Linear and Nonlinear Inerters for Enhanced Vibration Isolation
Abstract
Approved for Public ReleaseA major priority of the US Navy is to reduce noise and vibration transmitted from machinery. This is particularly important for applications where this noise and vibration can significantly impact system operations and where noise and vibration mitigation requirements continue to increase. While reducing vibrations through improved design and balancing of machinery is important, a common approach that is potentially more effective and robust is the use of isolation mounts. Vibration isolation mounts limit the transmission of vibration from a vibration source to a point of attachment through the use of a low stiffness connection. The effectiveness of isolation systems typically increases with decreases in the stiffness of the isolation system; however, excessively low stiffness in an isolator significantly increases the static and low frequency response of the isolated mass and would result in dangerously large isolator stroke demands. This project will evaluate strategies that use linear and nonlinear inerters toimprove the effectiveness of isolation systems, while not compromising, and in some cases improving, their displacement response. The inerters studied in this project convert the translational motion of the system isolation layer to the rotational motion of a flywheel. Through this process, the inerters provide significant mass effects to the isolation layer without meaningfully increasing its physical mass. Thus, inerters represent a lightweight and compact means of impacting the dynamics of the isolated systems studied.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Nov 08, 2024
- Source ID
- N000142412482
Entities
People
- Nicholas E. Wierschem
Organizations
- Office of Naval Research
- United States Navy
- University of Tennessee