Essays about: "rayleigh damping"

Found 5 essays containing the words rayleigh damping.

1. 1. Numerical Investigations of a Partitioned FSI Algorithm for Tetra Pak's Filling Tube

   University essay from Lunds universitet/Institutionen för energivetenskaper

   Author : Leo Andersson; [2016]
   Keywords : fluid-structure interaction; FSI; added mass effect; partitioned implicit scheme; stability; Rayleigh damping; grid flux under-relaxation; Technology and Engineering;

   Abstract : Numerical simulations of fluid-structure interaction of a water-filled tube with a free surface are conducted using an implicit partitioned coupling scheme. Abaqus and STAR-CCM+ are used for the solid- and fluid domains respectively. This application has stability issues, with the most severe turning out to be the added mass effect. READ MORE

3. 2. Influence of Fluid Structure Interaction on a Concrete Dam during Seismic Excitation : -Parametric analyses of an Arch Dam-Reservoir-Foundation system

   University essay from KTH/Betongbyggnad

   Author : Rikard Hellgren; [2014]
   Keywords : seismic; fluid-structure interaction; arch dam; concrete; finite element analysis; jordbävning; fluid-struktur interaction; valvdamm; betong; finit element analys;

   Abstract : The aim of this study is to investigate how Fluid-Structure interaction is included in numerical earthquake analyses of dams. The base for this project is theme A from the 12th international benchmark workshop on numerical analysis of dams, which was held in October 2013. READ MORE

4. 3. Numerical simulations of energy absorbing boundaries for elastic wave propagation in thick concrete structures subjected to impact loading

   University essay from Institutionen för fysik

   Author : Daniel Olsson; [2012]
   Keywords : Numerical simulations; elastic media; wave propagation; concrete; impact loading; energy absorbing boundaries; longitudinal; primary wave; secondary wave; shear; Rayleigh damping; Rayleigh wave;

   Abstract : As many of the world’s nuclear power plants are near the end of their supposed life span a need arise to assess the components crucial to the safety of these plants. One of these crucial components is the concrete reactor confinement; to assess its condition, non-destructive testing (NDT) is an attractive method. READ MORE

5. 4. Determining the pressure distribution on submerged 2D bodies using dissipative potential flow.

   University essay from KTH/Marina system

   Author : Mirjam Fürth; [2011]
   Keywords : ;

   Abstract : Globalization is reaching the furthest corners of the world and with globalizations comes a rising demand on transportation. In shipping; a significant cost both to the ship owners and the environment are the fossil fuels used for propulsion, even a small reduction in the wave resistance can bring considerable reductions both in operating costs and emissions for such ships. READ MORE

6. 5. Influence of Mode Dependent Rayleigh Damping on Transient Stress Response

   University essay from Blekinge Tekniska Högskola/Avdelningen för maskinteknik

   Author : Ganesh M Kandge; [2007]
   Keywords : FEDEM; Structural damping; Rayleigh Damping; FRF; Dynamic Simulation of Flexible Mechanisms; Relative damping; Modal Analysis; Structural Analysis.;

   Abstract : Main task of thesis is to study the effect of Mode dependent Rayleigh damping on System response. Damping ratio for the structure is not constant for all modes and it varies mode wise. In present task different damping models are defined and used to obtain responses for transient system. READ MORE