9-1力矩分配法的基本概念 根据平衡条件 云M=0 M2+M3+M4=M M △1=42+i6+31d 4i2 M Mu=i+in+3iu M1= M in M Ms=4+i6+3i M1=-M13 3i12 M M4=4+i6+3i4 M41=0·M49-1力矩分配法的基本概念 根据平衡条件 ( ) 12 13 14 1  M M M M M = + + = 0 12 12 21 12 12 13 14 4 1 4 3 2 i M M M M i i i = = + +1 12 13 14 4 3 M i i i  = + + 13 13 31 13 12 13 14 4 3 i M M M M i i i = = − + + 12 14 41 14 12 13 14 3 0 4 3 i M M M M i i i = =  + +