TECHNOLOGY & PATENTS:
Vibration Control by Confinement (VCC)
Energy Flow Control (EFC)
USA and International Patents
- 14 years of government and commercial projects
- 13 U.S. and international patents
- Expertise in noise/vibration/acoustics/shock analysis and control
- Capabilities in modeling simulation and analysis
- Capabilities in testing and evaluation
- Capabilites in field data collection and analysis
- Ability to secure government funds for R&D projects ($2.5 billion funding pool)
- Ability to secure sole source phase 3 awards
Publications
Abstract
Title: An innovative noise and vibration suppression technique based on the combination of vibration control by confinement and layered damping approaches
Author: David Tarnowski (QRDC, Inc.), Daryoush Allaei (QRDC, Inc.), Donald Landin, Chi-Ping Chen (3M), and Shaobo Liu (3M)
A feasibility study was conducted to demonstrate that Vibration Control by Confinement (VCC) is a viable approach to today's noise and vibration problems. Two types of structures were examined. First, a finite beam carrying a critical component on one side and subjected to harmonic disturbances on the other side was simulated. In this part of the investigation, the vibration suppression criterion was to minimize vibrations transmitted to the critical component. The VCC approach was compared with current passive methods, such as tuned isolators, vibration absorbers, and two cases of layered damping. As the second example, a plate, resembling the panel section of a car door, was investigated. The plate was subjected to transient and harmonic excitations. The objective was to determine the degree of improvement on the effectiveness of layered damping materials when used in conjunction with VCC. The results of the computer simulation combining VCC with layered damping materials covering 100% and 63% of the plate were of interest in this study. The finite element method was used to model both structures. Results clearly show that VCC can be used as a stand-alone mechanism to suppress or isolate vibrations, or combined with layered damping materials to significantly improve performance.
Abstract
Title: An innovative noise and vibration suppression technique based on the combination of vibration control by confinement and layered damping approaches
Author: David Tarnowski (QRDC, Inc.), Daryoush Allaei (QRDC, Inc.), Donald Landin, Chi-Ping Chen (3M), and Shaobo Liu (3M)
A feasibility study was conducted to demonstrate that Vibration Control by Confinement (VCC) is a viable approach to today's noise and vibration problems. Two types of structures were examined. First, a finite beam carrying a critical component on one side and subjected to harmonic disturbances on the other side was simulated. In this part of the investigation, the vibration suppression criterion was to minimize vibrations transmitted to the critical component. The VCC approach was compared with current passive methods, such as tuned isolators, vibration absorbers, and two cases of layered damping. As the second example, a plate, resembling the panel section of a car door, was investigated. The plate was subjected to transient and harmonic excitations. The objective was to determine the degree of improvement on the effectiveness of layered damping materials when used in conjunction with VCC. The results of the computer simulation combining VCC with layered damping materials covering 100% and 63% of the plate were of interest in this study. The finite element method was used to model both structures. Results clearly show that VCC can be used as a stand-alone mechanism to suppress or isolate vibrations, or combined with layered damping materials to significantly improve performance.
125 Columbia Court, Suite 6, Chaska, MN 55318
phone 952.556.5205 | fax 952.556.5206
email arash@qrdc.com
phone 952.556.5205 | fax 952.556.5206
email arash@qrdc.com