scholarly journals Numerical and experimental study on dynamics of the planar mechanical system considering two revolute clearance joints

2021 ◽  
Vol 1 (2) ◽  
pp. 256-266
Author(s):  
Zhengfeng Bai ◽  
Fusong Xu ◽  
Jijun Zhao
Keyword(s):  
Experimental Study ◽  
Mechanical System ◽  
Clearance Joints

scholarly journals Study and Analysis of Anti Vibratory Passive and Active Methods Applied to Complex Mechanical System

2012 ◽  
Vol 7 (2) ◽  
Author(s):  
Cédric Lopez ◽  
François Malburet ◽  
André Barraco
Keyword(s):  
Experimental Study ◽  
Comparative Analysis ◽  
Mechanical System ◽  
High Speed ◽  
Test Bench ◽  
Minimization Method ◽  
Controlled System ◽  
Proper Frequency ◽  
Different Parts ◽  
Methods Of Control

This paper studies problematic of a mechanical system composed of different coupled parts submitted to a high speed shock and proposes analysis of anti vibratory passive and active methods based on an experimental and theoretical coupled approach. After a shock, different parts of the system oscillate. If one of them is excited at a particular frequency, such as its proper frequency, important oscillations appear and can lead to the deterioration of the system by introducing important stresses. In this paper, we propose an analysis in order to understand this kind of problem and what we can do to avoid it. Firstly, we discuss problematic and we expose the studied system. In a second time, we develop two approaches of modeling that allow us to understand the phenomenon by carrying out numerical simulations. Then cross checking of model is completed via experimental study on drop test bench. Passive minimization method of vibrations based on experimental and theoretical coupled approach is exposed. Finally, a comparative analysis of different methods of control and experimental results of controlled system are presented.

Analytic and Experimental Study of the Load Distribution on Spline Joints Length Considering the Contact Rigidity of the Bearing Surfaces

2012 ◽  
Vol 162 ◽  
pp. 74-83 ◽  
Author(s):  
Dan Mărgineanu ◽  
E. Mărgineanu ◽  
E.S. Zăbavă ◽  
A. M. Fârtă
Keyword(s):  
Experimental Study ◽  
Mechanical System ◽  
Elastic Properties ◽  
Load Distribution ◽  
Degrees Of Freedom ◽  
Surface Profile ◽  
Contact Rigidity ◽  
Contact Points ◽  
Actual Load ◽  
Contact Surfaces

The spline joints transmit torque from shafts to rotors by multiple contact surfaces. The joint's mechanical system is, therefore, undetermined, i.e. the number of contact points is much larger than the number of restricted degrees of freedom. Thus, the actual load distribution is greatly influenced by the joints elements elastic properties and their geometrical errors and surface profile. In this paper, an analytical and experimental study for the load distribution on the in joints length caused by the finite rigidity of the joints elements is presented.

scholarly journals 451 Simulation and experimental study of dynamic characteristics of mechanical system with clearance

2008 ◽  
Vol 2008.57 (0) ◽  
pp. 293-294
Author(s):  
Shozo KAWAMURA ◽  
Makoto SUZUKI ◽  
Hirofumi MINAMOTO ◽  
MD. Zahid Hossain
Keyword(s):  
Experimental Study ◽  
Mechanical System ◽  
Dynamic Characteristics

scholarly journals An experimental study of stochastic resonance in a bistable mechanical system

2012 ◽  
Vol 382 ◽  
pp. 012024 ◽  
Author(s):  
Honggang Hu ◽  
Kimihiko Nakano ◽  
Matthew P Cartmell ◽  
Rencheng Zheng ◽  
Masanori Ohori
Keyword(s):  
Experimental Study ◽  
Mechanical System ◽  
Stochastic Resonance

An Experimental Method for Erosion Evaluation for a Roller Coaster’s Carriage

2014 ◽  
Vol 656 ◽  
pp. 43-49
Author(s):  
Danuta Grad ◽  
Liviu Marian Ungureanu ◽  
Cristian Gabriel Alionte
Keyword(s):  
Experimental Study ◽  
Composite Material ◽  
Mechanical System ◽  
Experimental Method ◽  
Metallic Matrix ◽  
Theoretical Models ◽  
Metallic Structure ◽  
Erosion Behavior ◽  
The Times

This paper presents the erosion behavior of the metallic structure of the roller coaster’s carriage using an experimental method for erosion evaluation which permits a comparison with several theoretical models. The roller coaster’s carriage body is a rigid metallic structure and most of the times, for an appealing design, the surface of the carriage is coated with a composite material which uses a non-metallic matrix. It is expected that the experimental study to be extrapolated to another mechanical system which is moving outside.

Dynamic characteristics of planar linear array deployable structure based on scissor-like element with differently located revolute clearance joints

2017 ◽  
Vol 232 (10) ◽  
pp. 1759-1777 ◽  
Author(s):  
Bo Li ◽  
San-Min Wang ◽  
Viliam Makis ◽  
Xiang-Zhen Xue
Keyword(s):  
Mechanical System ◽  
Dynamic Characteristics ◽  
Equations Of Motion ◽  
Nonlinear Behavior ◽  
Friction Model ◽  
Dynamic Responses ◽  
Force Model ◽  
Clearance Joints ◽  
Deployable Structure ◽  
Clearance Joint

This paper comprehensively investigates the parametric effects of differently located revolute clearance joints on the dynamic behavior of planar deployable structure based on scissor-like element. Considering the real physical mechanical joints, the normal and the tangential forces in the revolute clearance joints are respectively modeled using Flores contact-force model and LuGre friction model. The resulting forces and moments are embedded in the equations of motion of the scissor deployable structure for accurately describing the effect of joint clearance and governing the dynamic response of this structure. The effects of the main parameters such as the location of the clearance joint, the clearance size and the number of clearance joints on the dynamic characteristics of a multibody mechanical system have been numerically evaluated, and the results indicate that joints at different locations in a mechanical system have different sensitivities to the clearance size, and the more sensitive joint should be controlled to reduce the nonlinear behavior of this structure. Also, it can be concluded that the motion in one revolute clearance joint will affect the motion in the other clearance joints and the dynamic interaction of clearance joints is the important source of structural behavior change. Therefore, in order to accurately predict the dynamic responses of the mechanical system, the clearance effect of each joint on the multibody system should be investigated and understood.

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