如图示,边长为1米,厚度为1厘米的正方形板,其上边中点处受到20KN力的作用,力的方向垂直向下。采用三角形单元进行有限元分析,节点、单元及局部码、总码如图示,节点1、2为简支。单元①、②的刚度矩阵相同,为
Passage Two
The Carr family of Wendell returns this week from Disney World on their first vacation ever, but the circumstances for taking it are one they would never have wanted. The trip was a result of the generosity of the Make-A-Wish Foundatio