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1、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 FX1e5 1000号节点X向加100000N1001 FY-1e5%C 节点添加载荷（恒定值）1000 FX1e5 1000号节点X向加100000N1001 FY-1e5%PM 模态添加预载10 1e5 1000号模态加100
2、000N%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-cflextkmnfloadold.mnfnew.mnf load.txtstep4:用ADAMS定义modalforce,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modalforce,选用su
3、broutine,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,SOLID95ET,2,MASS21R,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,
4、0 MPDATA,DENS,1,,7800BLOCK,0,0.01,0,0.001,0,0.002, K,10001,0,0.0005,0.001K,10002,0.01,0.0005,0.001TYPE,1VSWEEP,1TYPE,2KMESH,10001KMESH,10002ASEL,S,,,5NSLA,S,1NSEL,A,,,818nplotCERIG,818,ALL,UXYZ,,,,allsel,allASEL,S,,,6NSLA,S,1NSEL,A,,,819nplotCERIG,819,ALL,UXYZ,,,,allsel
5、,allansys2.GIF(44.79KB)2008-6-1921:49step2:用记事本制作预载荷文件(load.txt)文件内容如下：%C389FY-100132FY-100133FY-100134FY-100464FY-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：adams05flextkmnfloadold.mnfmew.mnfload.txt执行完毕信息：E:testexample_m
6、odal_force>adams05flextkmnfloadold.mnfnew.mnfload.txtBeginexecutionofMSCFlexToolkit(mnfload)...Title:Name:ct_tempType:ANSYS11.0Comment1:Comment2:Comment3:Exportingfrequencyrange[-1.000000e+000,1.000000e+008]CreatingaModalNeutralFilewiththefollowinginformation:NodalCoordsY
7、esElementFacesYesEigenvaluesYesModeShapesYesGlobalMassPropertiesYesNodalMassesYesNodalInertiasYesGeneralizedStiffnessNoGeneralizedMassNoGeneralizedDampingNoModeTransformationYesStressModesYesInterfaceNodesYesInertiaInvariantsNoModalPreloadNoModalLoadsYesStrainModesYesNode
8、info:Count:819Globalbodyproperties:Mass :0.000158CenterofMass:0.0050000.0005060.000987Inert
