Squeak and Rattle Director

Create evaluation lines, evaluate them, and optimize the interfaces to eliminate squeak and rattle issues.

AltairSqueak and Rattle Director (SnRD) allows part-time analysts and advanced S&R CAE engineers to rapidly identify and eliminate Squeak and Rattle risks in products at an early design stage. This is achieved by utilizing a novel set of tools and methods included in a stream-lined, semi-automated process which is fully integrated in HyperWorks.

SnRD simplifies otherwise complex and time-consuming tasks, making it easy to analyze risks, identify root-causes, find a solution through numerical optimization and explore effects caused by climate and manufacturing variability. Together with the extensive S&R expertise offered by Altair Product Design Team, Altair Squeak and Rattle Director is the market leading solution for Perceived Quality.

Rattle is caused when there is a relative motion between components that come in contact for a short duration of time, due to impact forces. Rattling generally occurs when the components are loose or have overly flexible elements. Squeak is an undesirable sound that occurs when two surfaces interact under stick-slip phenomenon. Friction induces is caused by a relative motion between the surfaces. The frictional energy is stored in the contact surfaces and is released when it exceeds the kinetic friction; which in turn produces an audible squeak.

The phenomena of squeak and rattle may occur even in a newly manufactured product, and will increase in time, causing deterioration of product quality and discomfort.

Both testing and simulation techniques could be used in various industries, aimed to eliminate the occurrence of squeak and rattle. Consider the example of the automotive industry, where the problem of squeak and rattle is solved to reduce the noise, vibrations, harshness, and tp control cabin noise. This enhances both the ride quality and comfort.

To develop innovative, reliable, and efficient products, you need to be aware of how their design will perform under real world conditions, and have the ability to obtain these insights as quickly as possible. Manufacturers no longer have the luxury of performing lengthy physical tests to understand how a design will behave.