基于PHI2的桥式起重机结构时变可靠性分析

doi:10.16265/j.cnki.issn 1003-3033.2021.07.018

中国安全科学学报 ›› 2021, Vol. 31 ›› Issue (7): 130-136.doi: 10.16265/j.cnki.issn 1003-3033.2021.07.018

基于PHI2的桥式起重机结构时变可靠性分析

刘玉珍¹, 杨瑞刚¹ 教授, 赵广立², 景玮宸¹, 马晓星³

1 太原科技大学机械工程学院,山西太原 030024;
2 山西省特种设备监督检验研究院,山西太原 030024;
3 林州市职业教育中心机电信息学院,河南安阳 456550

收稿日期:2021-04-11 修回日期:2021-06-06 出版日期:2021-07-28 发布日期:2022-01-28
作者简介:刘玉珍 (1996—),女,山西临汾人,硕士研究生,研究方向为大型机械装备结构可靠性与寿命评估。E-mail:1459206342@qq.com。
基金资助:
山西省回国留学人员科研项目(2015-088);山西省留学回国人员科技活动项目择优项目([2016]97)。

Analysis on time-varying reliability of bridge crane structure based on PHI2

LIU Yuzhen¹, YANG Ruigang¹, ZHAO Guangli², JING Weichen¹, MA Xiaoxing³

1 School of Machinery Engineering, Taiyuan University of Science & Technology, Taiyuan Shanxi 030024, China;
2 Shanxi Special Equipment Supervision and Inspection Institute, Taiyuan Shanxi 030024, China;
3 School of Mechanical and Electrical Information, Linzhou Vocational Education Center, Anyang Henan 456550, China

Received:2021-04-11 Revised:2021-06-06 Online:2021-07-28 Published:2022-01-28

摘要/Abstract

摘要： 为探究时间累积效应对起重机失效概率的影响,提出基于改进的PHI2的起重机金属结构时变可靠性分析方法。以桥式起重机为例,首先,分析起重机金属结构受力,选取与材料许用应力以及结构许用刚度差值最小的危险点进行结构数值分析;其次,用响应面法(RSM)近似构造功能函数;最后,通过改进的PHI2方法求得上穿率,从而获得起重机金属结构随时间累积的失效概率。结果表明:考虑时间累积效应的可靠性指标明显低于未考虑时间累积效应的可靠性指标。

关键词: 桥式起重机, 时变可靠性, 响应面法(RSM), 金属结构, PHI2方法

Abstract: In order to explore impact of cumulative effect of time on cranes' failure probability, a time-varying reliability analysis method for crane metal structures based on improved PHI2 was proposed. With bridge crane as an example, its metal structure's stress was firstly analyzed, and dangerous point which featured the smallest difference with allowable stress of material and allowable rigidity of structure was selected for structural numerical analysis. Secondly, RSM was utilized to construct a function approximately. Finally, outcrossing rate was calculated by using improved PHI2 method so as to obtain cumulative failure probability of metal structure. The results show that reliability index considering cumulative effect of time is significantly lower than that without considering it.

Key words: bridge crane, time-varying reliability, response surface method (RSM), metal structure, PHI2 method

中图分类号:

X952

刘玉珍, 杨瑞刚, 赵广立, 景玮宸, 马晓星. 基于PHI2的桥式起重机结构时变可靠性分析[J]. 中国安全科学学报, 2021, 31(7): 130-136.

LIU Yuzhen, YANG Ruigang, ZHAO Guangli, JING Weichen, MA Xiaoxing. Analysis on time-varying reliability of bridge crane structure based on PHI2[J]. China Safety Science Journal, 2021, 31(7): 130-136.

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基于PHI2的桥式起重机结构时变可靠性分析

Analysis on time-varying reliability of bridge crane structure based on PHI2

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