扭力梁后悬架Adams模型预载调节.doc

根据帮助整理的：方法一：制作mnf文件时添加step1:用按ansys制作自由摸态的mnf文件（old.mnf）step2:用记事本制作预载荷文件(load.txt)格式如下：%PC 节点添加预载（初始值）1000FX 1e5 1000号节点X向加100000N1001FY -1e5%C 节点添加载荷（恒定值）1000FX 1e5 1000号节点X向加100000N1001FY -1e5%PM 模态添加预载101e5 1000号模态加100000N%M 模态添加载荷101e5 1000号模态加100000Nstep3:用命令行执行命令生成含有预载荷的mnf文件(new.mnf)格式如下：%mdi -c flextk mnfload old.mnf new.mnfload.txt step4:用ADAMS定义modal force,选用funtion方法二：编写用户子程序添加step1:用fortran或C+写MFOSUB函数，生成ADAMS/solver的dll（详情参考论坛相关帖子）step2:用ADAMS定义modal force,选用subroutine,并输入函数参数和dll的路径（期待高手完善）补充例子如下：一根梁两端固定，中间某排节点添加向下的集中力方法一：制作mnf文件时添加step1:用按ansys制作自由摸态的mnf文件（old.mnf）命令流如下：/PREP7ET,1,SOLID95 ET,2,MASS21 R,1,1e-6,1e-6,1e-6,1e-6,1e-6,1e-6,MPTEMP,MPTEMP,1,0MPDATA,EX,1,2e11 MPDATA,PRXY,1,.3 MPTEMP,MPTEMP,1,0MPDATA,DENS,1,7800 BLOCK,0,0.01,0,0.001,0,0.002,K,10001,0,0.0005,0.001 K,10002,0.01,0.0005,0.001TYPE,1VSWEEP,1TYPE,2KMESH,10001KMESH,10002ASEL,S,5NSLA,S,1NSEL,A,818nplotCERIG,818,ALL,UXYZ, allsel,allASEL,S,6 NSLA,S,1NSEL,A,819nplotCERIG,819,ALL,UXYZ, allsel,allansys2.GIF (44.79 KB)2008-6-19 21:49step2:用记事本制作预载荷文件(load.txt)文件内容如下：%C389 FY -100132 FY -100133 FY -100134 FY -100464 FY -100（注意上面的东西不能多也不能少，连回车和空格也不例外，否则导致生成失败）step3:用命令行执行命令生成含有预载荷的mnf文件(new.mnf)运行cmd.exe执行以下命令：adams05 flextk mnfload old.mnf mew.mnf load.txt执行完毕信息：E:testexample_modal_forceadams05 flextk mnfload old.mnf new.mnf load.txtBegin execution of MSC Flex Toolkit (mnfload).Title:Name : ct_tempType : ANSYS 11.0Comment 1:Comment 2:Comment 3:Exporting frequency range -1.000000e+000,1.000000e+008Creating a Modal Neutral File with the following information:Nodal Coords YesElement Faces YesEigenvalues YesMode Shapes YesGlobal Mass Properties YesNodal Masses YesNodal Inertias YesGeneralized Stiffness NoGeneralized Mass NoGeneralized Damping NoMode Transformation YesStress Modes YesInterface Nodes YesInertia Invariants NoModal Preload NoModal Loads YesStrain Modes YesNode info:Count: 819Global body properties:Mass : 0.000158Center of Mass: 0.005000 0.000506 0.000987Inertia Tensor: 0.000002 0.000000 0.000000 0.000000 0.000002 0.000000 0.000000 0.000000 0.000002Eigenvalue info: Modes: 18Trans Mode info: Modes: 18 Nodes: 819Writing Mode ShapesNodal inertia info: Sparse matrix entries: 6Units: Mass: KILOGRAM Length: METER Time: SECOND Force:NEWTONNumber of Element Faces: 720Stress Mode info: Modes: 18 N