Dynamic Processes of Rotating System with Coupling

2006 ◽  
Vol 113 ◽  
pp. 213-218 ◽  
Author(s):  
Vytautas Barzdaitis ◽  
Marijonas Bogdevicius ◽  
Rimantas Didžiokas
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Elastic Plate ◽  
Diagnostic System ◽  
Complex Model ◽  
Dynamic Processes ◽  
Machine Condition ◽  
Rotating System ◽  
Machine Condition Monitoring ◽  
Dynamics And Vibration

The article concerns dynamics and vibration of a high power rotating system with toothed wheel coupling that inserts elastic plate packets. Theoretical modeling and simulation of the rotating system with toothed wheel coupling have been provided by a finite element method. Complex model involved a rotating system, hydrodynamic bearings and coupling. The dynamics of semi-couplings and plates have been simulated. Experimental measurement of vibration has been measured with stationary machine condition monitoring and a diagnostic system.

Modeling Method for Complex Structure System in Finite Element Simulating Analysis

2011 ◽  
Vol 130-134 ◽  
pp. 195-199
Author(s):  
Xue Ling Zhang ◽  
Ya Hui Hu ◽  
Shu Feng Chai
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Direct Relationship ◽  
Complex Structure ◽  
Complex Model ◽  
System Structure ◽  
Structure System ◽  
Modeling Methods ◽  
Simulating Analysis ◽  
Element System

How to deal with the model is important in analyzing structure system with finite element method, because the rationality of model has direct relationship with veracity of simulation result. In this paper some simplify modeling methods are expatiated. And an approach is supposed that combine simplifying complex model and rigid-treating sub-component which make model more close to reality. In final, an instance of multi-type-element system structure is computed to prove the correctness of the method.

Remote Machine Condition Monitoring Using Wireless Web Technology

2009 ◽  
Vol 419-420 ◽  
pp. 745-748 ◽  
Author(s):  
Dai Zhong Su ◽  
Wen Jie Peng
Keyword(s):  
Condition Monitoring ◽  
Diagnostic System ◽  
Web Technology ◽  
Expert Advice ◽  
Machine Condition ◽  
Processing Scheme ◽  
Time Frequency ◽  
Diagnosis And Prognosis ◽  
Machine Condition Monitoring ◽  
Condition Monitoring System

A remote real-time machine condition monitoring system is reported in this paper, which is applied for diagnosis and prognosis of gearboxes’ working condition. Within the system, the diagnostic classification is performed by pattern recognition using statistic parameters, and remote diagnostic capability is enhanced by applying Wireless Web technology. An online signal-processing scheme is adopted based on time-frequency analysis, digital filtering and statistic parameter algorithm to detect early fault signals of gears and to provide expert advice for decision making for maintenance. The effectiveness of the developed remote diagnostic system is verified via experimental investigation of monitoring a gearbox on a test rig under different conditions.

Buckling Analysis of Stiffened Plate with Local Imperfections under In-Plane Bending

2013 ◽  
Vol 351-352 ◽  
pp. 290-296
Author(s):  
Qi Feng Chen ◽  
Mu Yu Liu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Elastic Plate ◽  
Plate Theory ◽  
Buckling Analysis ◽  
Elastic Buckling ◽  
Stiffness Ratio ◽  
Stiffened Plate ◽  
Buckling Behavior ◽  
Buckling Coefficient

Elastic buckling of stiffened plate with local imperfections were presented in this paper. As its difficult to analysis buckling character of the stiffened plate with local imperfections by using elastic plate theory, this paper used finite element method (FEM) to model 30 different cases of local imperfections in stiffened plate, and analysed how the size, depth and direction of local imperfections affect the critical buckling coefficient of the stiffened plate. Results shown that, the size, depth and direction of local imperfections are have significant impact to the buckling behavior of stiffened plate, the largest decrease of critical buckling coefficient due to the local imperfection reaches 30% in this paper, and the critical buckling coefficient of stiffened plate with smaller stiffness ratio is more susceptible to the local imperfections.

scholarly journals Unsteady MHD Heat Transfer in Couette Flow of Water at 4°C in a Rotating System with Ramped Temperature via Finite Element Method

2017 ◽  
Vol 22 (1) ◽  
pp. 145-161 ◽  
Author(s):  
G.J. Reddy ◽  
R.S. Raju ◽  
J.A. Rao ◽  
R.S.R. Gorla
Keyword(s):  
Heat Transfer ◽  
Finite Element Method ◽  
Finite Element ◽  
Couette Flow ◽  
Numerical Solutions ◽  
Shear Stresses ◽  
Rotating System ◽  
Laplace Transform Technique ◽  
Primary Velocity ◽  
Element Method

Abstract An unsteady magnetohydromagnetic natural convection on the Couette flow of electrically conducting water at 4°C (Pr = 11.40) in a rotating system has been considered. A Finite Element Method (FEM) was employed to find the numerical solutions of the dimensionless governing coupled boundary layer partial differential equations. The primary velocity, secondary velocity and temperature of water at 4°C as well as shear stresses and rate of heat transfer have been obtained for both ramped temperature and isothermal plates. The results are independent of the mesh (grid) size and the present numerical solutions through the Finite Element Method (FEM) are in good agreement with the existing analytical solutions by the Laplace Transform Technique (LTT). These are shown in tabular and graphical forms.

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