Kod postojećih mašina i uređaja za transportovanje čvrste mase pomoću oscilatornih platformi, osnovni zahtevi koje treba ispuniti u toku rada jesu: maksimalan transport, maksimalno razbijanje (usitnjavanje) i maksimalna separacija (izdvajanje) pojedinih komponenetnih sastojaka iz čvrste mase. Poznata je činjenica da je vlažnost zemljišne mase w iskazana u % jedan od najuticajnijih faktora od koga zavise njen transport, separacija i proseja-vanje kroz rešetku (sito) oscilatorne platforme. Najbolji radni efekti postižu se pri radu sa suvom i mekom zemljom bez prisustva čvrstih grudvi. Takva zemljana masa korišćena je u toku eksperimentalne faze istraživanja, koju je autor disertacije realizovao na prototipu oscilatorne platforme na Tehničkom fakultetu u Čačku i na Institutu za krompir u Guči, za vreme izrade svog magistarskog rada 1995. godine [1]. Pod takvim okolnostima platforma je uvek besprekorno obavljala predviđenu radnu funkciju. Međutim, iskustvo iz eksploatacije stečeno u protekle dve decenije pokazalo je da problemi u radu oscilatorne platforme nastupaju nakon obilnih kiša, tj. onda kada se vlažnost zemlje w jako poveća. Tada je efekat transporta i separacije najslabiji, zbog lepljenja vlažne zemlje za raonik koji je u tom slučaju veoma teško podkopava. U pojedinim ekstremnim slučajevima, dolazilo je i do potpunog onemogućavanja rada platforme. Od početka šezdesetih godina prošlog veka, veći broj autora u svetu bavio se konkretnom problematikom povećanja radne sposobnosti platformi, mahom namenjenih za sitnozrnaste i suve materijale. Teorijske osnove rada ovakvih platformi mogu se naći u odgovarajućoj literaturi [2, 3, 4]. Njihovi fizički modeli imali su svoj razvojni - dijalektički put i to počev od najjed-nostavnijih sa jednom ili dve mase međusobno povezane elastičnim vezama [5, 6], pa do najsloženijih modela kod kojih je izvršena optimizacija najuticajnijih radnih parametara [7, 8, 9, 10]. Međutim, svi navedeni modeli odnose se uglavnom na transportovanje suve, najčešće zemljane mase i isti mogu biti dobra polazna osnova za formiranje modela oscilatornih platformi za transport vlažnih materijala. Stoga je autor disertacije došao na ideju da obavi jedno novo teorijsko i praktično istraživanje spomenute problematike, kojim bi se ustanovilo kakav bi bio rad oscilatorne platforme u ekstremno teškim radnim uslovima i to kod maksimalno vlažne i plastične zemlje (tzv. "teške ilovače"). Istraživanjem je trebalo prihvatiti ili odbaciti postavljene hipo-teze, imajući u vidu sve relevantne faktore tj. parametre koji utiču na rad oscilatornih platformi. Nakon realizacije celokupnog istraživanja koje je sprovedeno u dve faze- teorijskoj i eksperimentalnoj, pristupilo se elaboraciji i analizi dobijenih rezultata. Potom su usledili tabeliranje i prezentacija dobijenih rezultata, kako bi isti bili dostupni što širem krugu potencijalnih korisnika. Rezultati i zaključci dobijeni jednim ovakvim kompleksnim istraživa-njem sigurno bi mogli korisno poslužiti za modifikaciju već postojećih, a takođe i za izradu potpuno novih mašina i uređaja koje u svom radu koriste oscilatorne platforme za separaciju i prosejavanje vlažne zemljišne mase. Stoga su na kraju ove disertacije i izneti konkretni predlozi i preporuke za neka nova, buduća istraživanja spomenute problematike. For existing machines and devices for transporting solid mass using oscillatory platforms, the basic requirements that must be met during operation are: maximal transportation, maximal breaking (fragmentation) and maximal separation (segregation) of each component from the solid mass. It is known a fact that the humidity of the land mass w expressed in % is one of the most influential factors from which depends its transportation, separation and sieving through the grille (sieve) of oscillatory platform. The best working effects are achieved when working with dry and soft earth without the presence of solid pieces. Such land mass was used during the experimental phase of the research, which the author of the dissertation realized on the prototype of oscillatory platform at the Technical Faculty in Čačak and at the Institute of potato in Guča, during the drafting his MA thesis in 1995. [1]. Under such circumstances, the platform was always perfectly performed anticipated operating function. However, the experience acquired from the exploitation in the past two decades has shown that problems in the work of oscillatory platforms appear after heavy rains, i.e. when the soil moisture w is greatly increased. Then the effect of transportation and separation is the weakest, due to sticking moist earth for ploughshare, because the ploughshare in this case a very hard to undermines moist eart. In some extreme cases, occurred a complete disabling work of the platform. Since the beginning of the sixties the last century, great number of authors in the world dealt with the specific problems of increasing the working abilities of platforms, mainly intended for fine-grained and dry materials. Theoretical basis of operation of these platforms can be found in the relevant literature [2, 3, 4]. Their physical models had their developmental-dialectical trend starting from the simplest with one or two masses interconnected by elastic connections [5, 6], to the most complex models which have been subjected to optimization of the most influential operating parameters [7, 8, 9, 10]. However, all mentioned models relate mainly to the transport of dry, mostly earthen mass and they may be a good starting point for creation of models the oscillatory platforms for transportation of moist material. Therefore, the author of the dissertation got the idea to do a new theoretical and practical research the mentioned problems, by which it can be established what would be the work of oscillatory platform in extremely difficult working conditions, primarily in the case of maximal wet and plastic land mass (so called "heavy loam"). By using investigations, it was to be accept or reject the proposed hypotheses, having in mind all relevant factors, i.e. parameters which affect the work of oscillatory platform. After realization of whole research, which was conducted in two phases - theoretical and experimental, next step was elaboration and analysis the obtained results. Then followed the tabulation and presentation the obtained results, with the aim that they be available to a wider range of potential users. The results and conclusions obtained by means one such complex research can surely serve useful for modification already existing, and also for the development of a completely new machines and devices which in their work using oscillatory platforms for separation and sieving of wet land mass. Therefore, some particular proposals and recommendations are listed at the end of this dissertation for a new, future research the aforementioned problems.