Tread pattern groove pumping noise source recognition method

Abstract

The invention discloses a tread pattern groove pumping noise source recognition method which comprises the following steps: (1) establishing a tire-road surface finite element model with mixed patterns, calculating tire static load and carrying out mechanical analysis; (2) carrying out kinetic analysis under the stable state and the transient rolling state of a tire; (3) establishing a pattern groove noise numerical model at the ground connection area; (4) analyzing the flow field characteristics in the patter groove; (5) establishing the relation between the flow field and the sound field by adopting a vortex sound theory, and solving Lamb vector to obtain the distribution position of a pattern groove pumping noise source. The tread pattern groove structure is improved at the position where the noise is produced, and tread pattern groove pumping noise source recognition is carried out again until the design requirements of the noise are reached. The distribution position of the pattern groove noise source is recognized on the basis of the vortex sound theory in the rolling process of the tire, so that the aim of reducing the tread pattern groove noise can be achieved by controlling the sound source, and a guidance is provided for the design of the low-noise tread pattern.

Description

technical field [0001] The invention relates to a design method of a vehicle tire, in particular to a method for identifying and improving a tire pattern groove noise sound source. Background technique [0002] Tire noise is one of the four major noise sources of automobiles, accounting for as much as 40%, and it continues to increase with the increase of driving speed. Studies have shown that when the speed of passenger cars exceeds 50km / h, and the speed of trucks exceeds 70km / h, tire noise will stand out and quickly occupy the main position of vehicle noise sources. In order to limit the size of tire noise, EC1222 / 2009 "Tire Labeling on Fuel Efficiency and Other Parameters" promulgated by the European Union in 2009 proposed specific limits and implementation dates for tire noise, rolling resistance, and wet road grip performance, and It was officially implemented on July 1, 2012. Japan, South Korea, the United States and other countries have also formulated and implement...

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Problems solved by technology

[0005] Jiangsu University's master thesis "Research on Pumping Noise of Tire Transverse Pattern Groove Based on FSI Method" and "Research on Calculation Method of Tire Pumping Noise and Its Noise Reduction" also used numerical calculation methods to study the influence of tread structure on tire noise, but The research objects of both are simplified transverse grooves, which are inconsistent with the fact that tires have mixed patterns; moreover, these two studies only qualitatively judge the nature of the noise, and cannot clearly indicate the location of the noise

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