△=11+O2X2+3x3+△ △2=O21X1+O2x2+O23x3+△2 A3=O31X1+O32Xx2+03x3+△y 利用协调条件: D1X1+O2X2+13X3=-A O2X1+2X2+23k3==△2g O31x1+32X2+03x3=-△y1 =  1 1X1 + 1 2X2 + 1 3X3 + 1q 2 =  2 1X1 + 2 2X2 + 2 3X3 + 2q 3 =  3 1X1 + 3 2X2 + 3 3X3 + 3q 利用协调条件： q q q X X X X X X X X X 3 1 1 3 2 2 3 3 3 3 2 1 1 2 2 2 2 3 3 2 1 1 1 1 2 2 1 3 3 1 + + = − + + = − + + = −         