小弟 做管道的 模态分析 但结果不对 哪位大侠拜托了~~
小弟 做管道的 模态分析 用命令流写了一段 但结果不对 能运行 结果固有频率太低不知是何问题 直接粘贴 太长 影响群里其他人 哪位大侠帮我下 我给你发过去~~~拜托了命令流如下：
/TITLE,guandao
/UNITS,MKS !MKS system (m, kg, s, °C).
/PREP7 !进入前处理器
!设置材料参数
MP,EX,1,2.06e11 ! EX=206e9Pa PRXY=0.27 mi du=7850kg/m3
MP,PRXY,1,0.27
MP,ALPX,1,2.16e-5 !热膨胀系数
MP,DENS,1,7850
PUNIT,2 !设置为米制单位 (meter A+centimeter B+fraction of cm C/D)
PSPEC,1,,,0.0337,0.00415 !管子外径3.37CM 壁厚：0.415CM
PFLUID,1.205 !流体密度
POPT,NC !管道分析标准: ASME Section III NC, Class 2.
PTEMP,20 !Temperature = 20°
PPRES,100000 !Internal pressure = 1大气压=0.1Mpa
BRANCH,1,0,0,0 !第一根管起点
/PNUM,NODE,1 !显示节点及编号
RUN,0,1+1 !meter A+centimeter B+fraction of cm C/D
RUN,0,0+52+1/2 !点A>节点3
RUN,0+52+5/10
RUN,1+1 !点B>节点5
RUN,0+63 !点C>节点6 支撑点
RUN,0+17
RUN,0+51+1/2 !点D>节点8
RUN,0,0,0+34+1/2 !点E>节点9 支3
RUN,0,0+30 !末端>节点10
BRANCH,2 !分支1 起点
RUN,0,0,-0+20+1/2
RUN,0+33 !节点12
BRANCH,5 !分支2 起点
RUN,0,-0+84 !节点13
BRANCH,8 !点D>节点8
RUN,0+36+1/2 !节点14
RUN,0+21+1/2 !点E>节点15
RUN,0,-0+53+1/2 !点F>节点16
RUN,0,-0+52+1/2 !点H>节点17
RUN,0,0,0+20+1/2 !点K>节点18 支撑点
RUN,0,0,0+79+1/2 !点L>节点19
RUN,0,0,0+51 !节点20
RUN,0,0,0+9 !节点21>端点M
BRANCH,16 !分支4 节点16起点F
RUN,0,0,0+85 !节点22
RUN,0,0,0+19 !节点23>端点G
TEE,2,WT !
TEE,5,WT !
TEE,8,WT !
TEE,16,WT !
/PNUM,DEFA
/PNUM,ELEM,1
EPLOT
BEND,10,11,SR !
BEND,2,3,SR
BEND,8,9,SR
BEND,14,15,SR
BEND,16,17,SR
/PNUM,DEFA
/PNUM,NODE,1
EPLOT
VALVE,12,,0.96 !在节点12处插入阀 (0.96 Kg)
VALVE,13,,0.191
VALVE,10,,1.114
VALVE,23,,0.96
/VIEW,1,2,-1,3
EPLOT
ACEL,0,-9.8,0 !重力加速度
D,1,UX,0 ! 限制结点1的X和Y方向自由度
D,1,UY,0
D,21,All
PSPRNG,6,TRAN,1e7,-0+90
PSPRNG,6,TRAN,1e7,,-0+90
PSPRNG,18,TRAN,1e7,,-0+90
/SOLU
ANTYPE,MODAL
MODOPT,LANB,12
MXPAND,12,,,YES
SOLVE
!/AUTO
!/PNUM,DEFA
!EPLOT
!NLIST
!ELIST
!SFELIST
!BFELIST
!此文件单位为国际单位制
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