Affiliation:
1. Department of Civil Engineering, Tsinghua University, Beijing, China
2. Emory college of Arts and Science, Emory University, Atlanta, USA
3. Key Laboratory of Civil Engineering Safety and Durability of the China Education Ministry, Tsinghua University, Beijing, China
Abstract
Undesirable vibration in pipeline structures due to internal gas/liquid coupling, mechanical vibration, and water hammer action may cause machine shutdown, leakage, fatigue failure, and sometimes catastrophic explosion. It is necessary to design a device to mitigate pipeline vibration. This paper proposes a new type of particle damper, the multi-cavity particle damper (MPD). A mechanical MPD model is first proposed. Second, the analytical solutions of the MPD are given for the case of two symmetric impacts per cycle. A corresponding method for numerically simulating more general cases is also proposed, and the optimal movement distance is established using the analytical solution. Third, shaking table tests are carried out on pipeline structures controlled by an MPD subjected to harmonic excitation, and the control effects are verified. Finally, a parametric study is conducted, and the MPD design is discussed. The MPD is found to have a significant damping effect that can reduce the response by 98% in resonant cases. Shaking table tests verify the analytical solution, numerical simulation, and optimization method.
Funder
National Key Research and Development Program of China
Institute of Internet Industry, Tsinghua University
Natural Science Foundation of China
Subject
Mechanical Engineering,Mechanics of Materials,Aerospace Engineering,Automotive Engineering,General Materials Science