打磨机器人的打磨头螺栓组系统可靠性分析

doi:10.12068/j.issn.1005-3026.2023.12.006

东北大学学报（自然科学版） ›› 2023, Vol. 44 ›› Issue (12): 1712-1719.DOI: 10.12068/j.issn.1005-3026.2023.12.006

打磨机器人的打磨头螺栓组系统可靠性分析

黄贤振^1,2，张安星¹，孙楷铂¹

(1. 东北大学机械工程与自动化学院，辽宁沈阳110819； 2. 东北大学航空动力装备振动及控制教育部重点实验室，辽宁沈阳110819)

发布日期:2024-01-30
通讯作者: 黄贤振
作者简介:黄贤振(1982-)，男，山东定陶人，东北大学教授，博士生导师.
基金资助:
国家自然科学基金资助项目(51975110); “兴辽英才计划”项目(XLYC1907171); 中央高校基本科研业务费专项资金资助项目(N2003005，N21003005).

Reliability Analysis of Grinding Head Bolt Group System of Grinding Robot

HUANG Xian-zhen^1,2， ZHANG An-xing¹， SUN Kai-bo¹

1.School of Mechanical Engineering & Automation， Northeastern University， Shenyang 110819， China; 2.Key Laboratory of Vibration and Control of Aero-Propulsion Systems of Ministry of Education， Northeastern University， Shenyang 110819， China.

Published:2024-01-30
Contact: HUANG Xian-zhen
About author:-
Supported by:
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摘要/Abstract

摘要： 在使用螺栓组连接的整体结构中，螺栓组的可靠性直接影响整体结构的可靠性.传统的螺栓组可靠性分析方法认为螺栓参数是确定的，而在实际工况中螺栓参数具有一定的随机不确定性，从而产生较大误差.为准确评估螺栓组的可靠性，以某打磨机器人的打磨头螺栓组为例，建立打磨头有限元分析模型并进行静力学分析，通过螺栓连接实验验证螺栓连接有限元模型的准确性；将螺栓组视为系统，考虑螺栓参数随机性的影响，以螺栓最大应力值是否超过屈服极限为判别条件建立极限状态函数，结合Kriging模型拟合方法进行可靠性分析，探究系统可靠度随螺栓预紧力的变化规律.结果表明，螺栓组系统可靠度受到随机因素的影响，由多个螺栓共同决定，并随螺栓预紧力增大而减小.

关键词: 机械设计；螺栓组连接；静力学；系统可靠性；Kriging模型

Abstract: In the whole structure connected by bolt group， the reliability of the bolt group directly affects the reliability of the whole structure. The traditional reliability analysis method of the bolt group considers that the bolt parameters are determined， but in actual working conditions， the bolt parameters are uncertain， resulting in a large error. In order to accurately evaluate the reliability of the bolts group， taking a grinding robot grinding head bolt group as an example， a finite element analysis model of the grinding head is establisted. This model is used for static analysis. The accuracy of the bolt connection finite element mesh model is verified by the bolt connection experiment. The bolt group is regarded as a system， and the influence of the bolt parameter randomness is considered. The limit state function is established based on whether the maximum stress value of the bolt exceeded the yield limit. The reliability analysis is carried out by combining the Kriging model fitting method， and then the variation rule of the system reliability with the bolt preload is explored. The results show that the reliability of the bolt system is affected by random factors and determined by multiple bolts， and decreases with the increase of the bolt preload.

Key words: machine design; bolt group connection; statics; system reliability; Kriging model

中图分类号:

TH133.3

黄贤振，张安星，孙楷铂. 打磨机器人的打磨头螺栓组系统可靠性分析[J]. 东北大学学报（自然科学版）, 2023, 44(12): 1712-1719.

HUANG Xian-zhen， ZHANG An-xing， SUN Kai-bo. Reliability Analysis of Grinding Head Bolt Group System of Grinding Robot[J]. Journal of Northeastern University(Natural Science), 2023, 44(12): 1712-1719.

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打磨机器人的打磨头螺栓组系统可靠性分析

Reliability Analysis of Grinding Head Bolt Group System of Grinding Robot

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