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Modeling and Simulation in Time Domain for Random Road Excitation Based on Inverse Fourier Transform

Author: JiangLiLi
Tutor: LiJie
School: Jilin University
Course: Vehicle Engineering
Keywords: Car ride Time-domain simulation The road surface model Fourier transform
CLC: U461.4
Type: Master's thesis
Year: 2007
Downloads: 553
Quote: 13
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Abstract


Pavement as the car entered the main vibration source , a direct impact on the car ride ( ride comfort ) , fuel economy , driving safety and handling stability . This article is for the car ride simulation carried out on the road time-domain modeling content . Were established based on the inverse Fourier transform , a single round of road random excitation and four road random excitation time domain model , detailed modeling of the main points and the process to facilitate the realization of the corresponding algorithm . Random excitation time domain model based on the construction of a single round of pavement , combine 1 /4 car typical two-degree-of-freedom system vibration model , time domain and frequency domain simulation to determine the car 's ride evaluation , by comparing the simulation results , the analysis prove the correctness and feasibility of the time-domain model built . Establish seven degrees of freedom of the automobile space system vibration model based on combining the time-domain model was built in line with the the actual road four-wheel car road random excitation , vehicle ride in the time domain simulation . Practice through a large number of simulation results illustrate the simulation speed , high precision analog method is simple and based on the inverse Fourier transform simulated road random excitation . Moreover, the model based on the Fourier transform established pavement , the pavement with the specified spectral characteristic frequency domain model to reproduce in the time domain , to build computer road simulation software as well as the basis of vehicle ride dynamics simulation .

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CLC: > Transportation > Road transport > Automotive Engineering > Car theory > Car ride and comfort
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