Technical Concepts

Technology and problem evaluation approaches used in SnRD.

Capturing Squeak and Rattle Issues

Squeak and Rattle issues are always caused by relative displacement between two components which are mounted with or without any gap, and might interact for a short duration of time. This means, if there is no relative displacement, then there are no squeak and rattle issues.

In order to capture these issues in a pre-production stage, there are several methods to measure, analyse and fix these issues. Some of the widely used methods are mentioned here -
  • Acoustics method- Issues are captured using acoustical methods, and these captured sound quality will define the squeak and rattle issues.
  • Laser Scanning Vibrometer- is an instrument for rapid non-contact measurement and imaging of vibration.

SnRD Methodology

The power of Virtual Simulation enables the user to successfully, design and engineer innovative products for today’s competitive environment. The ability to analyze the multifaceted physical performance characteristics of a design, before any prototype is made can substantially increase productivity. Companies need robust simulation tools to efficiently overcome time, budget and quality constraints.

The development of the Squeak and Rattle Director is based on the above principle. This tool will help the CAE analysts in identifying the locations of squeak and rattle noises based on multiple risk analysis capabilities. Moreover, SnRD enables root cause analysis and diagnosis of the issues detected, enabling communication to other stakeholders, such as designers and manufacturing. The problem solving is the key in development cycle, therefore SnRD has been enhanced with Optimization setup as well, to guide the user in proposing efficient design changes.