N 



|[2(M + MQ/N)yQ + ipc^k^T^y^] - [pS^a + ipook^T^T^ a]j = [18b] 



N-r{M + Mq/N)Zq + |pcok[S(0)- RTq]^ Zq + pgS(0)zQ| 

 = - pg A [S(0) - RTq] y^ sin (ka^ cos e. - wt) [I8c] 



i=l 



N 



|[iMa^ + pS^ + lo/NfJ mz^dz] a +(^ pojka^ [S(0) - kTg]^ 



+ i pcok^T^y + [pgSj + ipga^S(O)- gM^Zg/N-gJ mzdz] o 



N 

 = -pgaQA[S(0)-kTQ] ^^ sin 9. sin (kag cos 9^ - ojt) [ 18d] 



i=l 



q/N+J mz^dz] (3 +(i puka^[S(9)- RTq]^ 



/[iMap + pS^ + Kq/N+J mz^dz](3+(i 



+ ipwk^T^)p + [pgS^ + ipga^S(O)- gM^Zp/N-gJ mzdzjp 



+ [pSi]xQ+ [ipc^k^T^Tjioj- 



N 



-gaQ A [S(0) - kTg] ^^ cos 9. sin (kaQ cos 9. - wt) 



i=l 



N 



+ 2pgkATj y cos (kaQ cos 9. - wt) [I8e] 



= P: 



25 



