Special Issue on Numerical Methods for Vibro–Acoustics and Aeroacoustics; Edited by S. Marburg and M. OchmannOpen Access

More Than Six Elements Per Wavelength: The Practical Use of Structural Finite Element Models and Their Accuracy in Comparison with Experimental Results

P. Langer

Chair of Vibroacoustics of Vehicles and Machines, Department of Mechanical Engineering, Technische Universität München, Boltzmannstraße 15, 85748 Garching, Germany

E-mail Address: P.Langer@tum.de

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M. Maeder

Chair of Vibroacoustics of Vehicles and Machines, Department of Mechanical Engineering, Technische Universität München, Boltzmannstraße 15, 85748 Garching, Germany

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C. Guist

BMW Group, 80788 Munich, Germany

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M. Krause

ISKO engineers AG, 80807 Munich, Germany

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, and

S. Marburg

Chair of Vibroacoustics of Vehicles and Machines, Department of Mechanical Engineering, Technische Universität München, Boltzmannstraße 15, 85748 Garching, Germany

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https://doi.org/10.1142/S0218396X17500254Cited by:63 (Source: Crossref)

Abstract

Choosing the right number and type of elements in modern commercial finite element tools is a challenging task. It requires a broad knowledge about the theory behind or much experience by the user. Benchmark tests are a common method to prove the element performance against analytical solutions. However, these tests often analyze the performance only for single elements. When investigating the complete mesh of an arbitrary structure, the comparison of the element’s performance is quite challenging due to the lack of closed or fully converged solutions. The purpose of this paper is to show a high-precision comparison of eigenfrequencies of a real structure between experimental and numerical results in the context of an element performance check with respect to a converged solution. Additionally, the authors identify the practically relevant accuracy of simulation and experiment. Finally, the influence of accuracy with respect to the number of elements per standing structural bending wave is shown.

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Vol. 25, No. 04

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History

Received 13 May 2016

Revised 21 February 2017

Published: 29 March 2017

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This is an Open Access article published by World Scientific Publishing Company. It is distributed under the terms of the Creative Commons Attribution 4.0 (CC-BY) License. Further distribution of this work is permitted, provided the original work is properly cited.

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More Than Six Elements Per Wavelength: The Practical Use of Structural Finite Element Models and Their Accuracy in Comparison with Experimental Results

Abstract

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