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Automation of the post-processing procedure of numerical modal tyre vibration analyses

Siepman, D.C. (2016) Automation of the post-processing procedure of numerical modal tyre vibration analyses.

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Abstract:Driving comfort and noise emissions of a car have become increasingly important over the last decades. Over these years the main culprit has been recognized to be the tyre-road contact, which is considered one of the most dominant sources of exterior noise of a vehicle. As a consequence tyre manufacturers such as Apollo Vredestein have increased their efforts on improving these comfort and noise characteristics of their tyres. Due to cost effectiveness and the ever increasing capabilities of finite element method (FEM) simulations these simulations are used more and more during the early stages of the tyre development process. This assignment will focus on the so-called modal analysis simulations, which are performed to analyze the dynamic behaviour of a tyre and give more insight in the tyres dynamic behaviour. Ultimately this should allow to make better educated design decisions during the development phase of a new tyre, without having to actually conduct extensive tests on real prototype tyres. The modal analysis simulations are performed using Abaqus FEA, which is a finite element analysis software suite. This assignment will focus mainly on the low frequency range of the tyre vibration spectrum, which is generally considered to be until frequencies of 400 Hz. At the moment of my internship at Apollo Vredestein most of the tasks concerning the modal analysis simulations required many manual user inputs. Since these tasks often involve repetitive steps an overall necessity arouse to improve and automate parts or even the entire simulation procedure. My contribution to improve the simulation procedure is to automate major parts of the post-processing phase of the procedure. Prior to the development of the automation tooling, first several Abaqus simulations had to be run of different tyres to get an overall feeling of modal analysis procedures. Due to incomplete and imperfect material models no real conclusions could be drawn from the obtained results. However in the end the results of the run modal analyses have been used to test and validate the functionality of the developed automation tooling. To realize automation of the post-processing procedure a Python script, a MATLAB graphical user interface application and an user manual have been created. With the newly automated post-processing procedure, firstly the Python-script has to be used to extract the simulation data from the Abaqus simulation results files. Next, this extracted data can be evaluated efficiently within the stand-alone MATLAB application, which is called the Tyre Vibration Toolbox. Finally, the written user manual is specically made to give a concise and practical description on how to perform the automated post-processing procedure. With the tooling users are now able to quickly extract and evaluate data of different simulations in a time-efficient manner with less chance of error. Beside that, extras such as easy export of graphs and the mode shape recognition enhance the post-processing procedure of tyre modal analyses.
Item Type:Internship Report (Master)
Clients:
Apollo Vredestein B.V., the Netherlands
Faculty:ET: Engineering Technology
Subject:52 mechanical engineering
Programme:Mechanical Engineering MSc (60439)
Link to this item:http://purl.utwente.nl/essays/72015
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