摘要
对辊压机核心部件——挤压辊的疲劳强度和寿命分别进行理论校核与有限元模拟分析。采用安全系数法和ANSYS软件对辊轴可能的危险截面进行理论分析,且计算与数值模拟的结果显示,危险轴颈部位存在较大应力集中,是辊轴断裂的主要原因。通过修改有限元模型的结构尺寸,获得不同条件下危险截面上的最大应力和应力集中系数,确定最终的改进方案,并进行结构疲劳分析。结果证明,改进后的方案满足疲劳要求,提高了安全系数。
The fatigue strength and the fatigue life of the squeeze roller used in the roll squeezer have been checked theoretically and analyzed by FEM. Locate and analyze theoretically the potential dangerous sections with the method of safety factor and ANSYS software, and theoretical and numerical modeling results show the stronger stress concentration at dangerous sections is the main failure cause. Modifying the model size, Maximum stress and stress concentration coefficients at different conditions are calculated, the ultimate optimized model is determined, and its structural fatigue life is analyzed. The results show that the optimized model is feasible and has higher safety property.
出处
《矿山机械》
北大核心
2009年第19期70-72,共3页
Mining & Processing Equipment
基金
山东省自然科学基金资助项目(Y2007F34)
关键词
疲劳寿命
挤压辊
有限元
安全系数
fatigue life
squeeze roller
finite element
safety factor
