Vibration Damping and Modal Analysis
UDRI has been researching all aspects of vibration control technology for the past 35 years. The Structures and Mechanical Systems group has forged a unique technical capability that combines the mechanical, acoustic, controls, and material engineering disciplines to solve a wide variety of vibration problems. Our vibration control strengths lie in the four key areas described below:
- Modal Analysis/Operational Deflection Shapes: We have field-portable systems to determine the dynamic characteristics of structures and acoustic environments under real operating conditions.
- Passive Damping System Design and Validation: We have a proven process that combines experimental modal analysis and finite element analysis to optimize damping system performance to reduce vibratory stress levels.
- Damping Materials Characterization: We have a unique capability to develop and characterize new damping materials across a broad range of frequencies and temperatures.
- Dynamic Testing: We have a wide variety of dynamic testing equipment: from servo-hydraulic systems to a 5000 lbf-3000 Hz shaker with appropriate accelerometer and strain gage instrumentation, to assess structural integrity under combined cyclic thermal and mechanical loading.
As a nationally recognized leader in the application of passive damping technology, UDRI has solved many vibration-induced problems. We identify the source of the vibration problem, define the environmental constraints, design the damping systems, develop new damping materials, manufacture and test prototypes, and develop production line procedures. For example, for the TF-30 engine, we developed, demonstrated, and transitioned a damping system for the inlet guide vanes that is currently applied during standard overhaul and has saved the Air Force over $185 million.
