Essays about: "Vibration dynamics"

Showing result 16 - 20 of 53 essays containing the words Vibration dynamics.

1. 16. Using CFD to investigate casue of vibrations in feed-water system

   University essay from KTH/Strömningsmekanik och Teknisk Akustik

   Author : Maryam Dabbaghitehrani; [2019]
   Keywords : ;

   Abstract : Computational fluid dynamics from large scale thermo-hydraulic simulation in 1D to large eddy simulation in 3D, were applied in this master thesis to study cause of vibrations in a feed-water system downstream the connected pumps. In the first step, the fluid flow of the pumps in RELAP5 simulations was disturbed by the blade passing sinusoidal vibrations to study their propagation in the piping system over time. READ MORE

3. 17. Vibration Testing of Short Fibre Reinforced Polymer Composites

   University essay from KTH/Lättkonstruktioner

   Author : Ben Morrissey; [2019]
   Keywords : ;

   Abstract : Applications of short fibre reinforced polymer composites (SFRPCs) have been rapidly increasing and most of the components made of these materials are subjected to cyclic loading. In automotive applications, “under the hood” is the harshest environmental condition for plastic-based materials with temperatures ranging from -40°C to 120°C. READ MORE

4. 18. Experimental Investigation of Added Mass and Damping on a Model Kaplan Turbine for Rotor Dynamic Analysis

   University essay from Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

   Author : Timmy Nyman; [2018]
   Keywords : Added mass; added damping; rotor dynamics; kaplan turbine; vibrations; fluid dynamics;

   Abstract : The concept of added hydrodynamic properties such as added mass is of importance in modern hydropower development, mainly for rotor dynamic calculations. Added mass could result in reduced natural frequencies and altered mode compared to existing simulation models. READ MORE

5. 19. Train Induced Vibration Analysis of an End-frame Bridge : Numerical Analysis on Sidensjövägen

   University essay from KTH/Bro- och stålbyggnad

   Author : Niklas Wiberg; Jasmin Halilovic; [2018]
   Keywords : Accelerations; Dynamics; End-frame bridge; FE-modeling; Frequency response function; High-speed railway; Soil structure interaction; Train induced vibrations; 2D 3D;

   Abstract : Higher speeds and higher capacity will cause the Swedish rail network to be exposed to disturbing dynamic effects. Higher speeds cause higher vertical acceleration levels of the bridge deck. In this thesis, a numerical analysis of a three span end-frame bridge subjected to train induced vibrations is performed. READ MORE

6. 20. VIBRATION ANALYSIS OF THE FLUE GAS FAN IN MÄLARENERGI’S UNIT 6 : Troubleshooting using CFD simulations in ANSYS to locate the origin of the vibration spikes and suggest solutions for a more optimized performance

   University essay from Mälardalens högskola/Akademin för ekonomi, samhälle och teknik

   Author : Felix Brogren; Peter Gustafsson; [2018]
   Keywords : Troubleshoot; CFD simulation; spectrum analysis; flow-induced vibration; vibrations in machinery; Felsökning; CFD-simulering; spektrum analys; flödesinducerad vibration; vibrationer i maskiner;

   Abstract : The purpose of this study is to investigate the flue gas fan in Mälarenergi’s Unit 6 and try to find what is causing the vibrations increase. The Fast Fourier transform (FFT) method was used for this degree project. A comparison was made with previous studies using FFT in order to pinpoint the source of the problem with vibrations. READ MORE