" divergence" . . . . "Cylindrical shell; flowing fluid; shell in interaction with fluid; natural frequencies; frequency spectrum; mode shape of vibration mode; boundary conditions; aeroelastic stability; critical flow velocity; divergence; futter; FEM"@en . . . . . . "25"^^ . . . "25"^^ . "Natural vibration and stability of shells in interaction with flowing fluid"@en . . " natural frequencies" . . . . "The frequency-modal characteristics of aeroelastic systems were studied, especially for cases with unsymmetric boundary conditions. The analysis of stability and physical interpretation of the solution when aerodynamic damping can arise due flowing flow."@en . "http://www.isvav.cz/projectDetail.do?rowId=IAA2076101"^^ . " futter" . " boundary conditions" . " aeroelastic stability" . "The project is a continuation of the aeroelasticity research realised at the IT recently and will be oriented on the mechanical engineering applications. Analytical and numerical methods for solving problems of the natural vibration of shell structures (such as cylinder, sphere or a plate) in interaction with flowing fluid will be developed on the base earlier obtained results. The attention wil be focused on the studies of frequency-modal characteristics of these systems, the analysis of the interaction phenomena and the stability boundaries. The obtained results will be compared for variation of the velocity and the density of the flowing fluid in the relation to the material and geometrical parameters of the elastic structure. Within the framework of the developed new algorithms and numerical codes the influence of the different types of the boundary conditions of the conveyed shell structures on the their aeroelastic instability and dynamic characteristics will be investigated."@en . " flowing fluid" . "1"^^ . " mode shape of vibration mode" . . . "0"^^ . "0"^^ . "Cylindrical shell" . "V\u00FDznamn\u00E9ho teoretick\u00E9ho v\u00FDsledku bylo dosa\u017Eeno v p\u0159\u00EDpad\u011B v\u00FDzkumu stability aeroelastick\u00FDch soustav: byla dok\u00E1z\u00E1na nestabilita v\u00E1lcov\u00FDch st\u0159epin prot\u00E9kan\u00FDch tekutinou v p\u0159\u00EDpad\u011B nesymetrick\u00FDch okrajov\u00FDch podm\u00EDnek p\u0159i jak\u00E9koliv mal\u00E9 rychlosti proudu."@cs . . " critical flow velocity" . "Vlastn\u00ED kmit\u00E1n\u00ED a stabilita sko\u0159epin v interakci s proud\u00EDc\u00ED tekutinou" . " shell in interaction with fluid" . "2007-09-26+02:00"^^ . . "Navrhovan\u00FD projekt navazuje na v\u00FDzkum v oboru aeroelasticity, kter\u00FD byl prov\u00E1d\u011Bn v \u00DAstavu termomechaniky v uplynul\u00FDch letech a bude zam\u011B\u0159en p\u0159edev\u0161\u00EDm na stroj\u00EDrensk\u00E9 aplikace. S vyu\u017Eit\u00EDm d\u0159\u00EDve z\u00EDskan\u00FDch v\u00FDsledk\u016F budou rozv\u00EDjeny analytick\u00E9 a numerick\u00E9 metody \u0159e\u0161en\u00ED problematiky vlastn\u00EDho kmit\u00E1n\u00ED sko\u0159epinov\u00FDch konstrukc\u00ED (v\u00E1lec, sf\u00E9ra, deska) v interakci s proud\u00EDc\u00ED tekutinou se zam\u011B\u0159en\u00EDm na studium frekven\u010Dn\u011B-mod\u00E1ln\u00EDch vlastnost\u00ED t\u011Bchto soustav, anal\u00FDzu interak\u010Dn\u00EDch jev\u016F a stanoven\u00ED hranic stability soustavy v z\u00E1vislosti na rychlosti a hustot\u011B proud\u00EDc\u00ED tekutiny ve vztahu k materi\u00E1lov\u00FDm a geometrick\u00FDm parametr\u016Fm pru\u017En\u00E9ho t\u011Blesa. V r\u00E1mci rozpracovan\u00FDch algoritm\u016F a v\u00FDpo\u010Detn\u00EDch program\u016F (p\u0159edev\u0161\u00EDm v jazyce FORTRAN a MATLAB) budou studov\u00E1ny zejm\u00E9na vlivy r\u016Fzn\u00E9ho typu upevn\u011Bn\u00ED obt\u00E9kan\u00FDch konstruk\u010Dn\u00EDch element\u016F na jejich aeroelastickou nestabilitu a dynamick\u00E9 charakteristiky." . . . " frequency spectrum" . "IAA2076101" . .