机械5

F-500型泥浆泵机架有限元分析 摘要：本文主要是利用三维设计软件UG做出F-500型泥浆泵机架的实体模型，然后对机架的重要部位，如小齿轮轴承座、曲轴轴承座、主墙板、后板、加强筋等进行有限元静态求解及结构模态分析。对主墙板、前后板选用板壳单元PLANE83，曲轴轴承座、小齿轮轴承座等部位使用四面体空间实体单元SOLID187。机架采用Q235材料，弹性模量（EX）为206Mpa，泊松比（PRXY）为0.288。再划分网格得到此模型包括174个面、511条边、339个关键点、104625个节点，56284个单元。通过静态分析得到其应力云图与位移云图，分析云图知最大应力为183.88Mpa，小于许用应力235 Mpa；最大变形为1.6322mm，小于理论最大位移量2.23mm。故模拟分析较保守，即机架的最大应力区也不会发生破坏。通过模态分析机架的前六阶振型图，知振幅最大值为0.36m，位于曲轴轴承座上端，此处刚度最弱。本文拟定以下两个方案：第一增加原加强筋的高度，第二在侧板外侧也焊接加强筋。通过重新建模与模态分析可知，改进后的机架振幅最大值由0.36m变为0.28m，刚度有显着提高。 关键词：F-500泥浆泵机架；有限元；静态分析；模态分析 Fem a
nalysis of F-500 mud pump frame Abstract: This paper mai
nly uses the three-dime
nsio
nal desig
n software UG to make the solid model of the F-500 type mud pump frame, the
n carries o
n the fi
nite eleme
nt static solutio
n a
nd the structural modal a
nalysis to the importa
nt parts of the frame, such as the pi
nio
n housi
ng, the cra
nkshaft beari
ng seat, the mai
nwall plate, the rear plate a
nd the rei
nforci
ng rib. The mai
nwall plate, the fro
nt a
nd rear plate are selected by the shell eleme
nt PLANE83, the cra
nkshaft housi
ng, the pi
nio
n housi
ng a
nd other parts use the Tetrahedro
n Space e
ntity u
nit SOLID187. The frame adopts Q235 material, the elastic modulus(EX) is 206Mpa, Poisso
n's ratio(PRXY) is 0.288. The model is divided i
nto 174 faces, 511 edges, 339 key poi
nts, 104,625
nodes a
nd 56,284 u
nits. By static a
nalysis, the stress cloud picture a
nd the displaceme
nt cloud picture are a
nalyzed, a
nd the maximum stress is 183.88Mpa,which is less tha
n the allowable stress 235 Mpa, the maximum deformatio
n is 1.6322mm, a
nd the maximum displaceme
nt is less tha
n 2.23mm. Therefore, the simulatio
n a
nalysis is more co
nservative, that is, the maximum stresszo
ne of the framewill
not be destroyed. Through the modal a
nalysis frame of the first six-ordervibratio
n patter
n, the maximum k
now
n amplitude is 0.36m, located at the upper e
nd of the cra
nkshaft housi
ng,where the stiff
ness isweakest. I
n this paper, the followi
ng two programs are proposed: first, i
ncrease the height of the origi
nal rei
nforceme
nt, a
nd the seco
nd side of the lateral plate alsowelded rei
nforci
ng te
ndo
ns. By mea
ns of re modeli
ng a
nd modal a
nalysis, the maximum amplitude of the improved frame is cha
nged from 0.36m to 0.28m, a
nd the stre
ngth is improved sig
nifica
ntly. Keywords: F-500 mud pump rack; Fi
nite eleme
nt; Static a
nalysis; Modal a
nalysis 目录 1绪论1 1.1课题背景及研究的意义1 1.2国内国外的研究现状1 1.2.1国外研究现状1 1.2.2国内研究现状2 1.3课题目的与主要研究内容2 1.3.1研究课题的目的2 1.3.2课题研究的主要内容2 2 F-500泥浆泵机架的受力分析4 2.1介质压力5 2.2摩擦力5 2.3质量力5 2.4输入力距和地基反作用力5 2.5小齿轮轴承反作用力8 3有限元介绍与机架建模10 3.1有限元概述及分析过程10 3.1.1初始设置10 3.1.2前处理10 3.1.3求解运算10 3.1.4后处理11 3.2机架建模11 3.2.1机架结构11 3.2.2题意分析11 3.2.3几何模型简化11 3.2.4三维模型的导入13 3.2.5单元类型的选择13 3.2.6检查模型13 4机架结构静态分析14 4.1机架的网格划分14 4.2轴承座载荷加载15 4.3静态求解17 4.4结果分析22 5机架模态分析24 5.1基本理论24 5.2计算结果24 5.3模态分析振型图26 5.4改进后结构模态分析29 5.5本章小结32 6结论34 参考文献35 致谢36 附录37