Essays about: "mechanical wave propagation"

Found 4 essays containing the words mechanical wave propagation.

1. 1. Spacecraft dynamic analysis and correlation with test results : Shock environment analysis of LISA Pathfinder at VESTA test bed

   University essay from Luleå tekniska universitet/Rymdteknik

   Author : Beata Iwona Kunicka; [2017]
   Keywords : FEA FEM; finite element analysis; finite element method; mechanical analysis; structural analysis; dynamic analysis; computational dynamic analysis of structures; shock analysis; shock environment; shock test; shock test campaign; spacecraft dynamic analysis; MSC Nastran; MSC Patran; Dynaworks; Shock Response Spectrum; SRS; space engineering; space science and technology; mechanical engineering; structural engineering; analysis optimisation; analysis parametrisation; mechanical wave propagation; shock propagation; damping; hysteretic damping; viscous damping; structural damping;

   Abstract : The particular study case in this thesis is the shock test performed on the LISA Pathfinder satellite conducted in a laboratory environment on a dedicated test bed: Vega Shock Test Apparatus (VESTA). This test is considered fully representative to study shock levels produced by fairing jettisoning event at Vega Launcher Vehicle, which induces high shock loads towards the satellite. READ MORE

3. 2. Dual-Probe Shear Wave Elastography in a Transversely Isotropic Phantom

   University essay from KTH/Skolan för teknik och hälsa (STH)

   Author : Gioia Bassan; [2015]
   Keywords : Shear Wave Elastography; Transversely isotropic phantom;

   Abstract : Shear Wave Elastography (SWE) is an ultrasound based technique which is able to measure tissue stiffness through the speed of induced shear waves. Tissue stiffness is often related to pathological conditions and detecting mechanical changes can help the recognition of potential diseases. READ MORE

4. 3. Accuracy Assessment of Shear Wave Elastography for Arterial Applications by Mechanical Testing

   University essay from KTH/Hållfasthetslära (Avd.)

   Author : David Larsson; [2014]
   Keywords : Accuracy assessment; Arteries; Phantoms; Poly vinyl alcohol ; Mechanical testing; Shear Modulus; Shear Wave Elastography; Ultrasound;

   Abstract : Arterial stiffness is an important biometric in predicting cardiovascular diseases, since mechanical properties serve as indicators of several pathologies such as e.g. atherosclerosis. READ MORE

5. 4. Distance Laboratory Measurement of Signal Propagation in an Iron Bar

   University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

   Author : Yunfei Wang; Xi Zhang; [2012]
   Keywords : Distance laboratory; mechanical system; pressure wave; strain gauge sensor;

   Abstract : In the laboratory it should be possible to perform an impulse response experiment of the iron bar. A mechanical system for generating the impulse input the end of the iron bar should be developed. At the one end of the Iron bar there are strain gauge sensors and measurement amplifiers mounted. READ MORE