Influence of the gap size on the response of a single-degree-of-freedom vibro-impact system with two-sided constraints: Experimental tests and numerical modeling

2021 ◽  
Vol 206 ◽  
pp. 106617
Author(s):  
Giulia Stefani ◽  
Maurizio De Angelis ◽  
Ugo Andreaus
Keyword(s):  
Numerical Modeling ◽  
Experimental Tests ◽  
Degree Of Freedom ◽  
Gap Size ◽  
Single Degree Of Freedom ◽  
Single Degree ◽  
Impact System

A Numerical Model to Reproduce Vortex Induced Vibrations of a Circular Cylinder

2006 ◽  
Author(s):  
Marco Belloli ◽  
Giorgio Diana ◽  
Ferruccio Resta ◽  
Sara Muggiasca
Keyword(s):  
Numerical Model ◽  
Circular Cylinder ◽  
Mechanical System ◽  
Wind Velocity ◽  
Experimental Tests ◽  
Degree Of Freedom ◽  
Single Degree Of Freedom ◽  
Single Degree ◽  
Vortex Induced Vibrations ◽  
Linear Mechanical System

This article describes a numerical model to reproduce vortex induced vibrations of a circular cylinder. It consists in a single degree of freedom non linear mechanical system, with characterizing parameters identified on the basis of experimental tests in order to reproduce the main features of VIV, in particular vibration amplitudes as function of wind velocity and the energy introduction by the blowing fluid into the mechanical system.

scholarly journals External Periodic Force Control of a Single-Degree-of-Freedom Vibroimpact System

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Jingyue Wang ◽  
Haotian Wang ◽  
Tie Wang
Keyword(s):  
Periodic Orbits ◽  
Force Control ◽  
Time History ◽  
Degree Of Freedom ◽  
Bifurcation And Chaos ◽  
Periodic Force ◽  
Chaotic Motions ◽  
Single Degree Of Freedom ◽  
Single Degree ◽  
Impact System

A single-degree-of-freedom mechanical model of vibro-impact system is established. Bifurcation and chaos in the system are revealed with the time history diagram, phase trajectory map, and Poincaré map. According to the bifurcation and chaos of the actual vibro-impact system, the paper puts forward external periodic force control strategy. The method of controlling chaos by external periodic force feedback controller is developed to guide chaotic motions towards regular motions. The stability of the control system is also analyzed especially by theory. By selecting appropriate feedback coefficients, the unstable periodic orbits of the original chaotic orbit can be stabilized to the stable periodic orbits. The effectiveness of this control method is verified by numerical simulation.

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