Tire Outer Contour Design for Aerodynamic Drag Reduction
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Solution Overview
Problem
Current methods for reducing tire aerodynamic drag are inefficient due to limited parameter selection and lack of systematic optimization, leading to high uncertainty and low improvement efficiency in tire outer contour design.
Innovation Solution
A design method for the tire outer contour structure that involves dividing parameters into five key components, conducting numerical simulations, using computational fluid dynamics, and applying intelligent optimization techniques such as simulated annealing to minimize aerodynamic drag coefficients, thereby optimizing the tire's aerodynamic performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional testing schemes are used to optimize tire outer contour structure, then parameter selection is limited to the testing scheme, but this leads to uncertainty and blindness in the design process with low improvement efficiency
Solution Approach 1:
The patent replaces traditional mechanical testing schemes with computational fluid dynamics (CFD) numerical simulation technology. This substitution enables continuous parameter optimization without being constrained by discrete testing points, eliminating the blindness and uncertainty of traditional methods while significantly improving design efficiency through computer-based aerodynamic drag coefficient calculation.
2Loss of energy
If the aerodynamic shape is optimized to reduce drag, then aerodynamic drag is reduced, but this affects the beauty and design of the car
Solution Approach 1:
The patent applies parameter changes by systematically optimizing five specific outer contour parameters (upper sidewall height, running surface width, shoulder transition radius, and two tread arc radiuses) within defined ranges. This allows the tire shape to be adjusted for aerodynamic performance while maintaining design flexibility and aesthetic considerations through controlled parameter variation rather than radical shape changes.
3Loss of energy
If comprehensive optimization of multiple parameters is performed, then aerodynamic drag is reduced, but the design cycle increases
Solution Approach 1:
The patent implements preliminary action by pre-defining the five key outer contour parameters and their optimization ranges before the optimization process begins. This preliminary preparation, combined with CFD numerical simulation, allows comprehensive multi-parameter optimization to be performed efficiently in a virtual environment, significantly reducing the actual design cycle time compared to traditional iterative testing approaches.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method effectively reduces tire aerodynamic drag, shortens the design cycle, and improves vehicle economy by providing a systematic and efficient approach to tire contour optimization, resulting in a 19.92% decrease in aerodynamic drag coefficient.
Implementation Method 1
building an aerodynamic drag calculation model for the initial tire three-dimensional model using the initial values of the five outer contour parameters, and performing a numerical simulation analysis to obtain an aerodynamic drag coefficient value of the initial tire three-dimensional model
Data Source
AI summary
A design method for an outer contour structure of a tire capable of reducing tire wind resistance, including the following steps: step 1, establishing an initial tire model; step 2, building an tire aerodynamic drag calculation model; step 3, designing a testing scheme using tire five contour parameters; step 4, building a function relationship between tire five outer contour parameters and an aerodynamic drag coefficient values, and verifying the accuracy of the function relationship; and step 5, obtaining tire five outer contour parameters when the aerodynamic drag coefficient value is smallest by using an optimization algorithm. The design method effectively avoids the blindness problem in the design process of the tire outer contour structure and can effectively reduce the design cycle number of the tire outer contour structure, thereby improving the improvement efficiency, meanwhile, it is benefit to reduce tire aerodynamic drag and improve vehicle economy and reduce harmful emissions.