Stuart Bolton wants to quiet things down on our highways and roads. He and colleagues at Purdue University are trying to help tire manufacturers design tires that don't make so much noise. Bolton says that the way tires are made now, especially the shape of the treads, is what makes some tires more prone to noise generation than others. When they interact or smack onto the pavement, the blocky shapes act like hammers, he explains. Underlying reinforcement belts in the tire vibrate and radiate energy outward, producing sound resembling the cones in stereo speakers. Bolton is one of several Purdue University researchers who developed a mathematical model that helps designers identify the portions of the tire that produce the noise. "We've introduced a way of experimentally looking at tire vibration in a way that identifies components that generate the most noise," says Bolton. He measures various vibration waves that travel along the tire's tread band—the outer segment of the tire that includes the reinforcing belts. Specific vibrations are assigned wave numbers. These modes are used for creating graphs that illustrate which vibration is coming from specific portions of the tire. The graphs also indicate which vibrations are likely to produce the most noise. Purdue's Institute for Safe, Quiet, and Durable Highways is working with the U.S. Department of Transportation, Michelin Tire, Continental General Tire Inc., Goodyear Tire and Rubber Co., and Hancock Tire Co. Ltd.
Really impressive how they mathematically modeled such a complex and dynamic system acoustically. Would be interesting to see how much noise reduction could be achieved using this new analysis technique.
The article gave emphasis on the importance and benefit of using quiet suv tires. Working with tire companies like Goodyear, Hancock and Rubber Co. is a great help to deal with the problem to introduce different ways to lessen the noise.
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A quick look into the merger of two powerhouse 3D printing OEMs and the new leader in rapid prototyping solutions, Stratasys. The industrial revolution is now led by 3D printing and engineers are given the opportunity to fully maximize their design capabilities, reduce their time-to-market and functionally test prototypes cheaper, faster and easier. Bruce Bradshaw, Director of Marketing in North America, will explore the large product offering and variety of materials that will help CAD designers articulate their product design with actual, physical prototypes. This broadcast will dive deep into technical information including application specific stories from real world customers and their experiences with 3D printing. 3D Printing is