. . "The fluid coupled cross-flown systems of bodies, as turbomachine blades in a cascade or tubes in a row, represented the main object of the performed research. Purpose of the work was determination of unsteady aerodynamic forces if among the displacements"@en . "2008-06-02+02:00"^^ . "Aeroelasticita v energetice s vlivem nelinearit" . . . . . . . "0"^^ . "Objektem zkoum\u00E1n\u00ED bude p\u0159\u00ED\u010Dn\u011B obt\u00E9kan\u00FD trubkov\u00FD svazek, p\u0159edev\u0161\u00EDm trubky jeho vstupn\u00EDch \u0159ad, kde jsou nejv\u011Bt\u0161\u00ED aerodynamick\u00E9 s\u00EDly a v\u00FDchylky vibrac\u00ED. \u00DAloha bude vy\u0161et\u0159ov\u00E1na p\u0159edev\u0161\u00EDm experiment\u00E1ln\u011B na fyzik\u00E1ln\u00EDch maket\u00E1ch, u nich\u017E nelinearity aerodynamick\u00FDch sil jsou doprov\u00E1zen\u00E9 nelinearitami konstrukce. P\u0159i m\u011B\u0159en\u00ED nutno respektovat tekutinovou vazbu mezi kmitaj\u00EDc\u00EDmi trubkami, zat\u00EDm co mechanick\u00E1 vazba bude zanedb\u00E1na. U trubek prvn\u00EDch \u0159ad svazk\u016F, zejm\u00E9na p\u0159i te\u010Dn\u00E9m n\u00E1b\u011Bhu, vstupuje do jevu samobuzen\u00FDch vibrac\u00ED je\u0161t\u011B siln\u00E9 turbulentn\u00ED buzen\u00ED, kter\u00E9 nutno separovat. Odd\u011Blen\u00ED stochastrick\u00FDch turbulentn\u00EDch sil a v\u00FDchylek od periodick\u00FDch aeroelastick\u00FDch sil a v\u00FDchylek se provede na b\u00E1zi toho, \u017Ee oba zm\u00EDn\u011Bn\u00E9 mecha- nizmi vz\u00E1jemn\u011B nekoreluj\u00ED. Metodou \u0159e\u0161en\u00ED bude bu\u010F mechatronick\u00FD princip, kter\u00FD \u0159e\u0161itel\u00E9 dosud pou\u017E\u00EDvali pro line\u00E1rn\u00ED vibrace trubkov\u00E9ho svazku, nebo metoda anal\u00FDzy dozn\u00EDvaj\u00EDc\u00EDch vibrac\u00ED trubek z\u00A0hlediska v\u00FD-chylek, rychlost\u00ED a zrychlen\u00ED. V\u00FDstupem budou matice tekutinov\u00FDch" . . "25"^^ . "25"^^ . "Objektem zkoum\u00E1n\u00ED byly p\u0159edev\u0161\u00EDm tekutinov\u011B v\u00E1zan\u00E9 soustavy p\u0159\u00ED\u010Dn\u011B obt\u00E9kan\u00FDch t\u011Bles, jako jsou lopatky turbostroj\u016F v\u00A0kask\u00E1d\u011B nebo trubek v\u00A0\u0159ad\u011B. C\u00EDlem bylo stanovit nestacion\u00E1rn\u00ED aerodynamick\u00E9 s\u00EDly na n\u011B p\u016Fsob\u00EDc\u00ED, zejm\u00E9na kdy\u017E mezi v\u00FDchylkami t\u011Bles a sil"@cs . "1"^^ . . . . . "0"^^ . "The object of examination will consist of transversally by-passed bundle of tubes, above all of first-row tubes where there are largest aerodynamic forces and vibration deviations. The task will be investigated mainly experimantally on physical mock-ups the aerodynamic forces non-linearities of which being accom- panied by structure non-linearities. In measurement the fluid coupling among vibrating tubes must be res- pected with the mechanical coupling being neglected. In first-row bundle tubes, especially with tangential inlet, a strong turbulent excitation which must be separated enters the phenomenon of self-excited vibrati-ons. Stochastic turbulent forces and deviations due to periodic aeroelastic forces and deviations will be se-parated as based thereupon that there is no mutual correlation of both mentioned mechanisms. The method of solution will be based either on mechanotronic principle which has been used yet for linear vibrations of tube bundle or on the method of tube vibration"@en . . "Aeroelasticity in power engeneering with influence of non-linearities"@en . . . . "Neuvedeno."@en . . . . "http://www.isvav.cz/projectDetail.do?rowId=GA101/02/1225"^^ . . "GA101/02/1225" .