求救——阻尼加载疑问！

西北狂沙

我做的是高g加速度计瞬态分析，给一7万g（重力加速度）的脉冲信号，命令流入下:<BR>/BATCH             <BR>!*  <BR>! /REPLOT,RESIZE  <BR>/CWD,'F:\0FEM_GAO'  <BR>/CWD,'F:\0FEM_GAO'  <BR>/FILNAME,high-g-dyna,0   <BR>/PREP7  <BR>ET,1,SOLID95<BR>MPTEMP,,,,,,,,  <BR>MPTEMP,1,0  <BR>MPDATA,EX,1,,200e9  <BR>MPDATA,PRXY,1,,0.3  <BR>MPTEMP,,,,,,,,  <BR>MPTEMP,1,0  <BR>MPDATA,DENS,1,,7800 <BR>RECTNG,2e-3,5.5e-3,0,1.5e-3,<BR>RECTNG,-0.002,0.002,0.5e-3,0.0015,  <BR>RECTNG,-0.002,-0.0055,0,0.0015, <BR>!*  <BR>VOFFST,3,3e-3, ,<BR>! APLOT   <BR>!*  <BR>VOFFST,2,0.003, ,   <BR>!*  <BR>VOFFST,1,0.003, ,   <BR>WPSTYLE,,,,,,,,1<BR>WPSTYLE,,,,,,,,0<BR>! /VIEW, 1 ,1,2,3 <BR>! /ANG, 1 <BR>! /REP,FAST   <BR>FLST,2,3,6,ORDE,2   <BR>FITEM,2,1   <BR>FITEM,2,-3  <BR>VGLUE,P51X  <BR>!*  <BR>SMRT,6  <BR>!*  <BR>MSHAPE,1,3D <BR>MSHKEY,0<BR>!*  <BR>FLST,5,3,6,ORDE,2   <BR>FITEM,5,4   <BR>FITEM,5,-6  <BR>CM,_Y,VOLU  <BR>VSEL, , , ,P51X <BR>CM,_Y1,VOLU <BR>CHKMSH,'VOLU'   <BR>CMSEL,S,_Y  <BR>!*  <BR>VMESH,_Y1   <BR>!*  <BR>CMDELE,_Y   <BR>CMDELE,_Y1  <BR>CMDELE,_Y2  <BR>!*  <BR>FINISH  <BR>/SOL<BR>ANTYPE,trans<BR>TRNOPT,FULL<BR>OUTRES,ALL,ALL,<BR><FONT color=#e61a94><FONT color=#000000>alls</FONT><BR>alph,5        !质量阻尼加载为 5</FONT><BR>time,on     <BR>deltim,1e-5,0.5e-5,2.5e-5<BR>autots,on<BR>KBC,1<BR>FLST,2,2,5,ORDE,2   <BR>FITEM,2,5   <BR>FITEM,2,15  <BR>!*  <BR>/GO <BR>DA,P51X,ALL,<BR>time, 600e-6<BR>acel,0,700000<BR>lswrite,1<BR>time,800e-4  <BR>acel,,0<BR>lswrite,2<BR>lssolve,1,1,1<BR>finish<BR>/POST 1  <BR>PLDISP,2<BR>     可气怪的是，加载阻尼和忽略阻尼加载效果一样，加速度计的响应信号波形完全一样，是一个逐渐震荡稳定的合成复杂正弦信号，难道阻尼不起作用么？？还是我的阻尼加载有问题呢？觉得自己应该加载质量阻尼而不是刚度阻尼和其他阻尼，不知道哪位可以释义呀？