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Národní úložiště šedé literatury Nalezeno 2 záznamů.  Hledání trvalo 0.01 vteřin. 
Simulation of ultrasonic wave in the composite aircraft structures
 Cimrhanzl, Jan ; Koštial, Rostislav (oponent) ; Šplíchal, Jan (vedoucí práce)
In the present thesis, SHM methods used in aviation are described, and series of FEM simulations of UGW propagation in the thin-walled composite aircraft structure have been performed. For the simulation, pitch-catch SHM method is used. Experimental simulations are performed on two panels from a different material, and each of those two materials is tested with three configurations of crack and one configuration without a crack. For the simulation preprocessor MSC.Patran and two post processors MSC.Nastran and MSC.Dytran are used for comparison of results. Simulations showed that cracks in the panel are affecting velocity and amplitude of waves. In configurations with crack, velocity and amplitude are lower than in the case without a crack. In FEM simulations, post processor MSC.Nastran showed more accurate and easier data for reading for further study of UGW propagation.
Úplný záznam
Simulation of ultrasonic wave in the composite aircraft structures
 Cimrhanzl, Jan ; Koštial, Rostislav (oponent) ; Šplíchal, Jan (vedoucí práce)
In the present thesis, SHM methods used in aviation are described, and series of FEM simulations of UGW propagation in the thin-walled composite aircraft structure have been performed. For the simulation, pitch-catch SHM method is used. Experimental simulations are performed on two panels from a different material, and each of those two materials is tested with three configurations of crack and one configuration without a crack. For the simulation preprocessor MSC.Patran and two post processors MSC.Nastran and MSC.Dytran are used for comparison of results. Simulations showed that cracks in the panel are affecting velocity and amplitude of waves. In configurations with crack, velocity and amplitude are lower than in the case without a crack. In FEM simulations, post processor MSC.Nastran showed more accurate and easier data for reading for further study of UGW propagation.
Úplný záznam

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