eo A=h,- h 受压前后Vs,A不变 1+eo 1+e 1+e ho hho-Ah 1+eo 1+e 1+e △h1+e) →e,=eo- 其中：e, G,+)ps-1 e V Po V=V,(1+e) .△h,→e, V hA 1+e 1+e ( ) ( ) i i s w h e G e e h h e e e h h e h e h V s A  → − + = +   = − + −  = + = + 1 1 1 1 1 1 0 0 0 0 0 1 1 0 1 0 1 1 1 0 0    其中： 受压前后 ， 不变 A e h s A e h A e h Vs + − = + = + = 1 ( ) 1 1 0 0 0 e hA e V V V V e V V V V V e s s s s s v + = + = = + − = = 1 1 (1 )