National Repository of Grey Literature 33 records found  beginprevious14 - 23next  jump to record: Search took 0.00 seconds. 
Reliability assessment of CAMASUC method
Pirner, Miroš ; Urushadze, Shota
The ChAnge of MOde SUrface Curvature - CAMOSUC - was applied to the identification of the imperfection of a structure and its location about 1990, as stated by the authors of the method.
SBRA method and the development of its application
Půstka, D. ; Marek, Pavel
Tento příspěvek obrací pozornost na potenci l metody SBRA, zvláště u ocelových konstrucí. Plně pravděpodobnostní řešení daného problému je tu ukázáno na dvou příkladech. Na ocelovém nosníku ovlivněném korozí a na akumulaci poškození únavou na ocelových podpěrách namáhaných větrem. 295 This paper turns attention to the potential of the simulation based reliability assessment method SBRA, considering especially the durability assessment of steel structures. A fully probabilistic approach is demonstrated using two examples. A steel component is exposed to time dependent effects of corrosion and assessment of the accumulation fatigue damage.
Empirical mode analysis of the non-stationary response of the structure vibrating in the wind
Pospíšil, Stanislav ; Náprstek, Jiří
The paper describes the new method of analysis of the response of structure in the wind.
Dynamics of a spherical vibration absorber
Náprstek, Jiří ; Pirner, Miroš
Wind excited vibrations of slender structures can be reduced using assive vibration absorbers. If there is available only a limited vrtical space to install such a device, a spherical type of absorber can be recommended.
Reliability Analysis using Monte Carlo Simulation and Bounded Histograms of Input Random Variables
Václavek, L. ; Marek, Pavel
Probabilistic simulation based method SBRA is apllyed in safety and serviceability assessment of a planar steel frame. The reliability is expresed by comparing the calculated probability of failure and the target probability contained in codes.
Vibrations of a gable of a church excited by ringing
Fischer, Ondřej ; Urushadze, Shota
The gable is of triangular shape, not being supported horizontally by the roof or any other stiffening structure. The measurements revealed that the bells excite the vibrations of towers and of the basement of the gable with moderate amplitudes, while the cantilever of the gable wall apmlifies the motion by the resonance - effect.
Development of testing equipment for measuring mechanical properties of cancellous bone
Jiroušek, Ondřej ; Jírová, Jitka ; Vavřík, Daniel
Development of experimental procedures used for evaluation of mechanical properties of cancellous bone using small samples of cylindrical shape. Both the compressive and tensile specimens are tested while for the strain measurement an optical method utilizing CCD camera of high resolution is used. The procedure is used to assess the relationship between the apparent density of the cancellous bone in Hounsfield units obtained from computer tomography scans and viscoelastic material properties used in finite element modeling of whole bones.
Non destructive observation of damage processes by X-Ray dynamic defectoscopy
Vavřík, Daniel ; Jakůbek, J. ; Pospíšil, S. ; Visschers, J. ; Zemánková, Jaroslava
The subject of this work is experimental observation of the development of internal damage and its evolution in aluminium alloy flat specimens with different configurations of the pre crack. We propose direct and non-destructive observation of the material damage evolution by measuring changes in transmission of X-rays penetrating a stressed material, using a single photon counting X-ray imager, called Medipix 1.
Large deformation - large amount of unknown
Fiala, Zdeněk
Finite deformations are exposed from a viewpoint of differential geometry. From this perspective infinite dimensional Riemannian geometry of Riemannian metrics is emplyed to propose novel objective time derivative by means of covariant derivative.

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