1.单元坐标转换矩阵07e000cosasina0000sinacosa一000001[7] =0000sinacosa0000-sinacosa000001正交矩阵[] - []
1. 单元坐标转换矩阵 [ ] cos sin 0 0 0 0 sin cos 0 0 0 0 0 01 0 00 0 0 0 cos sin 0 0 0 0 sin cos 0 0 00 0 01 e a a a a T a a a a ⎡ ⎤ ⎢ ⎥ −⎢ ⎥ ⎢ ⎥ = ⎢ ⎥ ⎢ ⎥ ⎢ ⎥ − ⎢ ⎥ ⎣ ⎦ [ ] [ ] 1 T T = T 正交矩阵 －
2.整体坐标系的单元刚度矩阵局部坐标系的刚度矩阵(F°=[°e)[K]1？整体坐标系的刚度矩阵[Kk](F (e) =[k]e (A](e)
2. 整体坐标系的单元刚度矩阵 { } [ ] { } (e) (e) (e) F = k Δ { } [ ] { } ( e ) ( e ) ( e ) F = k Δ [ ] ( e ) k [ ] ( e ) k 局部坐标系的刚度矩阵 整体坐标系的刚度矩阵