<e(m)o(roy ) (0)12 C 0 2 a 7o 丌O(x (1)2 m2Jo(a)]? cosh(vu, h) (n:)=4+2 ∑ SIr 7G1[(x)2-m2[0(x0)2cosh(√42h)(1) 2 ( ) 0 2 (0) 2 2 ( )[ ( )] 2 1 [ ] m n n n J x m N a  = − 2 [ ] 2 (0) 2 0 a N =   0 2 a I B = [( ) ][ ( )] cosh( ) (1) 2 0 0 (1) 2 2 0 x m J x h I u n n n n n     − = sinh( ) ( ) [( ) ][ ( )] cosh( ) ( , ) 0 0 0 1 (1) 2 0 0 (1) 2 2 0 0 2           n n n n n n n z J x m J x h I a Iz u z A   = − + = + +