| Title |
Dynamics of rigid bodies in fluid and limit eigenmodes; theoretical research / |
| Another Title |
Kietųjų kūnų dinamika skystyje ir ribinės savosios formos; teoriniai tyrimai. |
| Authors |
Kargaudas, V ; Augonis, M |
| Full Text |
|
| Is Part of |
Mechanika.. Kaunas : Technologija. 2006, Nr. 4, p. 40-44.. ISSN 1392-1207. eISSN 2029-6983 |
| Abstract [eng] |
Interaction between ideal incompressible fluid and a rigid body, submerged into the fluid, is investigated. If rigid bodies are not fastened together by mechanical connections the interaction of the bodies is possible only if the fluid is present. The case when several bodies are identical and their supports are the same is investigated: eigenfrequencies of these bodies in vacuum coincide. If density of the fluid approaches zero then all eigenfrequencies of the structures in the fluid approaches eigenfrequencies of the same structures in vacuum. In the paper it is given a proof that eigenmodes in the fluid can be completely different from eigenmodes in vacuum and do not approach eigenmodes in vacuum. The reason of this paradoxical distinction between the eigenfrequencies and the eigenmodes is presented. It is revealed, that the limit eigenmodes and the vacuum eigenmodes are different when eigenfrequencies of several bodies in vacuum coincide. This investigation can be significant if forced vibrations frequency of such mechanical system is resonant. |
| Published |
Kaunas : Technologija |
| Type |
Journal article |
| Language |
English |
| Publication date |
2006 |
| CC license |
|
