4G (2k+1)ma T2+1(t)= dt (2k+1)ma2-b(t-r b (2k+1)r (2k+1)mu2-b 4G (2k+1)z(2k+1)ma 6s,(2k+1)m2-b(-) (2k+1)z(2k+1)mu -cO,(2k+1)m bt] )2-b (2k+1)m)2<b 4G (2k+1) 7x+()= inh 6 )2(t-r) (2k+1)丌 2k+l)Ta 4G (2k+1)mu cosh b (2k+1) b 2k+1)ra 4G [cos b (2k+1)ma (2k+1)z b-( (2k +lTa) ( ) (2 1) sin ( ) (2 1) ( 1 (2 1) 4 ( ) 2 0 2 2 1      − − + − + + = +  b t l k a b l k a d k G T t t k b l k a  + 2 ) (2 1) t b t l k a b l k k a G 0 2 2 ) ( ) (2 1) cos ( ) (2 1) ( 1 (2 1) 4     − − + − + + = ) ] (2 1) [1 cos ( ) (2 1) ( 1 (2 1) 4 2 2 bt l k a b l k k a G − + − − + + =    b l k a  + 2 ) (2 1) ) ( ) (2 1) sinh ( ) (2 1) ( 1 (2 1) 4 ( ) 2 0 2 2 1      − + − + − + = +  t l k a b l k a b d k G T t t k t t l k a b l k a b k G 0 2 2 ) ( ) (2 1) cosh ( ) (2 1) ( 1 (2 1) 4     − + − + − − + = ) 1] (2 1) [cos ( ) (2 1) ( 1 (2 1) 4 2 2 − + − + − + = t l k a b l k a b k G   