Avancerad sökning

Hittade 4 uppsatser som matchar ovanstående sökkriterier.

  1. 1. Estimation of Blocked Forces in an Assembly with Rear Drive Unit as a Source

    Master-uppsats, KTH/Maskinkonstruktion (Inst.)

    Författare :Srujeeth Khanna Bala; [2021]
    Nyckelord :Component based TPA; source characterized forces; FEM; Contact forces; ISO20270:2019; Blocked forces; Automotive; NVH; sound and vibration; komponentbaserad TPA; karaktärisering av bullerkällor; FEM; kontaktkrafter; blockerade krafter; bilindustri; ljud och vibrationer; ISO20270:2019;

    Sammanfattning : Experimental validations are widely used for studying dynamic structural behaviors and these studies involve defining the structures completely as being used in real time. While in numerical simulations such detailed features are not specified to ease the computation, thereby deviating from accurate results. LÄS MER

  3. 2. Transfer Path Analysis of Wind Noise on a Passenger Car

    Master-uppsats, KTH/Farkost och flyg

    Författare :Ren Huawei; [2019]
    Nyckelord :Transfer Path Analysis TPA ; Wind Noise; Principle Com-ponent Analysis PCA ; Matrix Inversion Method; Transfer Path Analysis TPA ; Wind Noise; Principle Com-ponent Analysis PCA ; Matrix Inversion Method;

    Sammanfattning : Over the last years, due to the development of quieter engines and drivetrains, the importance of addressing the vehicle wind noise problem has significantly increased.In this thesis work, several existing Transfer Path Analysis methods have been applied on an experimental database acquired during a wind tunnel test on a passenger car with the objective of analyzing the distribution of the wind noise sources and their contribution to the target microphones located inside the vehicle. LÄS MER

  4. 3. Investigation on Road Noise Transmission through Steering System

    Master-uppsats, KTH/MWL Marcus Wallenberg Laboratoriet

    Författare :Yuan Xie; [2017]
    Nyckelord :Blocked force method; vehicle NVH test; coupled system;

    Sammanfattning : An investigation on noise transmission through the steering gear system is focused on the area of vehicle NVH (Noise Vibration and Harshness). From previous investigations it is well known that noise transmission through the steering system sometimes has a significant influence referring to tire road noise. LÄS MER

  5. 4. Methodology for Multidisciplinary Optimization of Vehicle Suspension Systems

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Hållfasthetslära

    Författare :Martin Wollstad; Alexander Sallbring; [2015]
    Nyckelord :Technology and Engineering;

    Sammanfattning : A manual iterative process is often used in the design process of vehicle suspension systems. This thesis aim to develop a methodology for multidisciplinary optimization of vehicle suspension systems, which can be used to introduce an optimization driven process into the design process of vehicle suspension systems. LÄS MER