关于Caesar II中的Nozzle check？ ref vector x, y, z specifies the three components or direction cosines of the reference vector. the reference vector is used with the current element orientation to define the local coordinate system abc for this equipment check. see axis b, in the forces - moments fields. the vector must be perpendicular to the current pipe element. this vector need not be unity. examples: ( 0, 1, 0 ) - the reference vector is in the global "y" direction ( 1, 0, 0 ) - the reference vector is in the global "x" direction ( 0.7071, 0, 0.7071 ) - the reference vector is skewed 45 degrees in the global x-z plane. fa就是管口方向的力，fb就是设备方向的力，fc就是另一个方向了！查看更多
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