冶金工程中映射网格划分技巧(2)

冶金工程中映射网格划分技巧

I want to introduce today is another method (can have similar introduction on the BBS, but I have not seen, if you have, even if to revisit?) which is amap order (based on the corner of the map grid), the use of it needs to be specified to divide the number, and in any order specified on the face of any four corners (note: any four corner point is a premise, namely, dividing the number of matching, in order to no longer bothersome, later not repeated emphasis on this problem).

看一个简单的例子（如图1，尺寸见坐标），这个图形由3个面组成其中A2和A3满足映射网格划分的条件，A1看起来是个矩形但其实由5条边组成，要实现A1的影射网格划分，你可以用工作平面将其沿着L6切开，但这样就会多出一条线，某些情况是不希望有多余元素生成的，比如把图1看成是一块楼板，线就是梁，如果切割后就多出了一条线，对以后定义梁造成不便。这个问题不能用lcomb命令将线2和线4合并（自己可以试一下），另一个方法就是用amap,1,4,7,8,6。理论上amap命令可以用于任何多边形，但往往理论是实际是有差距的，还是刚才那个例子，如果你将线的划分尺寸定义为1（lesize,all,1），则线10的划分数为1，线2和线4各为1,然后你再用同样的命令amap,1,4,7,8,6，看看有什么结果——划分数不匹配，不能进行映射网格划分。相关命令流如下：

Look at a simple example (see coordinates) as shown in figure 1, the size, the graphic is composed of three level of A2 and A3, to meet the mapping grid conditions, A1 but it looks like a rectangle is composed of five edge, to achieve A1 alluding to the grid partition, you can use the work plane to be cut along the L6, but it would be more than a line, in some cases is don't want there to be redundant elements, such as the figure 1 as a floor, line is the beam, if after cutting out a line, to define beam inconvenience in the future. This problem can't use lcomb command incorporates the line 2 and line 4 (you can try), another method is to use amap, 1,4,7,8,6. Amap command can be used for any polygon in theory, but theory is actually often have a gap, or just the example, if you will wire the partition size is defined as 1 (lesize, all, 1), is the division of line 10 number is 1, line 2 and line 4 to 1, then you use the same command again amap, 1,4,7,8,6, see what's the result - the partition number do not match, can't be mapped meshing. Relevant command flow is as follows:

/PREP7

k

k,,1

kgen,3,1,2,1,,1

a,1,2,4,3

a,3,4,6,5

et,1,42

wprota,,,90

wpoffs,,,0.5

asbw,1,,dele

amap,2,3,4,5,6

aclear,all

lesize,all,1

amap,2,3,4,5,6

以上命令流所建模型的编号跟图1有些不同。从这个简单的例子大家应该能