资源预览内容
第1页 / 共8页
第2页 / 共8页
第3页 / 共8页
第4页 / 共8页
第5页 / 共8页
第6页 / 共8页
第7页 / 共8页
第8页 / 共8页
亲,该文档总共8页全部预览完了,如果喜欢就下载吧!
资源描述
牟晋勇 机械085 2007071275一.实验目的:综合训练和培养学生利用有限元技术进行机械系统分析和设计的能力,独立解决本专业方向实际问题的能力;增强对ansys软件的认识和操作能力;进一步提高学生创新设计、动手操作能力,为将来所从事的机械设计打下坚实的基础。二、实验环境1.硬件:方正计算机1台2.软件:CAE软件ANSYS三、实验内容(任务及要求):主要训练学生对机械结构问题分析规划的能力,能正确利用有限元分析软件ANSYS建立结构的有限元模型,合理定义单元、分析系统约束环境,正确加载求解,能够提取系统分析结果。通过实验分析使学生了解和掌握有限元技术辅助机械系统设计和分析的特点,推动学生进行创新设计。本组数据:数据项学生2a(m)12P(N)1.99e5N 2.3e4N1500N左端集度(N/m)0右端集度q0(N/m)1000弹性模量(GPa)200帕松比0.3截面积0.000314抗弯惯性矩0.020833截面高度0.4m四、实验步骤:(一)问题分析:塔机平衡臂主要载荷包括:平衡臂的自重,风载荷,平衡重,起升机构,电机重。结构为背向两槽钢用角钢焊接,上表面有拉杆的一个立体机构。因此,将实验模型简化为槽钢与角钢搭接,拉杆与槽钢上表面耦合的结构。(二)实验过程:1)设置计算类型:ANSYS Main Menu: Preferences select Structural (结构分析) OK2)选择单元类型ANSYS Main Menu: Preprocessor Element Type Add/Edit/Delete Add select shell63 applyselect link 1OKClosereal constantaddshell63定义厚度set1为0.0105ok同理定义厚度set2为0.018,set3为0.01addlink1定义拉杆截面积set4为0.0003143)定义材料参数ANSYS Main Menu: Preprocessor Material Props Material Models Structural Linear ElasticIsotropicinput EX:2.06 e11, PRXY:0.3 OKPreprocessor Material Props Material Models Structural Densityinput 7850 OK4)生成几何模型(A) 生成槽钢生成特征点:Main Menu: Preprocessor Modeling Create Keypoints In Active CS依次输入坐标值(-0.32,0,0)(-0.42,0,0)(-0.42,0.4,0)(-0.32,0.4,0)(0.32,0,0)(0.42,0,0)(0.42,0.4,0)(0.32,0.4,0)(0,0,0)(0,0,12)生成线:Main Menu: Preprocessor Modeling Create Lines lines Straight lines依次连接(-0.32,0,0)(-0.42,0,0)(-0.42,0.4,0)(-0.32,0.4,0);同样依次连接相邻点(0.32,0,0)(0.42,0,0)(0.42,0.4,0)(0.32,0.4,0)再次连接(0,0,0)(0,0,12)拉伸成面:Preprocessor Modelingoperateextrudelinesabout lines选择槽钢型线apply选择(0,0,0)(0,0,12)形成的线OK,将槽钢拉伸完成(B)生成角钢:生成特征点:Main Menu: Preprocessor Modeling Create Keypoints In Active CS依次输入坐标值(-0.34,0.4,0)(-0.40,0.4,0.07)(-0.40,0.5,0.07)(-0.34,0.4,0.84),(0.34,0,0)(0.40,0,0)(0.40,0,0.07)(-0.34,-0.1,0.07)(-0.34,-0,0.84)生成线:依次连接(-0.34,0.4,0)(-0.40,0.4,0.07)(-0.40,0.5,0.07)0.34,0,0)(0.40,0,0)(0.40,0,0.07)(-0.34,-0.1,0.07)拉伸成面:Preprocessor Modelingoperateextrudelinesabout lines选择(-0.34,0.4,0.84)(-0.34,0.4,0)和(0.34,0,0)(-0.34,-0,0.84)形成的线apply选择(0.42,0.4,0.14)(-0.35,0.4,0.91)形成的线OK复制生成其他角钢:Preprocessor Modelingcopyareas选中要移动的角钢okdz输入1.9OK同理:生成特征点:Main Menu: Preprocessor Modeling Create Keypoints In Active CS依次输入坐标值(0.34,0.4,0.86)(0.340,0.4,0.93)(0.34,0.5,0.86)(-0.34,0.4,1.7)(-0.34,0.4,0.86)(-0.340,0.4,0.93)(-0.34,0.5,0.86)(0.34,0.4,1.7)生成线:Main Menu: Preprocessor Modeling Create Lines lines Straight lines依次连接(0.34,0.4,0.86)(0.340,0.4,0.93)(0.34,0.5,0.86) (-0.34,0.4,0.86)(-0.340,0.4,0.93)(-0.34,0.5,0.86)拉伸成面:Preprocessor Modelingoperateextrudelinesabout lines将角钢拉伸完成。