基于接触有限元的预紧组合机架力能分析  

Mechanical characteristics and energy analysis of a pre-stressed hydraulic press frame by contact finite element method

作　　者：施劲宇[1] 

机构地区：[1]福建工程学院机电工程实训中心,福建福州350108

出　　处：《机电工程》2014年第3期354-357,共4页Journal of Mechanical & Electrical Engineering

基　　金：福建省科技重大专题资助项目(2012HZ0006-2)

摘　　要：针对高频次工作下的陶瓷砖液压机预应力组合机架的整体性以及零部件的疲劳寿命要求高等问题,利用接触有限元方法,建立了能考虑各个零件摩擦接触关系的32 MN液压机预紧组合机架网格模型。通过数值分析结果验证了机架预紧系数的合理性。通过对机架在预紧状态以及工作状态下的VonMises应力场和最大主应力场的分析,确定了机架中易产生疲劳破坏的薄弱区域。分别计算了预紧状态下和工作状态下的机架弹性变形能。研究结果表明,上、下横梁的弯曲弹性变形能是机架能耗的主要部分,该研究结果可以为陶瓷砖液压机的机架结构设计提供有益的参考。Aiming at the integral performances of the fully pre-tightened assemble frame and the fatigue life of the components for a ceramic tile hydraulic press under very high working frequency,finite element model of a 32 MN hydraulic press with the pre-tightened assemble frame was established,where the frictional interaction relations between the parts of frame were considered and simulated.By this combined frame model,the reasonability of pre-stressed factor was verified.The Von-Mises stress and maximum principal stress distributions of the frame of the preloaded status as well as in the working conditions were provided,and the weak areas being prone to fatigue failure were identified.Further more,the elastic deformation energy of the frame from the preloaded status of the working status was calculated respectively,from which the energy consumption of the frame was obtained.The results indicate that the energy consumptions of the upper/lower beams bending deformation is dominance,which provides useful design guidance for the ceramic tile hydraulic press.

关 键 词：接触 预紧组合机架 整体性 陶瓷砖液压机 有限元 

分 类 号：TH131.3[机械工程—机械制造及自动化] O342[理学—固体力学]