Search Results - "Roppert, Klaus"

An Affordable Acoustic Measurement Campaign for Early Prototyping Applied to Electric Ducted Fan Units by Schoder, Stefan, Schmidt, Jakob, Fürlinger, Andreas, Klaus, Roppert, Paul, Maurerlehner

“…New innovative green concepts in electrified vertical take-off and landing vehicles are currently emerging as a revolution in urban mobility going into the…”
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Simulationen von Strömungsakustik in rotierenden Bauteilen zur Entwicklung von Antriebskonzepten der Autos der Zukunft by Freidhager, Clemens, Maurerlehner, Paul, Roppert, Klaus, Wurzinger, Andreas, Hauser, Alexander, Heinisch, Martin, Schoder, Stefan, Kaltenbacher, Manfred

“…Zusammenfassung Die Antriebstechniken der Zukunft, wie z. B. der Elektromotor oder die Brennstoffzelle, erzeugen selbst nur sehr wenig Lärm, wodurch die…”
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Revisiting the dry friction-like magnetic vector hysteresis model by Sauseng, Alexander, Kaltenbacher, Manfred, Roppert, Klaus

“…Physically correct simulations of magnetic devices require precise and energy-consistent hysteresis models. Electrical steel sheets of, e.g., power…”
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Model reduction of linear differential-algebraic equation systems using constructed spectral projectors by Kvasnicka, Samuel, Roppert, Klaus, Kaltenbacher, Manfred

“…This contribution introduces linear differential-algebraic equation (DAE) systems and provides the explicit construction steps of spectral projectors for DAEs…”
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Material Data Identification in an Induction Hardening Test Rig with Physics-Informed Neural Networks by Asadzadeh, Mohammad Zhian, Roppert, Klaus, Raninger, Peter

“…Physics-Informed neural networks (PINNs) have demonstrated remarkable performance in solving partial differential equations (PDEs) by incorporating the…”
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Incorporation of a 3-D Energy-Based Vector Hysteresis Model Into the Finite Element Method Using a Reduced Scalar Potential Formulation by Domenig, Lukas Daniel, Roppert, Klaus, Kaltenbacher, Manfred

“…In this work, the reduced scalar potential is utilized to derive a finite element formulation capable of handling hysteretic nonlinear material laws. The…”
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Aeroacoustic source term computation based on radial basis functions by Schoder, Stefan, Roppert, Klaus, Weitz, Michael, Junger, Clemens, Kaltenbacher, Manfred

“…SUMMARY In low Mach number aeroacoustics, the known disparity of length scales makes it possible to apply well‐suited simulation models using different meshes…”
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Comparison of a quasi Newton method using Broyden’s update formula and an adjoint method for determining local magnetic material properties of electrical steel sheets by Gschwentner, Andreas, Kaltenbacher, Manfred, Kaltenbacher, Barbara, Roppert, Klaus

“…Purpose Performing accurate numerical simulations of electrical drives, the precise knowledge of the local magnetic material properties is of utmost…”
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Error detection and filtering of incompressible flow simulations for aeroacoustic predictions of human voice by Schoder, Stefan, Kraxberger, Florian, Falk, Sebastian, Wurzinger, Andreas, Roppert, Klaus, Kniesburges, Stefan, Döllinger, Michael, Kaltenbacher, Manfred

“…The presented filtering technique is proposed to detect errors and correct outliers inside the acoustic sources, respectively, the first time derivative of the…”
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Simulating induction heating processes using harmonic balance FEM by Roppert, Klaus, Toth, Florian, Kaltenbacher, Manfred

“…Purpose The purpose of this paper is to examine a solution strategy for coupled nonlinear magnetic-thermal problems and apply it to the heating process of a…”
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Predicting Spatial Distributions of Lighthill’s Aeroacoustic Source Terms Using Steady-State RANS Simulations in Turbocharger Compressors by Freidhager, Clemens, Maurerlehner, Paul, Roppert, Klaus, Heinisch, Martin, Renz, Andreas, Schoder, Stefan, Kaltenbacher, Manfred

“…AbstractLighthill’s aeroacoustic analogy connects acoustic source terms with vortical and turbulent structures. For resolving vortical and turbulent structures…”
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Comparing two topology transformer hysteresis models derived from DC hysteresis measurements by Albert, Dennis, Domenig, Lukas Daniel, Schachinger, Philipp, Roppert, Klaus, Renner, Herwig

“…Purpose The purpose of this paper is to investigate the applicability of a direct current (DC) hysteresis measurement on power transformer terminals for the…”
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3D modeling of inductive and capacitive coupling between surface‐mounted multilayer‐capacitors by Riener, Christian, Bauernfeind, Thomas, Baumgartner, Paul, Hackl, Herbert, Ibel, Martin, Kvasnicka, Samuel, Prestros, Ralph, Roppert, Klaus, Kaltenbacher, Manfred

“…Electronic based systems (EBS) tend to become smaller in size while at the same time their functionality, complexity, and operating frequencies increase…”
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Coupling Nonlinear Magneto‐Thermal Problems in Frequency Domain with the Mechanical Field by Roppert, Klaus, Toth, Florian, Kaltenbacher, Manfred

“…This paper investigates a computationally efficient strategy for simulating induction heating processes, using a multiharmonic ansatz and harmonic balancing…”
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Broadband 3D Modeling and Simulation of DC-Biased SMT Ferrite Beads for EMI Filters by Riener, Christian, Bauernfeind, Thomas, Roppert, Klaus, Kvasnicka, Samuel, Auinger, Bernhard, Kaltenbacher, Manfred

“…Electromagnetic interference (EMI) within electronic based systems (EBS) became a fundamental issue that requires dedicated countermeasures e.g. filter…”
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openCFS-Data: Data Pre-Post-Processing Tool for openCFS by Schoder, Stefan, Roppert, Klaus

“…Many numerical simulation tools have been developed and are on the market, but there is still a strong need for appropriate tools capable to simulate…”
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openCFS: Open Source Finite Element Software for Coupled Field Simulation -- Part Acoustics by Schoder, Stefan, Roppert, Klaus

“…Although many numerical simulation tools have been developed and are on the market, there is still a strong need for appropriate tools capable to simulate…”
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Stability and convergence of the penalty formulation for nonlinear magnetostatics by Egger, Herbert, Engertsberger, Felix, Roppert, Klaus

“…The magnetostatic field distribution in a nonlinear medium amounts to the unique minimizer of the magnetic coenergy over all fields that can be generated by…”
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On energy consistent vector hysteresis operators by Egger, Herbert, Engertsberger, Felix, Domenig, Lukas, Roppert, Klaus, Kaltenbacher, Manfred

“…Incremental models for magnetic vector hysteresis have been developed in previous works in accordance with basic principles of thermodynamics. In this paper,…”
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On nonlinear magnetic field solvers using local Quasi-Newton updates by Egger, Herbert, Engertsberger, Felix, Domenig, Lukas, Roppert, Klaus, Kaltenbacher, Manfred

“…Fixed-point or Newton-methods are typically employed for the numerical solution of nonlinear systems arising from discretization of nonlinear magnetic field…”
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