Tyre/road noise: Influence of multi-asperity road surface properties on tyre-road contact stresses

2013 ◽  
Vol 61 (4) ◽  
pp. 400-406
Author(s):  
Julien Cesbron ◽  
Guillaume Dubois ◽  
Fabienne Anfosso-Ledee ◽  
Hai Ping Yin
Keyword(s):  
Surface Properties ◽  
Contact Stresses ◽  
Road Surface ◽  
Road Noise

scholarly journals PREDICT OF TIRE / ROAD NOISE FROM ROAD SURFACE PROPERTIES

2002 ◽  
Vol 7 ◽  
pp. 2p1-2p9
Author(s):  
Yoshimasa HASHIMOTO ◽  
Hiroyuki NITTA ◽  
Takeshi YOSHIDA
Keyword(s):  
Surface Properties ◽  
Road Surface ◽  
Road Noise

scholarly journals Sight distance analyses for autonomous vehicles in Civil 3D

2021 ◽  
Author(s):  
Khalil Khaska ◽  
Dániel Miletics
Keyword(s):  
Reaction Time ◽  
Human Factors ◽  
Surface Properties ◽  
Autonomous Vehicles ◽  
Road Surface ◽  
Eye Position ◽  
Road Design ◽  
Sight Distance ◽  
Automation Level ◽  
Self Driving Cars

AbstractNowadays, self-driving cars have a wide reputation among people that is constantly increasing, many manufacturers are developing their own autonomous vehicles. These vehicles are equipped with various sensors that are placed at several points in the car. These sensors provide information to control the vehicle (partially or completely, depending on the automation level). Sight distances on roads are defined according to various traffic situations (stopping, overtaking, crossing, etc.). Safety reasons require these sight distances, which are calculated from human factors (e.g., reaction time), vehicle characteristics (e.g., eye position, brakes), road surface properties, and other factors. Autodesk Civil 3D is a widely used tool in the field of road design, the software however was developed based on the characteristics of the human drivers and conventional vehicles.

The effects of road surface and tyre deterioration on tyre/road noise emission

2013 ◽  
Vol 74 (7) ◽  
pp. 921-925 ◽  
Author(s):  
Ka-Yee Ho ◽  
Wing-Tat Hung ◽  
Chung-Fai Ng ◽  
Yat-Ken Lam ◽  
Randolph Leung ◽  
...  
Keyword(s):  
Road Surface ◽  
Road Noise ◽  
Noise Emission

Road-surface properties affecting rates of energy dissipation from vehicles

2009 ◽  
Vol 86 (9) ◽  
pp. 1692-1696 ◽  
Author(s):  
E.A. Igwe ◽  
M.J. Ayotamuno ◽  
R.N. Okparanma ◽  
S.O.T. Ogaji ◽  
S.D. Probert
Keyword(s):  
Energy Dissipation ◽  
Surface Properties ◽  
Road Surface

Influence of Road Surface Characteristics on Tire–Road Noise for Thin-Layer Surfacings

2015 ◽  
Vol 141 (11) ◽  
pp. 04015024 ◽  
Author(s):  
Mingliang Li ◽  
Wim van Keulen ◽  
Halil Ceylan ◽  
Guoqi Tang ◽  
Martin van de Ven ◽  
...  
Keyword(s):  
Thin Layer ◽  
Surface Characteristics ◽  
Road Surface ◽  
Road Noise

scholarly journals Low-Frequency Road Noise of Electric Vehicles Based on Measured Road Surface Morphology

2019 ◽  
Vol 10 (2) ◽  
pp. 33 ◽  
Author(s):  
Zhenqi Yu ◽  
Dong Cheng ◽  
Xingyuan Huang
Keyword(s):  
Surface Morphology ◽  
Simulation Analysis ◽  
Early Stage ◽  
Low Frequency ◽  
Processing System ◽  
Test Site ◽  
Road Surface ◽  
Labor Costs ◽  
Road Noise ◽  
The Road

In this paper, the noise vibration harshness (NVH) road surface morphology of a test site is scanned to establish a data processing system for the road surface, which can be used to transform the road surface morphology into the road surface excitation required for the road noise simulation analysis. The road surface morphology of the test site is used as the excitation input of the simulation analysis. The results obtained from the simulation analysis are equivalent to the experimental results. Using the actual scanning road surface morphology to simulate the excitation of a vehicle, the noise, as well as the vibration response of the vehicle under the actual road excitation of NVH in the early stage of vehicle development, can be accurately predicted. In the physical prototype stage, the rectification of vehicle road noise and the optimization to provide the needed excitation for the simulation analysis can be done, which will reduce the labor costs of the relevant experiment. Therefore, this method of road noise research has important engineering significance.

