阻尼比对振幅衰减的影响 称为减幅系数 A 1 nTi A 4 en(t1+1) n=1 2 f 0V 2丌 In d +4/in-d 104010/10 d d f n T e e Ae Ae A A d A A d r n T n t T n t 2 2 2 2 0 0 1 1 2 ( ) 2 1 2 1 1 4 / ln 1 , 1 2 ln 1 1 2 , 2 1 1 1 1 + = − = − = = = = = = = = − − + − 称为减幅系数