ABAQUS圆弧面施加正弦分布压力荷载
工程模拟当中有时需要在圆弧面上施加正弦分布的压力，比如衬砌表面的压力如图：https://img.jishulink.com/upload/201807/1530498234958_640.webp.jpg1、创建解析场（Tools -> Analytical Field -> Create）https://img.jishulink.com/upload/201807/1530498368315_640.webp%20(1).jpg
2、在弹出的对话框中对要创建的解析场进行命名，并选择解析场的类型（Expression Field）https://img.jishulink.com/upload/201807/1530498372814_640.webp%20(2).jpg
3、点击Continue后，弹出如下对话框，点击红色框内按钮，创建参考坐标系https://img.jishulink.com/upload/201807/1530498377010_640.webp%20(3).jpg
4、坐标系创建对话框中，完成参考坐标系的命名，并选择新建参考坐标系的类型（Cylindrical）https://img.jishulink.com/upload/201807/1530498396520_640.webp%20(4).jpg
data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVQImWNgYGBgAAAABQABh6FO1AAAAABJRU5ErkJggg==
5、以模型的内圆弧面的圆心为原点，创建柱面坐标系，坐标系的方向（R -> 径向，T -> 环向，Z -> 轴向）https://img.jishulink.com/upload/201807/1530498413259_640.webp%20(5).jpg
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6、坐标系创建完毕后返回，解析场定义对话框，点击红色圆圈的选择按钮https://img.jishulink.com/upload/201807/1530498422236_640.webp%20(6).jpg
data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVQImWNgYGBgAAAABQABh6FO1AAAAABJRU5ErkJggg==
7、选择已创建的圆柱坐标系https://img.jishulink.com/upload/201807/1530498427648_640.webp%20(7).jpg
https://img.jishulink.com/upload/201807/1530498441921_640.webp%20(8).jpg
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9、返回解析场定义对话窗口后，根据位置关系，在框内定义压力场分布的解析表达式。（注意环向角度Th 的单位为弧度） 该圆弧面的的度为pi*2/3，相对于环向起点旋转了pi/2，所以其表达式为 cos (( Th - pi / 2 ) / 2 * 3 )。https://img.jishulink.com/upload/201807/1530498449246_640.webp%20(9).jpg
10.解析场定义完毕后，在荷载定义中选择钢材定义的解析场作为压力分布形式。填写荷载量值并正确选择其作用的圆弧面。https://img.jishulink.com/upload/201807/1530498453501_640.webp%20(10).jpg
至此完成圆弧面正弦分布压力荷载的施加
谢谢大佬指点
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