我正在尝试制作一个“I”形横截面的二维四边形网格，元素大小为 5。到目前为止，我已经设法只制作四边形，但是有些元素在他们不应该。此外，元素总数不正确。你能帮帮我吗？

这是我的 .geo 代码：

Point(1) = {0, 0, 0, 1.0};
Point(2) = {45, 0, 0, 1.0};
Point(3) = {55, 0, 0, 1.0};
Point(4) = {100, 0, 0, 1.0};
Point(5) = {100, 10, 0, 1.0};
Point(6) = {55, 10, 0, 1.0};
Point(7) = {45, 10, 0, 1.0};
Point(8) = {0, 10, 0, 1.0};
Point(9) = {0, 90, 0, 1.0};
Point(10) = {45, 90, 0, 1.0};
Point(11) = {55, 90, 0, 1.0};
Point(12) = {100, 90, 0, 1.0};
Point(13) = {100, 100, 0, 1.0};
Point(14) = {55, 100, 0, 1.0};
Point(15) = {45, 100, 0, 1.0};
Point(16) = {0, 100, 0, 1.0};

Line(1) = {1, 2};
Line(2) = {2, 3};
Line(3) = {3, 4};
Line(4) = {4, 5};
Line(5) = {5, 6};
Line(6) = {6, 11};
Line(7) = {11, 12};
Line(8) = {12, 13};
Line(9) = {13, 14};
Line(10) = {14, 15};
Line(11) = {15, 16};
Line(12) = {16, 9};
Line(13) = {9, 10};
Line(14) = {10, 7};
Line(15) = {7, 8};
Line(16) = {8, 1};

Line Loop(1) = {14, 15, 16, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13};

Plane Surface(1) = {1};

Recombine Surface {1};

Transfinite Line {2, 4, 16, 12, 10, 8} = 3 Using Progression 1;
Transfinite Line {14, 6} = 17 Using Progression 1;
Transfinite Line {1, 15, 3, 5, 7, 9, 13, 11} = 10 Using Progression 1;