弯幽形( Deflection of beams) 4.挠度与转角的关系 Relationship between deflection and slope): 6≈tan6=w=w(x) C B v挠度 挠曲线 转角 B(Deflection of Beams) 4.挠度与转角的关系 （Relationship between deflection and slope）： w A B x 转角  w挠度 C' C B 挠曲线    = = tan ' '( ) w w x