/// <summary>
/// 计算节点相交处相应单元的轴力向量
/// </summary>
/// <param name="node">节点号</param>
/// <param name="ele">单元号（必须为FrameElement）</param>
/// <param name="com">荷载组合</param>
/// <returns>轴力向量</returns>
public Vector3 GetNodeForceVec(int node, int ele, BLoadComb com)
{
Vector3 Res = new Vector3();
FrameElement fme = MM.elements[ele] as FrameElement;
//如果节点不在单元上则返回0向量
if (fme.iNs.Contains(node) == false)
{
return(new Vector3());
}
ElemForce Force = MM.CalElemForceComb(com, ele);
if (fme.I == node)
{
Res = MM.getFrameVec(ele);
Res.Normalize();//归一化
Res = Res * Force.Force_i.N;
}
else
{
Res = -MM.getFrameVec(ele);
Res.Normalize();//归一化
Res = Res * Force.Force_j.N;
}
return(Res);
}