An overview of recent developments of tuned vibration absorbers (TVAs) for vibration suppression is presented. The paper summarizes some popular theory for analysis and optimal tuning of these devices, discusses various design configurations, and reviews the recent application of TVAs to control wind-induced oscillations of pipelines above the Arctic Circle. Although the wind-induced pipeline vibrations are relatively small, the accumulation of vibration cycles can cause fatigue at pipeline joints. The TVAs used in this application have reduced the RMS displacements of the pipeline by as much as a factor of seven. Additionally, the paper introduces a new overhead TVA installation on the pipeline for accommodating environmental considerations.
Pipeline Vibration Dampers (PVDs) have been utilized to mitigate wind induced vibrations for above-ground pipelines in the Arctic Circle for decades. Although such pipeline vibrations are relatively small, the accumulation of vibration cycles can cause excessive fatigue at pipeline joints. This paper considers the application of PVDs to help suppress vortex induced vibrations (VIV) of subsea pipelines, and presents an analytical method for estimating PVD weight, damping, and tuning frequency to provide optimal vibration reduction. The paper also reviews some of the fundamental VIV concepts and provides an overview of the PVD behavior and equations of motion. Akin to the above ground implementation, each PVD may have to be self-contained in a small pressure vessel for the subsea application in order to avoid hydrodynamic interactions with the surrounding sea water and ensure the PVD mechanical performance. The PVD devices may be used exclusively for VIV mitigation, or they may be used in combination with helical strakes to help suppress VIV.
Truck exhaust components must withstand vibration inputs from the diesel engine as well as from road inputs. Cumulative damage from the significant mileage these vehicles are exposed to can be severe; however, customers have an expectation that the components will last the life of the vehicle. Tuned vibration absorbers (TVAs) are an effective way to mitigate vibrations resulting from excitation of resonances due to random vibration exposure. A pipe section was tested to verify its expected mode shapes to aid in proper TVA placement. Subsequent tests were performed not only with TVAs but also with an equivalent mass in order to determine the true improvement due to the TVA effect. This paper covers a case study demonstrating the use of a TVA to achieve a 60% reduction in vibration.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.