Study On A System Of Tilted-pitch Tread Pattern Noise Emulation And Optimization

The tread pattern noise cased by the interaction of tire and road makes the chief part of the vehicle noise when car runs at a speed of above 70km/h. As the society pays more and more attention to the traffic noise problem, the requirement to its control is raised gradually. It is of great significance and far-reaching impact to study the mechanism of tire tread pattern noise and to design and develop the low-noise tire tread.The tilted-pitch tire tread with high aesthetic and mechanical properties is an emerging design style and could offer a broad design space. It is welcomed by the specialists and users for subdued noise and has gradually become the focus research in the rubber and tire industry.This article systematically studies the tread pattern noise mechanism and establishes a physical modal which is suitable for the simulation on the computer. Based on the previous research and the characteristic of the tilted-pitch tread pattern, it offers the corresponding image processing and modeling method, establishes the subjective evaluation and objective evaluations. The subjective evaluations is composed with noise annoyance degree,acuity degree,loudness and welter degree. The objective evaluations have three styles which are comprehensive evaluation,the allow- noise standard curve of American(M curve)and the feel noise level evaluation. While the most important and innovative parts are the tilted-pitch tread pattern image processing and modeling method and the structure parameters optimization.With the help of the previous research ,I have developed the tilted-pitch tread pattern low-noise analysis and optimization system on the platform of a powerful software developing tool Visual C++6.0. Chapter 5 introduces the structure of the software system, while the important and detail parts are the image processing, structure parameters input, noise simulation analysis, diagnostic evaluation, structure parameters optimization , the development of the hardware encryption based on USB dog and so on.The study is very practical and closely integrated with projects. It provides an powerful and efficient method for the design and production of the low-noise tire tread pattern. The software is being used by the relevant departments more and more and has achieved great social and economical benefits...