Sökning: "random vibration"

Visar resultat 1 - 5 av 15 avhandlingar innehållade orden random vibration.

1. 1. Prediction of random vibration using spectral methods

   Författare :Fredrik Birgersson; KTH; []
   Nyckelord :Spectral finite element method; distributed excitation; turbulent boundary layer measurements; random vibration; spectral super element method; wave expansion difference scheme; fluid-structure interaction;

   Sammanfattning : Much of the vibration in fast moving vehicles is caused bydistributed random excitation, such as turbulent flow and roadroughness. Piping systems transporting fast flowing fluid isanother example, where distributed random excitation will causeunwanted vibration. LÄS MER

3. 2. Statistical Energy Analysis and the Individual Case

   Författare :Claes Fredö; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; indirect couplings; random vibration; substructuring; transmission; statistical energy analysis; energy flow; theory; three subsystem;

   Sammanfattning : For many years, one of the most used methods for vibro-acoustic analysis of transmission of Structure-Borne Sound in complex built up structures has been the method of Statistical Energy Analysis (SEA). SEA has many advantages that makes it attractive for engineering use. LÄS MER

4. 3. Constitutive models of magneto-sensitive rubber under a continuum mechanics basis and the application in vibration isolation

   Författare :Bochao Wang; Leif Kari; Ines Lopez Arteaga; Vincent Coveney; KTH; []
   Nyckelord :Magneto-sensitive rubber; magnetic dependency; frequency dependency; amplitude dependency; temperature dependency; vibration isolation; Engineering Mechanics; Teknisk mekanik;

   Sammanfattning : Due to its durability, stretchability, relatively low stiffness and high damping, rubber is widely used in engineering anti-vibration fields. However, a major deficiency is that once installed, the mechanical properties of traditional rubber-based devices are fixed where its adaptability to various loading conditions is poor. LÄS MER

5. 4. Energy absorption and transmission in the hand and arm during high frequency vibration and impact

   Författare :Anna Sörensson; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknisk akustik; Engineering Acoustics;

   Sammanfattning : There has been discussion in international literature as to whether vibration containing impact and high frequencies, i.e. above 1000 Hz could make a special contribution to injuries in the hand and arm. LÄS MER

7. 5. Vibrational energy harvesting for sensors in vehicles

   Författare :Johan Bjurström; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; piezoelectric; anti-resonance; electromagnetic induction; prescribed displacement; low frequency; nonlinear dynamics; small amplitude excitation; automotive safety; vibration energy harvesting; unified modeling;

   Sammanfattning : The miniaturization of semiconductor technology and reduction in power requirements have begun to enable wireless self-sufficient devices, powered by ambient energy. To date the primary application lies in generating and transmitting sensory data. LÄS MER