1–20 von 79 Ergebnissen
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    Visualization of vehicle interior sound field using Nearfield Acoustical Holography based on the Helmholtz-Equation Least-Squares (HELS) method

    Moondra, Manmohan S. / Wu, Sean F. | Tema Archiv | 2005
    This paper examines the application of Nearfield Acoustical Holography based on the Helmholtz Equation Least-Squares (HELS) method for ...
    Schlagwörter: Helmholtz-Gleichung

    Visualization of acoustic pressure radiation from complex vibrating structures

    Rayess, N. / Wu, S.F. | Tema Archiv | 1999
    This paper demonstrates visualization of the radiated acoustic pressures from a complex structure by using the Helmholtz Equation Least ...
    Schlagwörter: Helmholtz-Gleichung

    Vibro-acoustic simulations of ships by coupled fast BE-FE approaches

    Brunner, Dominik / Junge, Michael / Wilken, Marc et al. | Tema Archiv | 2009
    comparing the solutions of the Helmholtz and the Laplace equation. The ship itself is modeled with the finite element method. A binary interface to ...
    Schlagwörter: Helmholtz-Gleichung

    Vibro-acoustic noise control treatments for payload bays of launch vehicles: Discrete to fuzzy solutions

    Howard, Carl Q. / Hansen, Colin H. / Zander, Anthony | Tema Archiv | 2005
    tuned mass dampers placed on the structure and Helmholtz resonators placed in the cavity. Most of the results presented in the literature show ...
    Schlagwörter: Helmholtz-Resonator

    Verkehrszustand als Basis für adaptive Fahrerassistenz am Beispiel der Autobahnauffahrt

    Buld, Susanne / Hoffmann, Sonja / Totzke, Ingo et al. | Tema Archiv | 2006
    psychologischer Einrichtungen (DLR, IZVW und ika), das von der Helmholtz-Gemeinschaft über drei Jahre gefördert wurde. Für das Auffahren auf die Autobahn ...

    Vehicle noise investigation using spatial transformation of sound fields

    Hald, J. / Ginn, J.B. | Tema Archiv | 1987
    intensity by means of acoustical holography while the more distant fields can be determined by application of Helmholtz' integral equation. A ...

    Validation of a zonal approach computing the sound radiation from lined ducts

    Buske, Clemens / Richter, Christoph / Thiele, Frank et al. | Tema Archiv | 2010
    impedance boundary condition based on the extended Helmholtz resonator model and the Ingard-Myers boundary condition is implemented in the ...

    Validation of a numerical method for extracting liner impedance

    Watson, W.R. / Jones, M.G. / Tanner, S.E. et al. | Tema Archiv | 1996
    Schlagwörter: Helmholtz-Gleichung

    Untersuchungen zur Dynamik laminarer Ablöseblasen mit der zeitauflösenden Particle Image Velocimetry

    Hain, Rainer | Tema Archiv | 2008
    ausgerichteten Lichtschnitt durchgeführt. Durch die flächenhaften zeitaufgelösten Messungen können die Kelvin-Helmholtz Instabilitäten aufgelöst und als ...
    Schlagwörter: Kelvin-Helmholtz-Instabilität

    Untersuchung der Kopplungseffekte Innenraum-Kofferraum beim Schiebedachwummern an Hand eines SAE-Modells

    Blumrich, Reinhard / Crouse, Bernd / Freed, David et al. | Tema Archiv | 2007
    Schlagwörter: Helmholtz-Resonator

    Transmission Loss analyses on fuselage panels: approach, numerical results and validation

    Grooteman, F.P. | Tema Archiv | 2006
    Schlagwörter: Helmholtz-Gleichung

    Tonal noises from small cavities on motor vehicles and a case study of a whistling mirror

    Milbank, J. / Watkins, S. / Kelso, R. | Tema Archiv | 2000
    Helmholtz resonance have been determined as the main mechanisms for tonal noise production. These three mechanisms have been briefly reviewed. By ...

    Time-resolved PIV investigations on the laminar-turbulent transition over laminar separation bubbles

    Hain, Rainer / Kähler, Christian J. / Radespiel, Rolf | Tema Archiv | 2009
    the time-resolved Particle Image Velocimetry in the past. The development of vortices which arise from Kelvin-Helmholtz instabilities is ...
    Schlagwörter: Helmholtz-Gleichung

    The low frequency magnetic field susceptibility characteristics of advanced marine cables and a comparison with several equivalent MIL-C-915 cables

    Dixon, D.S. | Tema Archiv | 1985
    length), and effective loop area (ELA) were calculated. Eight samples of various AMC cables were then tested utilizing a Helmholtz coil and a ...

    The effect of underwater noise radiation on ship vibration

    Wilken, Marc / Maess, Matthias / Junge, Michael et al. | Tema Archiv | 2007
    been developed to solve the Helmholtz equation, which allows the computation of the sound pressure field in the water due to a structural ...
    Schlagwörter: Helmholtz-Gleichung

    The development of a large three-axis magnetic field susceptibility test (L-TAMFST) system

    Choo, V. / Javor, E. / Obara, M. et al. | Tema Archiv | 1997
    Naval Undersea Warfare Center (NUWC). L-TAMFST is a multi-axis Helmholtz coil test fixture that is used to perform magnetic field susceptibility ...
    Schlagwörter: Mehrachsen-Helmholtz-Spule

    The design of low frequency underwater acoustic projectors: present status and future trends

    Decarpigny, J.N. / Hamonic, B. / Wilson, O.B. jun. | Tema Archiv | 1991
    Schlagwörter: HELMHOLTZ RESONATOR

    Structural-acoustic mode synthesis for vehicle interior using finite-boundary elements with residual flexibility

    Thomas, B. / Gu, R.J. | Tema Archiv | 2000
    Schlagwörter: Helmholtz-Gleichung

    Sound transmission loss of double-panel partitions with internal microperforated panel absorbers

    Thomas, Christian / Weltin, Uwe / Petersen, Sven | Tema Archiv | 2003
    -mass frequency of the partition. Instead of Helmholtz resonators the use of microperforated panel absorbers (MPAs) is theoretically and ...

    Schlüsseltechnologien Mechatronik. Von der Raumfahrt bis zur Medizin

    Hirzinger, Gerd | Tema Archiv | 2007
    Airbus 340 um 100 kg. Im Rahmen des Konstrukts virtuelle Institute der Helmholtz-Gemeinschaft hat das Institut in jüngster Zeit gemeinsam mit der ...