复制生成其他角钢:Preprocessor Modelingcopyareas选中要移动的角钢okdz输入1.88ok(C)创建拉杆:生成点:Main Menu: Preprocessor Modeling Create Keypoints In Active CS依次输入(0,2.9.0)(0.35,0.4,8.5)(-0.35,0.4,8.5)生成线:Main Menu: Preprocessor Modeling CreatelinesStraight lines依次连接(0,2.9.0)(0.35,0.4,8.5)(-0.35,0.4,8.5)5)将角钢和槽钢搭接:Main Menu: Preprocessor Modeling operatebooleansoverlapareaspick allOK6)拉杆与槽钢耦合前先建立硬点:Main Menu: Preprocessor Modeling Create Keypointshardpoint on areahard pt by coordinate选择建立硬点的面ok输入(0.35,0.4,8.5)同理在点(-0.35,0.4,8.5)建立硬点。7)网格划分ANSYS Main Menu: Preprocessor Meshing Mesh tool areaset选择槽钢的上下表面OK在对话框中选择1okarea set选择槽钢的上下表面ok对话框中输入0.2okmesh选择槽钢的侧表面OK同理划分腹板和角钢8)将拉杆跟槽钢耦合:Main Menu: Preprocessorcouplingcouple DOFs选择硬点ok选择node点选择全约束(all)ok9)模型施加约束:施加平衡臂的全约束:main Menu: solutiondefine loadsapply Structural Displacementon line选择约束线uxok。同理施加除z轴旋转的弯矩。在(0,2.4,13)点施加全约束:main Menu: solutiondefine loadsapply Structural Displacementon keypoints选择点(0,2.9,0)选择全约束ok施加载荷:main Menu: solutiondefine loadsapply Structural forceon keypoints(0.34,0.4,11)(-0.34,0.4,11)oky方向施加-72030。同理,在(0.34,0.4,10)(-0.34,0.4,10)施加y方向-11270,在(0.34,0.4,7)(-0.34,0.4,7)施加y方向-18886.510)施加风载荷:Main Menu: Preprocessor Modeling Create Keypoints In Active CS依次输入坐标值(0.42,0.2,10)(0.42,0.2,7)main Menu: solutiondefine loadsapply Structural forceon keypoints(0.42,0.2,10)OKFX-4410OK;同理在(0.42,0.2,7)施加-690N的力定义重力加速度和风载荷:main Menu: solutiondefine loadsapply Structural inertialgravityglobleacelx 0.454,acely9.8ok11)后处理:main Menu: solutionsolvecurrent LSOK12)定义力:General postprocelement table define tableadduser able for iterm TXby sequence numsmiscsmisc1applyuser able for iterm TYby sequence numsmiscsmisc2apply依次定义TXY,MX , MY , MXY user able for iterm STRESS1 by sequence numnmisc1apply依次定义STRESS2 , STRESS3 okcloseTX图:General postprocelement tableplot element tableiterm to be plotedtxokTY图选择ty TXY图:txy MX图:mx MY图:my MXY图:mxy PSTRESS1图:NMSIC,1 PSTRESS2图: NMSIC,2 PSTRESS3图: NMSIC,3TX图 TY图TXY图 MX图MY图MXY图PSTRESS1图PSTRESS2图PSTRESS3图变形图:General postp
网站客服QQ:2055934822
金锄头文库版权所有
经营许可证:蜀ICP备13022795号 | 川公网安备 51140202000112号