Xin Li, Chang Liu, Tianxiang Yu, Bifeng Song
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引用次数: 0

摘要

运动机构随时间变化的运动可靠性对于优化其运行性能至关重要。之前的研究忽略了动态因素,包括接头的材料劣化和磨损。因此,我们采用包络法对运动机构进行随时间变化的运动可靠性分析,同时考虑动态因素。首先,提出了一种解耦策略,以解耦运动输入和动态因素产生的随时间变化的运动误差。因此,运动可靠性被划分为两个不同的时间参数问题。随后,包络函数被扩展用于解决运动可靠性问题。包络函数中的扩展时间点确定函数(ETPDF)采用一阶方法和主动学习克里金模式进行近似。在找到扩展时点后,可通过多元高斯积分有效地计算随时间变化的可靠性。最后,通过 4 条函数生成机制验证了所提方法的有效性和准确性。
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Time-dependent kinematic reliability of motion mechanisms with dynamic factors

Time-dependent kinematic reliability of a motion mechanism is critical for optimizing its operational performance. Dynamic factors, including material deterioration and wear in the joints, are disregarded in the prior study. As such, the envelope method is employed to undertake time-dependent kinematic reliability analysis of motion mechanisms, accounting for dynamic factors. Firstly, a decoupling strategy is proposed for decoupling the time-dependent motion error stemming from motion input and the dynamic factors. Thus, the kinematic reliability is delineated into two distinct temporal parameter-dependent issues. Subsequently, the envelope function is extended to solve the kinematic reliability. The expansion temporal points determination function (ETPDF) in the envelope function is approximated using a first-order method coupled with an active learning Kriging mode. After the expansion temporal points are found, the time-dependent reliability can be efficiently calculated via a multivariate Gaussian integral. Finally, the effectiveness and accuracy of the proposed method is verified by means of a 4-bar function generating mechanism.

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来源期刊
Probabilistic Engineering Mechanics
Probabilistic Engineering Mechanics 工程技术-工程:机械
CiteScore
3.80
自引率
15.40%
发文量
98
审稿时长
13.5 months
期刊介绍: This journal provides a forum for scholarly work dealing primarily with probabilistic and statistical approaches to contemporary solid/structural and fluid mechanics problems encountered in diverse technical disciplines such as aerospace, civil, marine, mechanical, and nuclear engineering. The journal aims to maintain a healthy balance between general solution techniques and problem-specific results, encouraging a fruitful exchange of ideas among disparate engineering specialities.
期刊最新文献
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