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National Repository of Grey Literature 3 records found  Search took 0.01 seconds. 
Possible ways of reduction of the resistance of a body moving in liquids inspired by nature
 Krejčiřík, Stanislav ; Soukup, Lubomír (referee) ; Štigler, Jaroslav (advisor)
The bachelor´s thesis follows up the possible ways of body drag reduction, and it is inspired by nature. In the first part, basic theoretical concepts regarding bodies moving in liquids are described. Furthermore the thesis presents particular marine animals with developed mechanism for drag reduction. This includes dolphins, sharks and humpback whales. Possible technical and other applications are shown on these examples.
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Possible ways of reduction of the resistance of a body moving in liquids inspired by nature
 Krejčiřík, Stanislav ; Soukup, Lubomír (referee) ; Štigler, Jaroslav (advisor)
The bachelor´s thesis follows up the possible ways of body drag reduction, and it is inspired by nature. In the first part, basic theoretical concepts regarding bodies moving in liquids are described. Furthermore the thesis presents particular marine animals with developed mechanism for drag reduction. This includes dolphins, sharks and humpback whales. Possible technical and other applications are shown on these examples.
Detailed record
Analysis of eigen-values of viscously damped two degrees of freedom system due to changes of parameters of secondary subsystem
 Hračov, Stanislav ; Náprstek, Jiří ; Pospíšil, Stanislav
The paper deals with an analysis of non-classically damped two degrees of freedom system from the point of view of eigen-values. The theoretical relations between the system parameters for the case of multiple complex eigen-values were derived. The parametric problem was carried out analytically and graphically. The influence of the relative frequency tuning on the overdamping of individual eigen-values with increasing of the secondary damping was studied. The overdamping intervals were defined with respect to the mass ratio and the frequency tuning. The boundaries between respective overdamping intervals represent among others the frequency tuning of system with multiple complex eigen-values. The phase between components of eigen-modes and its relation to the eigen-values were examined with respect to the secondary damping increase.
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