摘要
刀盘是岩石掘进机的关键部件,对掘进机的掘进性能有很大的影响.建立了掘进机刀盘的几何和数学模型,用有限元法对掘进机刀盘的应力、应变和振动特性进行了分析.研究结果发现:随着载荷的增大,应力和应变值增大;刀盘中心位置是刀盘应力和应变的集中处,其值都处在许用值范围内;模态分析发现,刀盘第一阶固有频率远大于刀盘工作中的转速,避免了刀盘出现共振现象.研究结果对优化刀具系统结构、延长刀具系统的寿命具有积极意义.
As a critical component of rock excavators, the cutter-plate delivers significant impacts on the excavation performance. By establishing the geometric and mathematical models using finite element method, relevant stresses, strains and vibration properties are analyzed. With the increase of loading, stress and strain values increase. Moreover, the stress and strain concentrations, the values of which are within the permitted ranges, occur at the central position of cutter-plate. From the modal analysis, it is found that the first-order inherent frequency is much higher than the cutter-plate rotary speed to avoid the reso- nance. Therein, this approach is beneficial to the optimization of cutter system structure and the expansion of cutter lifecycle.
出处
《中国工程机械学报》
2012年第2期171-176,共6页
Chinese Journal of Construction Machinery
基金
“十二五”计划资助项目(2011BAJ021305)
科技部科技人员服务于企业行动资助项目(2009GJB00025)
住房和城乡建设部科技资助项目(2010-K6-11)
辽宁省教育厅重点实验室基金资助项目(LS2010129)
辽宁省教育厅创新团队资助项目(LT2010087)
2010年辽宁省科学技术计划资助项目(2010220040)
关键词
刀盘
应力
应变
模态分析
cutter-plate
stress
strain
modal analysis
