柔性体预载荷施加.docVIP

modal force定义柔性体预载 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）1000??FX 1e5? ?? ?1000号节点X向加100000N1001??FY -1e5%C? ?? ?? ?? ?? ?? ? 节点添加载荷（恒定值）1000??FX 1e5? ???1000号节点X向加100000N1001??FY -1e5%PM? ?? ?? ?? ?? ? 模态添加预载10??1e5? ?? ?? ?? ? 1000号模态加100000N%M? ?? ?? ?? ?? ?? ?模态添加载荷10??1e5? ?? ?? ?? ? 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.mnf??load.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：/PREP7??ET,1,SOLID95 ET,2,MASS21 R,1,1e-6,1e-6,1e-6,1e-6,1e-6,1e-6,??MPTEMP,,,,,,,,??MPTEMP,1,0??MPDATA,EX,1,,2e11? ?MPDATA,PRXY,1,,.3? ?MPTEMP,,,,,,,,??MPTEMP,1,0??MPDATA,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,all ansys2.GIF (44.79 KB) 2008-6-19 21:49 step2: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:\test\example_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+008]Creating a Modal Neutral File with the following information:Nodal Coords YesElement Faces YesEigenvalues YesMode Shapes YesGlobal Mass Properties YesNodal Masses YesNodal Inertias YesGeneralized Stiffness NoGeneral