摘要
为了研究翻车机主梁钢结构疲劳特性,建立了翻车机的有限元计算模型,确定了其荷载和边界条件。有限元数值模拟了翻车机在卸煤过程中的应力分布特性。数值模拟结果表明,翻车机在卸煤过程中,其关键部位的名义应力幅值最大值为123.8 MPa,以该值作为翻车机疲劳计算的依据,分别基于我国、英国和国际焊接协会(IIW)的钢结构疲劳设计规范,比较分析了主梁钢结构疲劳特性。结果表明,基于IIW、我国和英国的钢结构疲劳设计规范得到的翻车机疲劳寿命分别为289万次、366万次和425万次。3种规范计算所得到的翻车机疲劳寿命最大相对误差为47%。
In order to study the fatigue characteristics of the main beam steel structure of dumper, the finite element calculation model of dumper was established, and its load and boundary conditions were determined. The stress distribution characteristics of dumper during coal unloading were simulated by finite element method. The numerical simulation results show that the maximum nominal stress amplitude of the key parts of the dumper during coal unloading is 123.8 MPa. Taking this value as the basis for the fatigue calculation of the dumper, the fatigue characteristics of the main beam steel structure were compared and analyzed based on the steel structure fatigue design specifications of China, UK and international welding association(IIW). The results show that the fatigue life of the dumper based on the steel structure fatigue design specifications of IIW, China and UK is 2.89 million times,3.66 million times and 4.25 million times respectively. The maximum relative error of the fatigue life of the dumper calculated by the three specifications is 47%.
作者
王志云
于申
李守巨
Wang Zhiyun;Yu Shen;Li Shouju(Institute of Marine and Civil Engineering,Dalian Ocean University,Dalian 116023,China;Dalian University of Technology,Dalian 116024,China)
出处
《煤矿机械》
2022年第8期1-3,共3页
Coal Mine Machinery
基金
国家重点基础研究发展计划资助项目(2015CB057804)。
