Essays about: "transient vibration analysis"

Showing result 1 - 5 of 7 essays containing the words transient vibration analysis.

1. 1. Wood and moisture-induced strains in a large deformation setting in 3D

   University essay from Linnéuniversitetet/Institutionen för byggteknik (BY)

   Author : Fredrik Ström; Anwar Obeido; [2022]
   Keywords : Total Lagrangian; Finite element method; Large deformation theory; Deformation gradient decomposition; Moisture-induced strains; Hygroscopic; Orthotropic.;

   Abstract : Many studies have previously been done on moisture-induced strains in wood. An in- finitesimal/engineering strain model has been used for most of these studies, which is often an accurate approximation for small rotations. However, if large deformations oc- cur, then fictive strains are obtained resulting from the simplified engineering strain. READ MORE

3. 2. Transmission of Vibrations in Precast Concrete Slabs

   University essay from Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

   Author : Adam Oskarsson; [2020]
   Keywords : Vibration; Concrete; Transmission; Precast;

   Abstract : Dynamic loads have historically not been a troubled area for concrete floors, foremostbecause of the high self-weight compared to the dynamic load. With new technical andcalculation achievements during the last decades concrete floors have become longerand more slender. READ MORE

4. 3. Transient and Spectral Fatigue Analysis for Random Base Excitation

   University essay from

   Author : Albin Bäckstrand; Prithviraj Madhava Acharya; [2019-09-16T10:43:03Z 2019-09-16T10:43:03Z 2019 2019]
   Keywords : Spectral fatigue analysis; transient fatigue analysis; power spectral density PSD ; transfer function; base excitation; Dirlik s empirical formula; equivalent von Mises stress EVMS ; rainflow count; Wang and Brown s method; Dang Van equivalent stress; Palmgren-Miner rule;

   Abstract : This thesis work gives an insight on how to estimate the fatigue damage using transient and spectral fatigue analysis for both uniaxial and multiaxial stress states in case of random vibration base excitation. The transient method involves a rainflow count algorithm that counts the number of cycles causing the fatigue damage, while the spectral method is based on probabilistic assumptions from which an expected value of fatigue damage can be estimated. READ MORE

5. 4. Numerical analysis of aerodynamic damping in a transonic compressor

   University essay from KTH/Skolan för industriell teknik och management (ITM)

   Author : Vincenzo Stasolla; [2019]
   Keywords : transonic compressor; flutter; vibration; CFD; transonic kompressor; fladder; vibration; CFD;

   Abstract : Aeromechanics is one of the main limitations for more efficient, lighter, cheaper and reliable turbomachines, such as steam or gas turbines, as well as compressors and fans. In fact, aircraft engines designed in the last few years feature more slender, thinner and more highly loaded blades, but this trend gives rise to increased sensitivity for vibrations induced by the fluid and result in increasing challenges regarding structural integrity of the engine. READ MORE

6. 5. Traffic Induced Vibrations at Road-Bridge - Experimental and Numerical Analysis

   University essay from Lunds universitet/Väg- och vattenbyggnad (CI); Lunds universitet/Byggnadsmekanik

   Author : Oskar Baggens; [2012]
   Keywords : Technology and Engineering;

   Abstract : In the north-east part of Lund, Sweden, the MAX IV facility is (in the event of writing this thesis) under construction. MAX IV is a synchrotron radiation facility which has a high requirement regarding low vibrations. Within this thesis a nearby road-bridge for the highway E22 was studied using experimental and numerical methods. READ MORE