الفهرس 
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Abstract
TM iM 1a UJuD8iou of IIOQl’Ia 1: 8h1pa. a1Doe tbe d or the 8.0* World .go. ’tos.th.r w1 th 1dte hi.p.zt OUtput. of tuil’ pr’OIJula1v. plm’ta, h rai nu8 ’t’ebn1cal pn1lle. ’to PipWilpn. .ong ’tU p:-obl tM’t cu be CiiJ” 11ft tUe’ eeooe Yibti.ona. a field ha. been tu G.je __ of exta81stuck urdnSat 1teer UIlderPed .• iDI 1;Ut pbeuaau. (1) la ft~ 7 ’th. 4 1.puat of tanke~s ha- rtl\llt., iA tu .yelu1;1on of two II&1a iankeZ” ea~.50.l’1e.. 0».. ”mpr18.a the larr;. aiM ttDk.,r •• intq.4M fer ’tM tnn~ort of crude 011. a the 011 fields to ~h. r.tr1 Thee. are ’iDs ~l ’t 111 still bi6S.:r and b1gg lU)1 ts. Tha oth.1” eat.sU7 i,acl”,d the amaller product carriers. of app%’oxilU.t.l,.. 20.000 dwt t intended tor the U..tri”ution of the rofiut oil. [2 J torm.r .c&t.soQ’, ~VWI rene •• nti.D& the lup t e !la. reached a .tag. U tn.1r ”.aip 1.&d~ ~ I1.Cly tftD4ucU.sed cAu~:1st.1e I1; .ia mancla1;0J:7 thP, @G ’Po ta. ua.o14Ul lutilJit1e. as well as .Xe1’taJii.oP81 nWa.tiOOBt hOwey6r 1(Q.o 1rable and troubl • .,ome, will &1Jnost e.u’t&inJJr ccUr ih praetioe. Prae .• tioeJ. e1-.ce 6thoW.O that the inc.reu~ ma1a engine output. f requ.iHd tor the propulsion of medern motorehiP8, by aean8 of slow-spee4 direot17-00upled engines” as well as tb.. ’teJ&4enoy towU’d. the appUc4tioD. of aft-end installations resultil:2g in sboZ”ter l&n&’ths of aha.tt~J mq lead to the occuranee of complicated vibre.t1on phtuollena in the ahat’tille; ”y8’teDl’. The dynamic properties of shafting, the elastic b.UTiour of boUiJl&8 and the V1.b1’e.tOr1 component. of ensiDe &Ad p.rop4J force. mq oause i.n&4a1s.ti\lU 1;orsianal, axie.l as well a. lat&l’a1 Yibrationa ~ oec~ at speeds vd thin the engi ne 111anoeuvriDS range. Moreover, the pre sent level of tns’tall.d ongine power do 110t 01117 require the avoidance of the reoonanee phenomona, but also the d.t.~1!a’t1on of the forc.4 vtbra1;1on. undar service condi t10na j.n oN.r to detect. dlnaJlic O’Yuloa4& due ’to fatigue. The characteristies and behaviour, under O\a’t Dt. ~8OG.J’-04eJt be C&J)aide~aa:dou~ V. Aa a result, ’the reliabili.’t7 of the propulsion plant, as well u probl rel~ to o .&:tat,. of 8ys1iem.. and 4”819’., eu. ot .aa”t&Il811~ Cd the availa.ili1iy ot sparClsbeoCd more antI IIOre i.aponut. 8~ ~stCle.8 direQtil,. speak ill favour ot solutioJ).s w1tih on •• or moret direetl:r·co\1PJA4 D1.e861 eDi1J2.os [2) •