Tire Tread Pattern Noise Reduction via Segmentation
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Solution Overview
Problem
Conventional tire noise simulation treats the entire tire as a single noise source, leading to inaccuracies in noise reduction, as multiple contact points on the tire surface act as separate noise sources, resulting in noise levels not meeting expected reductions.
Innovation Solution
A tread pattern generation method that divides the initial tread pattern into partial patterns, modifies their shapes, and adjusts their positions to reduce variation in characteristic values, effectively treating multiple contact points as distinct noise sources and combining them to generate a tread pattern that reduces noise with higher precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the entire tire is treated as a single noise source in simulation, then the simulation process is simple, but the noise reduction precision is insufficient
Solution Approach 1:
The tread pattern is divided into multiple partial patterns corresponding to different contact regions. Each partial pattern is treated as an independent noise source with its own characteristic values (contact area, non-contact area, groove volume). This segmentation allows for precise control of noise from each region while maintaining manageable simulation complexity.
2Measurement precision
If multiple contact points are treated as separate noise sources, then the noise reduction precision is improved, but the calculation complexity increases
Solution Approach 1:
Different characteristic values are assigned to different partial patterns based on their local properties. Each partial pattern has its own contact area, non-contact area, and groove volume measurements. This local quality approach enables precise noise characterization for each contact region without requiring overly complex global calculations.
Solution Approach 2:
The method uses characteristic values (contact area, non-contact area, groove volume) as parameters to represent noise sources. By changing and optimizing these parameters for each partial pattern, the system achieves precise noise control while keeping calculations manageable through parameter-based rather than geometry-based approaches.
3Measurement precision
If the tread pattern is divided into multiple partial patterns and their positions are adjusted, then the noise reduction precision is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The method calculates optimal positions for partial patterns before manufacturing by analyzing characteristic values and noise sources in advance. The tread pattern is designed with predetermined partial pattern arrangements that optimize noise reduction, allowing manufacturing to follow a clear blueprint rather than requiring complex real-time adjustments.
Data Source
AI summary
A processing device divides an initial tread pattern into multiple mutually adjacent partial patterns, each having a width smaller than that of the initial tread pattern, by at least one straight line along a circumferential direction of a tire. The processing device calculates variation amounts of characteristic values of the partial patterns with respect to the circumferential direction, based on a contact region, each of the characteristic values indicating a shape of a corresponding partial pattern. The processing device modifies the shapes of the partial patterns so as to reduce the variation amounts of the characteristic values of the partial patterns. The processing device relatively moves the partial patterns along the circumferential direction so as to reduce a total variation amount of characteristic values of at least two mutually adjacent partial patterns. The processing device combines the partial patterns with each other to generate a tread pattern of the tire.