Question

如何使用ansys的实常数定义命令

一直闹不懂实常数命令R是怎么用的。。。貌似各个参数的顺序，不同参数的定义方式都是杂乱无章的啊
下面黏贴了几个 求大神帮忙解释
R,1，1.03E-1，1.589E-4，1.94E-5，0.18,0.3
RMORE,,110976E-11
r,1,2,0.00745,90,90 !定义上混凝土板实常数
r,3,gybh,gybh,gybh,gybh !定义钢梁上下翼缘的厚度

r,4,gfbh,gfbh,gfbh,gfbh !定义钢梁腹板厚度

r,5,0,0,0.00002,12175,0.00004,16021 !定义弹簧的荷载变形曲线

rmore,0.00005,17492,0.00006,18789,0.00007,19956
rmore,0.00008,21022,0.00009,22006,0.0001,22921
rmore,0.0002,29831,0.0003,34610,0.0004,38313
rmore,0.0005,41338,0.0006,43887,0.0007,46078
rmore,0.0008,47989,0.0009,49673,0.001,51169
rmore,0.002,61124,0.003,63521
r,6 !垫板实常数

r,7,0.00004398 !上混凝土板中纵筋的横截面积（折合而来）

r,8,0.000050265 !下混凝土板中纵筋的横截面积

Answer 1

R, NSET, R1, R2, R3, R4, R5, R6
Defines the element real constants.

其中：
NSET---- Set identification number (arbitrary). If same as a previous set number, set is redefined. Set number relates to that defined with the element [REAL]. Note that the GUI automatically sets this value.
R1, R1, R2, R3, R4, R5, R6 ---- Real constant values (interpreted as area, moment of inertia, thickness, etc., as required for the particular element type using this set), or table names for tabular input of boundary conditions. Use RMORE command if more than six real constants per set are to be input.

r 不是单独使用的，它后面六个常数值的意义取决于你所使用的单元的类型。单元类型不同，后面的实常数值的意义当然就不同了。比如，壳单元就需要用实常数给出每个节点处的壳厚度；梁单元就需要用实常数定义梁单元的横截面积等。而对于从R1到R6...所定义的到底是什么值？当然就要去相应的单元的输入要求中查看。

最简单的了解一个单元所需定义的实常数值的意义，顺序，直接在ansys的主菜单中用人机交互的方式添加一个实常数，你会发现，不同的单元所要输入的实常数的个数以及每个实常数的意义都已经给你列出来了。相信你自己定义完一个后，就会明白了。