老师,您好!我做了一个简单的梁模型,分析出来的结果也还是出现了衰减,这就头大了
FINISH
/CLEAR,NOSTART
/PREP7
ET,1,BEAM188
MPTEMP,1,0 !BEAM
MPDATA,EX,1,,2.06e11
MPDATA,PRXY,1,,0.3
MPDATA,DENS,1,,7846
SECTYPE,101,beam,I !!!! H1500A
SECDATA,0.65,0.65,1.5,0.05,0.05,0.032
SECOFFSET,user,0,0.75
N,1,1,0,0
NGEN,9,1,1,,,1
MAT,1
TYPE,1
SECNUM,101
E,1,2
EGEN,8,1,-1
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!施加约束
nsel,s,,,1,9,8
CM,NN,NODE
D,NN,ALL
ALLS
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!施加位移边界条件
ACEL,,,9.8
ALLS
C****求解
!瞬态分析
/SOLU
ANTYPE,TRANS !指定分析类型
TRNOPT,FULL !指定瞬态分析选项
SOLCONTROL,ON
LNSRCH,ON
PRED,ON !在非线性分析中激活一个预测器
KBC,1 !指定载荷步为阶跃还是递增方式(0=递增)
!NLGEOM,1 !在静态或完全瞬态分析中包含大变形效应
ALPHAD,2.04
betad,0.00039
T0=0.1E-10
*DO,t,T0,10,0.01
TIME,t
f=50
F,5,FZ,10000*SIN(2*3.14*f*t)
ALLS
OUTRES,basic,ALL
SOLVE
*ENDDO
FINISH
|