A Combined Approximation Method with Application to Non-Linear Numerical Creep Groan Analysis

Language: English

Published by Kassel University Press, 2025

3737612358 / 9783737612357

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Seller: BuchWeltWeit Ludwig Meier e.K., Bergisch Gladbach, GermanyBuchWeltWeit Ludwig Meier e.K.

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This item is printed on demand - it takes 3-4 days longer - Neuware -In the automotive industry, the suppression of unwanted noise, such as brakenoise, plays an important role within the manufacturing process of vehicles.These noises decrease the perceived quality and should therefore be detected andeliminated early on in the development process. In addition to measurementson real assemblies, simulation-based prediction of brake noise is also used. Inindustrial applications, the (linear) Complex Eigenvalue Analysis (CEA) of themathematical brake models is commonly used as simulation-based detection. TheCEA detects e.g. creep groan vibrations at an unstable rest position. However,there are operation points where creep groan occurs but the rest position remainsstable and the linear evaluation failed. The aim of this work is therefore toimplement a suitable non-linear approximation method for the prediction of creepgroan vibrations. Two points are crucial here: first, the approximation methodmust be suitable for both creep groan and the respective mathematical models.Secondly, in order to prove the latter, a representative mathematical model ofapplication-orientated FEM models is also required.Within this work, the creep groan phenomenon and macroscopic friction models arefirst discussed. The findings are condensed into an experimentally validated mathematicalmodel with three degrees of freedom that shows low- and high-frequencycreep groan vibrations. By adding two FE-discretised strain rods, mathematicalproperties of application-oriented mathematical models are replicated. Then, nonlinearapproximation methods and the Predictor-Corrector continuationframework are discussed. Core element is the motivation and derivation of thecombined Finite Difference/Harmonic Balance method (FD/HBM). This methodis suitable for approximating periodic oscillations with equations of motion thatexhibit strong non-linearities in only a few degrees of freedom. In the lastpart, the proposed FD/HBM is used to approximate creep groan vibrations inthe strain rod-expanded mathematical model. For systems with many (linear)degrees of freedom, the FD/HBM requires less computing time than establishedapproximation methods while maintaining the same accuracy. Furthermore, acreep groan stability map is systematically derived using linear (CEA) and nonlinear(FD/HBM) analysis. 206 pp. Englisch.

Seller Inventory # 9783737612357

Title
A Combined Approximation Method with Application to Non-Linear Numerical Creep Groan Analysis
Author
Jonas Kappauf
Publisher
Kassel University Press
Publication year
2025
Condition
Neu
Binding
Taschenbuch
Language
English
ISBN 10
3737612358
ISBN 13
9783737612357
Item weight
285 grams
Dimensions
210x148x32 mm

BuchWeltWeit Ludwig Meier e.K.

Bergisch Gladbach, Germany

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BuchWeltWeit Ludwig Meier e.K.

Germany