ansys中怎样使用CTMOPT命令

Question

如题所述

Answer 1

这个是断裂力学里面的一个宏命令，单独情况下使用是没有的，要有一定的其他命令配合，意思也就不尽相同，处理方法也就不一样了，所以这个命令的使用建议楼主参考断裂力学的分析知识;
英文说明比较清楚点：
Structural Guide |
Chapter 12. Fracture Mechanics
这个命令的使用几乎需要全部的断裂力学的知识！
CTMOPT,Option,Val1,Val2

Sets crack tip meshing options for fracture mechanics.

Valid Option values are:

DEFAULT
Resets all options to default values.

STATUS
Lists the current status of all options.

CONFIG
Specifies the crack type and the symmetry condition.

Valid Val1 values:
THROUGH -- Through crack (default)
SURFACE -- Surface crack
Valid Val2 values:
FULL -- Full crack (default)
HALF -- Half crack
QUARTER -- Quarter crack

VOLUME
Val1 -- An existing volume number. A value is required for this option.

LENGTH
Val1 -- Crack length. A value is required for this option.

DEPTH
Val1 -- Crack depth. Valid only for surface (SURFACE) cracks. The default value is half of the crack length (LENGTH / 2).

CNAME
Val1 -- Crack node component. Specify this value in uppercase characters only, enclosed in single quotation marks. Example: 'NODECOMP1'

BLNG
Val1 -- Length of blocks on either side of a through crack (THROUGH). Use this value to sector the length along the sides of the crack into a precise number of elements, or to sector elements of a precise size. The default value is the crack length (LENGTH), where the entire length is devoted to one block.

BWID
Val1 -- Width of blocks on either side of a through crack (THROUGH). The default value is the crack length (LENGTH).

CEXT
Val1 -- Greater-than distance from the working plane to the back of the through crack (THROUGH) crack initial volume. The default value is five times the crack length (5 * LENGTH)

NETH
Val1 -- Number of elements around the crack tip in the THETA direction. The default value derives from the PREP7 command KSCON.

ESCZ
Val1 -- Element size radially outward from crack. The default value is one-tenth of the block width (BWID / 10) for a through crack (THROUGH), or one-tenth of the crack zone radius (radius / 10) for a surface crack (SURFACE).

NROW
Val1 -- Number of rows of elements around the crack tip in a radial direction. The default value is 3.

ETHK
Val1 -- Number of elements through the thickness of a through crack (THROUGH). The default value is 3.

ESZB
Val1 -- Element size along surface crack (SURFACE) zone boundaries. The default value is one-fourth of the crack (LENGTH / 4).

QUAD
Val1 -- Set this value to 1 to generate quad element faces on surface crack (SURFACE) zone boundaries. The default is triangles.

HELP
Lists this helps information.

上面是一些说明，但是有上面的这个，肯定不够理解这个命令！