The Fairing Arrangement for Vortex Induced Vibration Suppression Effect in Soliton Current

2020 ◽  
Vol 103 (sp1) ◽  
pp. 293
Author(s):  
Xiaoliang Qi ◽  
Dagang Zhang ◽  
Haiyan Guo ◽  
Youxiao Chen
Keyword(s):  
Vibration Suppression ◽  
Vortex Induced Vibration ◽  
Suppression Effect

scholarly journals Numerical Investigation on Vortex-Induced Vibration Suppression of a Circular Cylinder with Axial-Slats

2019 ◽  
Vol 7 (12) ◽  
pp. 454 ◽  
Author(s):  
Wei Wang ◽  
Zhaoyong Mao ◽  
Wenlong Tian ◽  
Tingying Zhang
Keyword(s):  
Circular Cylinder ◽  
Frequency Ratio ◽  
Vibration Suppression ◽  
Amplitude Ratio ◽  
Number Range ◽  
Vortex Induced Vibration ◽  
Suppression Effect ◽  
Coverage Ratio ◽  
Region I ◽  
Region Ii

The vortex-induced vibration (VIV) suppression of a circular cylinder with the axial-slats is numerically investigated using the computational fluid dynamics (CFD) method for Reynolds number range of 8.0 × 103–5.6 × 104. The two-dimensional unsteady Reynolds averaged Navier–Stokes (RANS) equations and Shear-Stress-Transport (SST) turbulence model are used to calculate the flow around the cylinder in ANSYS Fluent. The Newmark-β method is used to evaluate structural dynamics. The amplitude response, frequency response and vortex pattern are discussed. The suppression effect of the axial-slats is the best when the gap ratio is 0.10 and the coverage ratio is 30%. Based on the VIV response, the whole VIV response region is divided into four regions (Region I, Region II, Region III and Region IV). The frequency ratio of isolated cylinder jumps between region II and region III. However, the frequency ratio jumps between region I and region II for a cylinder with the axial-slats. The axial-slats destroy the original vortex and make the vortex easier to separate. The online amplitude ratio is almost completely suppressed, and the cross-flow amplitude ratio is significantly suppressed.

The Influence of Variable-Speed Waveforms on Vibration Suppression in Time-Varying Speed Cutting

2013 ◽  
Vol 690-693 ◽  
pp. 2514-2518
Author(s):  
Juan Cong ◽  
Yun Wang ◽  
Wei Na Yu
Keyword(s):  
Wave Speed ◽  
Vibration Suppression ◽  
Sine Wave ◽  
Time Varying ◽  
Variable Speed ◽  
Suppression Effect ◽  
Speed Variation ◽  
Input And Output ◽  
System Input ◽  
Better Than

Through the research on the change of system input and output energy in time-varying speed cutting, the influence of variable-speed waveforms on vibration suppression effect in time-varying speed cutting is quantitatively analyzed in this paper. A conclusion can be drawn that sine wave speed variation is better than triangle wave speed variation in vibration suppression.

Vibration suppression effect in a maglev system for flexible steel plate with curvature

2019 ◽  
Vol 59 (3) ◽  
pp. 993-1001
Author(s):  
Makoto Tada ◽  
Hikaru Yonezawa ◽  
Hiroki Marumori ◽  
Takayoshi Narita ◽  
Hideaki Kato ◽  
...  
Keyword(s):  
Steel Plate ◽  
Vibration Suppression ◽  
Suppression Effect ◽  
Maglev System

scholarly journals Fuzzy iterative PID-type control of vortex induced vibration suppression

2017 ◽  
Vol 19 (7) ◽  
pp. 5137-5148
Author(s):  
N. M. R. Shaharuddin ◽  
I. Z. Mat Darus ◽  
P. Mohd Samin ◽  
M. A. Wahid
Keyword(s):  
Vibration Suppression ◽  
Vortex Induced Vibration

scholarly journals Numerical and Experimental Study on Suppression Effect of Acoustic Black Hole on Vibration Transmission of Refrigerator Compressor

2021 ◽  
Vol 11 (18) ◽  
pp. 8622
Author(s):  
Xiaofei Du ◽  
Qidi Fu ◽  
Jianrun Zhang ◽  
Chaoyong Zong
Keyword(s):  
Numerical Simulation ◽  
Black Hole ◽  
Vibration Suppression ◽  
Structural Vibration ◽  
Flexural Wave ◽  
Response Analysis ◽  
Flexural Waves ◽  
Suppression Effect ◽  
Support Plate ◽  
The Time Domain

The acoustic black hole (ABH) structures have the potential to achieve structural vibration suppression and noise reduction through the effect of the ABH on the concentration and manipulation of flexural waves. In this paper, a new solution is proposed to embed 2-D ABHs on the support plate to suppress the transmission of compressor vibration to the refrigerator body. The vibration and acoustic measurement experiment of the compressor, the support plate and the refrigerator body, and the coherence analysis of the vibration signals and acoustic signal are carried out to determine the influence of the compressor vibration on the vibration of the refrigerator body and the radiation sound of the back wall. The concentration and manipulation effects of 2-D ABH on flexural waves are verified by numerical simulation of flexural wave propagation in the time domain. FEM models of the original support plate and the damping ABH support plate are established to investigate the comprehensive effect of the 2-D ABHs and the damping layers on the vibration characteristics of the support plate through vibration modal and dynamic response analysis. Numerical simulation results show that the 2-D damping ABHs can suppress the vibrations generated by the compressor at specific frequencies in the middle and high-frequency bands from being transmitted to the refrigerator body through the support plate.

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