锤片式饲料粉碎机架板的有限元分析及拓扑优化  

Finite element analyses and topology optimization of hammer feed grinder frame plate

作　　者：张永杰 徐红梅[1] JAY H Kim 刘爽 王成龙 姜威 ZHANG Yongjie;XU Hongmei;LIU Shuang;WANG Chenglong;JIANG Wei(College of Engineering,Huazhong Agricultural University/Key Laboratory of Agricultural Equipment in Mid-Lower Yangtze River,Ministry of Agriculture and Rural Affairs,Huazhong Agricultural University,Wuhan 430070,China)

机构地区：[1]华中农业大学工学院/农业农村部长江中下游农业装备重点实验室,武汉430070 [2]College of Engineering and Applied Science,University of Cincinnati,2901 Woodside Drive,Cincinnati,US

出　　处：《华中农业大学学报》2019年第5期159-167,共9页Journal of Huazhong Agricultural University

基　　金：国家自然科学基金面上项目(51875230);中央高校基本科研业务费专项(2662019PY082)

摘　　要：以某锤片式饲料粉碎机转子系统架板为研究对象,采用ANSYS Workbench软件对其进行静力学计算与模态分析。结果显示:实际工况下架板的最大总形变量为0.035mm,其发生在中间支撑板上装有8块锤片的2个销轴的安装孔处,架板沿X、Y及Z轴方向上的最大形变量分别为0.035、0.001以及0.016mm,各形变量均较小且与架板实际受力情况相符;架板所受最大应力为165.72MPa,且应力较大的部位仅集中分布在中间支撑板上装有8块锤片的2个销轴的安装孔附近,架板上绝大部分位置的应力值均在36.862MPa以下;架板的一阶固有频率为339.79Hz,且前六阶固有频率均远大于粉碎机的激振频率58.33Hz,但其存在较大的材料冗余。基于此,对架板进行拓扑优化,并根据材料去除率为50%的计算结果对架板结构进行优化设计,优化后架板的质量由最初的46.66kg降至25.85kg。对优化后的架板进行静力学计算与模态分析,结果表明,全新的架板的强度与刚度均足够,且其材料冗余量大幅降低,架板在工作过程中不会发生共振。The static calculation and modal analyses of the frame plate of a hammer feed grinder rotor system were performed with ANSYS Workbench software.The results showed that under the actual working conditions,the maximum total deformation of the frame plate was 0.035 mm,occurring at the mounting holes of the two pin rolls with eight hammers on the intermediate support plate,and the maximum deformation of the frame plate along the X -axis Y -axis and Z -axis was 0.035 mm,0.001 mm and 0.016 mm,respectively.All deformations were small and consistent with the actual load condition of the frame plate.The maximum stress on the frame plate was 165.72 MPa,and the parts with large stress were only concentrated near the mounting holes of the two pin rolls with eight hammers on the intermediate support plate.The stress values at most other positions on the frame plate were below 36.862 MPa.The first-order natural frequency of the frame plate was 339.79 Hz,and its first six order natural frequencies are much higher than the excitation frequency of the hammer feed grinder calculated as 58.33 Hz.But there is a serious material redundancy problem.Based on this,the topology optimization of the frame plate was conducted.The frame plate structure was optimized on the basis of calculating material removal rate as 50%.The quality of the new frame plate was reduced from the initial 46.66 kg to 25.85 kg after optimization.The results of static calculation and modal analyses of the optimized frame plate showed that both the strength and stiffness of the new frame plate were sufficient,and its material redundancy was greatly reduced.The frame plate did not resonate during the working process.It is indicated that the optimized design of the frame plate has desirable effects.

关 键 词：粉碎机架板 静力学计算 模态分析 拓扑优化 静动态特性 结构优化 ANSYS WORKBENCH 

分 类 号：TQ051.9[化学工程]