﻿154 



Mr. C. Rodgers on the Vibration 



10. The couple causing oscillatory motion will usually be 

 of a rotating type having components represented by the 



Fisr. 6. 



2-5 









rax 



.': 1". ■'.:!. • ■ 1 : > ', > ' i 



.. ...,_,....!. i : ,.j_.I .;...,... |._i..:. . . ,. ..._.^.L_ 



1 



: 



• 



• 



i ' i ' 



-_.Li_!:".U_.i 1 .: -.-.J : . : i/-i It i: - . 





r r 





■ 1 1 





!i_] 



; J j :' 



. | i. " 1 . ' l" ; l~~ : . !' "} .-: }-:[: ■". 





_ : 







** 



















_______ .. 



...i . . ..;... . ,. . /..[. ...]„L_ 





V't-r- 



r/ r " : i t "j 



•T-™p j ■ ' - 







S.-_o^_7-.7'\.7 Sr-jx«£^rT:~- ' 7 ;'7"" '" 







j , ! : ... ;.. . j ,'. 1 ... . 



hj< — l^te - 





.: ; . •: / ■ ■ 



h(A—~ i -j^ttfjf- 





--!■ ■ ; : i J, - : - ■ 



*°|n'-'2"T''~ 







• J • pr ; _ 



...... . _| 





y.jL.^...- . 









. /' ; "". i ' " ! 



..:_... ;.. _• .. . .. i . : ,• 



i'2 



; ! ; 



TP'l • : 





H 



ho 



_ [ ..'.'• ^ 







PPj- 













'9 



7.7- )_T~ 







*? 









1 



.... ,. . : J . . j 





..s.j 



■i 



7|7„ 



;„j-... 



T77] — 



... . :. . . . ... • . .|_al_J_!. 







"TT ~"~~ |~r~~ * •-' ; . 







tijttc 







'•' 



• ■ ! hi ! : ! ; 





! 6 

 l 1 



! : 

 Li L ; 



-:— | ■■--•- ;• ']'— ? ■ ■+•• ; ' f. - 





jftj- 



1 7 4 B :. /' I 















>:. .,.:/ T"_> ""V""^. -5 •_ 7 V""-?, /•X"'^ A3 ~* >.> /■_ ■ ^ ^.'; A ? -F 



1 



right-hand side of equations f54) and (55). It is, however, 

 conceivable that one of these components may be absent if 

 the disturbing couple is due to some external cause. Thus 

 if there is a couple round the x axis only, equations (54) and 