An Investigation of the Slip of a Tire Tread

1997 ◽  
Vol 25 (2) ◽  
pp. 78-95 ◽  
Author(s):  
J. J. Lazeration
Keyword(s):  
Vehicle Control ◽  
Contact Stresses ◽  
Road Surface ◽  
Experimental Characterization ◽  
Small Magnitude ◽  
Surface Loss ◽  
The Road ◽  
Toe Angle ◽  
The Relationship

Abstract Tire performance such as handling, noise, traction, wear, etc., is determined ultimately in the tire footprint. The nature of the distribution of the contact stresses within the tire footprint determine whether or not the tire tread adheres to the road or slips relative to the road surface. Loss of adhesion between the tire tread and the road can be extreme as in gross slippage resulting in the loss of vehicle control or it can be subtle as in the small magnitude slippage that promotes treadwear. This paper presents results from an experimental characterization of the slip between the tread of a free-rolling tire and a simulated road surface. Trajectories of discrete points on the tread surface were measured from the entrance to the exit of the footprint and were used to calculate the total slip of each point. The relationship between the average slip of the tire and toe angle was established. Also, the relationship between toe, camber, and the distribution of tread slip and velocity across the tire footprint, was investigated in this paper.

Toward Using Tire-Road Contact Stresses in Pavement Design and Analysis

2012 ◽  
Vol 40 (4) ◽  
pp. 246-271 ◽  
Author(s):  
Morris De Beer ◽  
James W. Maina ◽  
Yvette van Rensburg ◽  
Jan M. Greben
Keyword(s):  
Contact Stress ◽  
Contact Stresses ◽  
Road Surface ◽  
Pavement Design ◽  
Tire Model ◽  
Contact Patch ◽  
Circular Shape ◽  
The Road ◽  
Road Pavement ◽  
Vertical Contact

ABSTRACT: Optimization of road pavement design, especially close to the surface of the pavement, requires a more rational approach, which will inevitably include modeling of truck tire-road contact stresses. Various road-surfacing failures have been recorded as evidence that the traditional road pavement engineering tire model idealized by a single uniformly distributed vertical contact stress of circular shape may be inadequate to properly explain and assist in the design against road surface failures. This article therefore discusses the direct measurement of three-dimensional (3D) tire pavement contact stresses using a flatbed sensor system referred to as the “Stress-In-Motion” (SIM) system. The SIM system (or device) consists of multiple conically shaped steel pins, as well as an array of instrumented sensors based on strain gauge technology. The test surface is textured with skid resistance approaching that of a dry asphalt layer. Full-scale truck tires have been tested since the mid-1990s, and results show that 3D tire contact stresses are nonuniform and that the footprint is often not of circular shape. It was found that especially the vertical shape of contact stress distribution changes, mainly as a function of tire loading and associated tire inflation pressures. In overloaded/underinflated cases, vertical contact stresses are the highest toward the edges of the tire contact patch. Higher inflation pressures at lower loads, on the other hand, result in maximum vertical stresses toward the center portion of the tire contact patch. These differences in shape and magnitude need to be incorporated into modern mechanistic-empirical road pavement design tools. Four different idealized tire models were used to represent a single tire type to demonstrate effects of tire modeling on the road pavement response of a typical South African pavement structure incorporating a relatively thin asphalt surfacing. Only applied vertical stress was used for the analyses. It was found that the fatigue life of the road surface layer can be reduced by as much as 94% and strain energy of distortion be increased by a factor of 2.8, depending on the characteristics of the tire model input selected for road pavement design and analysis.

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