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工程设计学报
工程设计学报  2016, Vol. 23 Issue (2): 160-165    DOI: 10.3785/j.issn.1006-754X.2016.02.009
建模、分析、优化和决策     
刨头间隙碰撞载荷下滑架体疲劳寿命试验分析
毛君1, 张瑜1, 刘占胜2, 李国平3, 陈洪月1
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;
3. 中煤张家口煤矿机械有限责任公司, 河北 张家口 076250
Fatigue life test analysis of sliding framework under clearance impact load of plough
MAO Jun1, ZHANG Yu1, LIU Zhan-sheng2, LI Guo-ping3, CHEN Hong-yue1
1. College of Mechanical Engineering, Liaoning Technical University, Fuxin 123000, China;
2. China National Coal Mining Equipment Co., Ltd., Beijing 100011, China;
3. China Coal Zhangjiakou Coal Mining Machinery Co., Ltd., Zhangjiakou 076250, China
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摘要： 针对刨煤机中部槽滑架体在工作过程中出现的疲劳断裂现象,采用理论与试验相结合的方法,基于Winkler弹性地基接触模型,建立了刨头三自由度碰撞振动动力学模型.通过点到直线的距离算法作为检验碰撞的准则,构造了刨头与滑架接触碰撞判别条件.采用数值方法进行求解,得到刨头与滑架各点的最大碰撞力,并以此作为疲劳试验载荷,对中部槽滑架体进行疲劳寿命试验,得到了滑架体的疲劳寿命.研究结果表明:滑架体在最大碰撞力作用下,在立板前端产生初始裂纹,在发生静强度失效时,失效点倾向于立板后部下端.研究结果对提高滑架体疲劳强度提供了理论依据.
关键词： 刨煤机;  接触碰撞;  滑架体;  疲劳断裂    
Abstract: To solve the fatigue break phenomenon on the middle part of sliding framework of coal planer happened during the working process, the 3-DOF crash dynamic model of plough was established based on the Winkler model by combining theory and experiment together. Test criterion of contact-impact between plow head and sliding framework was established by the collision detection method of the arithmetic of the distance between a point and a line. The maximum impact forces of plow head and sliding framework on each point were obtained by numerical methods,and were used as the load of fatigue test. The fatigue test of middle trough sliding framework was executed. Fatigue life of sliding framework was obtained. The results showed that initial crack appeared at the forepart of standing plate when sliding framework was under the maximum impact force and the failure point tended to appear at the bottom of standing plate when static strength became invalid. The results provide theoretical basis for the improvement of fatigue strength of sliding framework.
Key words: plough    contact-impact    sliding framework    fatigue fracture
收稿日期: 2015-07-03 出版日期: 2016-04-28
CLC:  TD421.62  
基金资助:

国家自然科学基金资助项目(51304105);辽宁省教育厅创新团队资助项目(LT2013009);辽宁省教育厅科学研究一般项目(L2012118).
通讯作者: 张瑜,辽宁朝阳人,博士研究生,E-mail:z13464238735@sina.com.     E-mail: z13464238735@sina.com
作者简介: 毛君(1960—),男,满族,辽宁鞍山人,博士,教授,博士生导师,从事机械设计及仿真、电机一体化等研究,E-mail:maojun0828@263.net.
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引用本文:

毛君, 张瑜, 刘占胜, 李国平, 陈洪月. 刨头间隙碰撞载荷下滑架体疲劳寿命试验分析[J]. 工程设计学报, 2016, 23(2): 160-165.

MAO Jun, ZHANG Yu, LIU Zhan-sheng, LI Guo-ping, CHEN Hong-yue. Fatigue life test analysis of sliding framework under clearance impact load of plough. Chinese Journal of Engineering Design, 2016, 23(2): 160-165.

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https://www.zjujournals.com/gcsjxb/CN/10.3785/j.issn.1006-754X.2016.02.009    或    https://www.zjujournals.com/gcsjxb/CN/Y2016/V23/I2/160

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