采煤机机身联接螺栓强度分析与疲劳寿命仿真

doi:10.16182/j.issn1004731x.joss.201707012

系统仿真学报 ›› 2017, Vol. 29 ›› Issue (7): 1481-1488.doi: 10.16182/j.issn1004731x.joss.201707012

采煤机机身联接螺栓强度分析与疲劳寿命仿真

郝志勇¹, 雷耀龙¹, 毛君¹, 袁智²

1. 辽宁工程技术大学机械工程学院,辽宁阜新 123000;
2. 中国煤矿机械装备有限责任公司,北京 100011

收稿日期:2016-11-02 发布日期:2020-06-01
作者简介:郝志勇(1979-)，男，山西代县，博士，副教授，硕导，研究方向为机械结构强度分析和机械优化设计。
基金资助:
国家自然科学基金(51674133，51404135)，国家973 计划课题(2014CB046301)，辽宁省教育厅项目(L2015210)

Intensity Analysis and Fatigue Life Simulation for Connecting Bolt of Shearer Machine Body

Hao Zhiyong¹, Lei Yaolong¹, Mao Jun¹, Yuan Zhi²

1. Mechanical Engineering College of Liaoning Technical University, Fuxin 123000, China;
2. China National Coal Mining Equipment Company, Beijing 100011, China

Received:2016-11-02 Published:2020-06-01

摘要/Abstract

摘要： 结合采煤机力学特性测试实验,使用合并未知量,多次求解的方式对采煤机左牵引部空间力学模型超定方程进行求解,获得机身联接螺栓剪切载荷谱;利用获得的机身联接螺栓剪切载荷谱进行功率谱密度分析,使用雨流计数法对载荷谱进行编制,获得载荷谱频域特性与时域连续特性;结合螺栓载荷谱,通过静载分析与疲劳仿真分析,并考虑间隙影响条件,分析结果显示螺栓剪切疲劳起裂区域为螺纹配合起始部分,疲劳寿命约为5 625.68 h;仿真结果证明,在一定条件下仿真模拟可以达到反映真实条件下采煤机螺栓剪切疲劳损伤演化过程的目的。

关键词: 采煤机, 机身联接螺栓, 实验测试, 疲劳寿命

Abstract: To obtain the cutting load spectrum of themachine body connecting bolt, the method of merging unknown quantities and multi calculation combined with the test experiments of shear mechanical properties was used to solve the overdetermined equations of shearer left haulage unit spatial mechanical model The cutting load spectrum of the machine body connecting bolt was taken to run PSD analysis, and the rainflow counting method was used to script the load spectrum. The frequency domain characteristics and time domain continuation characteristics were therefore obtained. The static analysis and fatigue life simulation analysis combined with the bolt load spectrum and the consideration of the impact condition of clearance, indicate that the initial cracking region for bolt cutting fatigue is the preliminary part of the threaded fit, the fatigue life of machine body connecting bolt is 5 625.68 hours. The simulation results show that under specific conditions the simulation can reach the goal of reflecting the cutting fatigue damage evolutionary process of the connecting bolt of shearer machine under real conditions.

Key words: shearer, connecting bolt of machine body, testing experiment, fatigue life

中图分类号:

TD421

郝志勇, 雷耀龙, 毛君, 袁智. 采煤机机身联接螺栓强度分析与疲劳寿命仿真[J]. 系统仿真学报, 2017, 29(7): 1481-1488.

Hao Zhiyong, Lei Yaolong, Mao Jun, Yuan Zhi. Intensity Analysis and Fatigue Life Simulation for Connecting Bolt of Shearer Machine Body[J]. Journal of System Simulation, 2017, 29(7): 1481-1488.

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采煤机机身联接螺栓强度分析与疲劳寿命仿真

Intensity Analysis and Fatigue Life Simulation for Connecting Bolt of Shearer Machine Body

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