By Xiedd126@163.com 1 abaqu s 中的局部坐标系 在abaqus 中,在不同的模块中使用不同的局部坐标系类型,主要有下面几种局部坐标系: 1、定义节点的局部坐标系 2、定义节点自由度的局部坐标系 3、单元局部坐标系 1. 定义节点的局部坐标系(*SYSTEM) 有时在一个局部坐标系中定义节点坐标是方便的,然后再转换这些坐标值到总体坐标系中。用户可以定义一个局部节点坐标系,Abaqus 将转换和旋转局部坐标值()到总体坐标系。在input 完成后立刻完成该转换,并且该转换将施加到在定义了节点坐标系后的所有输入的节点坐标上。 【1】关键字*SYSTEM 关键字*SYSTEM 使用规则:先定义坐标系,再使用。 先用*SYSTEM 定义局部坐标系,然后在node definition(如*NODE 关键字)里面选择定义的坐标系。返回到整体的坐标系使用*SYSTEM+ 空白的数据行。 *SYSTEM 第一行 1、 , global X-coordinate of the origin of the local coordinate system (point a in Figure 18.58–1). 2、, global Y-coordinate of the origin of the local coordinate system. 3、, global Z-coordinate of the origin of the local coordinate system. The following entries are not needed for a pure translation: 4、, global X-coordinate of a point on the -axis of the local coordinate system (point b in Figure 18.58–1). 5、, global Y-coordinate of a point on the -axis of the local coordinate system. 6、, global Z-coordinate of a point on the -axis of the local coordinate system. 第二行 (optional; if not provided, the Z-axis direction remains unchanged, and the -axis is projected onto the plane): 1、, global X-coordinate of a point in the plane of the local coordinate system, on the side of the positive -axis (for example, point c in Figure 18.58–1). By Xiedd126@163.com 2 2、, global Y-coordinate of a point in the plane of the local coordinate sy stem, on the side of the positiv e -ax is. 3、, global Z-coordinate of a point in the plane of the local coordinate sy stem, on the si...