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ansys计算出现问题 没有结果
命令流如下/clear/prep7et,1,solid95real,1type,1mat,1mp,ex,1,1e11MP,PRXY,1,0.3r0=10h0=50k,1,...
命令流如下
/clear
/prep7
et,1,solid95
real,1
type,1
mat,1
mp,ex,1,1e11
MP,PRXY, 1,0.3
r0=10
h0=50
k,1,0,-10,0
k,2,0,10,0
k,3,0,-10,50
k,4,0,10,50
cyl4,,,r0,,,,h0
wprota,,90 !旋转工作平面
vsbw,all
wprota,,,90
vsbw,all !用工作平面分割体
mshape,0,3d !指定划分单元的形状
mshkey,1 !指定映射网格划分
lsel,s,loc,z,0
lesize,all,,,6
lsel,s,length,,h0
lesize,all,,,6
vmesh,all
fk,1,fx,1000
fk,2,fx,-1000
fk,3,fx,-1000
fk,4,fx,1000
/solu
solve
错误日志如下
Forces on unmeshed keypoint 1 are not transferred.
*** WARNING *** CP = 126.408 TIME= 12:28:56
Forces on unmeshed keypoint 2 are not transferred.
*** WARNING *** CP = 126.408 TIME= 12:28:56
Forces on unmeshed keypoint 3 are not transferred.
*** WARNING *** CP = 126.408 TIME= 12:28:56
Forces on unmeshed keypoint 4 are not transferred.
*** WARNING *** CP = 126.439 TIME= 12:28:56
No constraints have been defined using the D command.
*** WARNING *** SUPPRESSED MESSAGE CP = 129.559 TIME= 12:29:04
Smallest negative equation solver pivot term encountered at UX DOF of
node 49. Check for an insufficiently constrained model.
求详细解答,以及处理方法 展开
/clear
/prep7
et,1,solid95
real,1
type,1
mat,1
mp,ex,1,1e11
MP,PRXY, 1,0.3
r0=10
h0=50
k,1,0,-10,0
k,2,0,10,0
k,3,0,-10,50
k,4,0,10,50
cyl4,,,r0,,,,h0
wprota,,90 !旋转工作平面
vsbw,all
wprota,,,90
vsbw,all !用工作平面分割体
mshape,0,3d !指定划分单元的形状
mshkey,1 !指定映射网格划分
lsel,s,loc,z,0
lesize,all,,,6
lsel,s,length,,h0
lesize,all,,,6
vmesh,all
fk,1,fx,1000
fk,2,fx,-1000
fk,3,fx,-1000
fk,4,fx,1000
/solu
solve
错误日志如下
Forces on unmeshed keypoint 1 are not transferred.
*** WARNING *** CP = 126.408 TIME= 12:28:56
Forces on unmeshed keypoint 2 are not transferred.
*** WARNING *** CP = 126.408 TIME= 12:28:56
Forces on unmeshed keypoint 3 are not transferred.
*** WARNING *** CP = 126.408 TIME= 12:28:56
Forces on unmeshed keypoint 4 are not transferred.
*** WARNING *** CP = 126.439 TIME= 12:28:56
No constraints have been defined using the D command.
*** WARNING *** SUPPRESSED MESSAGE CP = 129.559 TIME= 12:29:04
Smallest negative equation solver pivot term encountered at UX DOF of
node 49. Check for an insufficiently constrained model.
求详细解答,以及处理方法 展开
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问题出现的原因如下:
(一)
Forces on unmeshed keypoint 1 are not transferred.
*** WARNING *** CP = 126.408 TIME= 12:28:56
Forces on unmeshed keypoint 2 are not transferred.
*** WARNING *** CP = 126.408 TIME= 12:28:56
Forces on unmeshed keypoint 3 are not transferred.
*** WARNING *** CP = 126.408 TIME= 12:28:56
Forces on unmeshed keypoint 4 are not transferred.
上述警告的原因是:
没有将施加的力转化到有限元模型上,引起的原因是:
施加力的四个关键点处均有重合的关键点,划分网格后关键点1/2/3/4并不属于任何一个单元,所以施加力也是没有作用的。
解决方法:
在
vmesh,all
添加:
NUMMRG,ALL, , , ,LOW
(二)
*** WARNING *** CP = 126.439 TIME= 12:28:56
No constraints have been defined using the D command.
上述警告的原因是没有对模型施加有效的约束。
解决方法:
在
fk,4,fx,1000
后面添加:
DK,13, , , ,0,ALL, , , , , ,
DK,14, , , ,0,ALL, , , , , ,
即可。
需要说明的是:上面两句命令我是为了让它可以计算,自己给你添加上的,具体这个分析应该怎样施加正确的约束还得你自己决定。
经过上述修改,可以正常运行求解。
(一)
Forces on unmeshed keypoint 1 are not transferred.
*** WARNING *** CP = 126.408 TIME= 12:28:56
Forces on unmeshed keypoint 2 are not transferred.
*** WARNING *** CP = 126.408 TIME= 12:28:56
Forces on unmeshed keypoint 3 are not transferred.
*** WARNING *** CP = 126.408 TIME= 12:28:56
Forces on unmeshed keypoint 4 are not transferred.
上述警告的原因是:
没有将施加的力转化到有限元模型上,引起的原因是:
施加力的四个关键点处均有重合的关键点,划分网格后关键点1/2/3/4并不属于任何一个单元,所以施加力也是没有作用的。
解决方法:
在
vmesh,all
添加:
NUMMRG,ALL, , , ,LOW
(二)
*** WARNING *** CP = 126.439 TIME= 12:28:56
No constraints have been defined using the D command.
上述警告的原因是没有对模型施加有效的约束。
解决方法:
在
fk,4,fx,1000
后面添加:
DK,13, , , ,0,ALL, , , , , ,
DK,14, , , ,0,ALL, , , , , ,
即可。
需要说明的是:上面两句命令我是为了让它可以计算,自己给你添加上的,具体这个分析应该怎样施加正确的约束还得你自己决定。
经过上述修改,可以正常运行求解。
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