Balancing of High Speed Machinery

1967 ◽  
Vol 89 (1) ◽  
pp. 111-117 ◽  
Author(s):  
Chi-Yeh Han
Keyword(s):  
Phase Angle ◽  
Analytical Method ◽  
Digital Computer ◽  
High Speed ◽  
Mechanical Systems ◽  
Constant Speed ◽  
Mass Moment ◽  
Balance Weight ◽  
Optimal Values ◽  
Complete Revolution

An analytical method for optimal balancing of the shaking forces and the shaking moments of force of any plane mechanism driven by a constant speed shaft is developed. The optimal values of phase angle and mass moment of the balance weight on the driving shaft are ascertained, such that the variation of load on the machine supports due to shaking forces and shaking moments of force will be a mininum through a complete revolution of the driving shaft. Using a digital computer, this method is applicable to complicated mechanical systems; an illustrative example follows the analysis.

Numerical Modeling and Simulation Analysis of Temperature Field of Disc Brake on Trains

2011 ◽  
Vol 199-200 ◽  
pp. 1492-1495 ◽  
Author(s):  
Guo Shun Wang ◽  
Rong Fu ◽  
Liang Zhao
Keyword(s):  
Temperature Field ◽  
Temperature Gradient ◽  
High Speed ◽  
Large Scale ◽  
Working Condition ◽  
Constant Speed ◽  
Brake Disc ◽  
Disc Brake ◽  
Brake Pad ◽  
Finite Element Software

The simulation calculation on the temperature field of the disc brake system on high-speed trains under the working condition of constant speed at 50Km/h is made. A steady-state calculation model is established according to the actual geometric size of a brake disc and a brake pad, and the analog calculation and simulation on the temperature field of the brake disc and the brake pad by using the large-scale nonlinear finite element software ABAQUS are carried out. The distribution rules of the temperature field of the brake disc and the brake pad under the working condition of constant speed are made known. The surface temperature of the brake disc at friction radius is the highest, with a band distribution for temperature. There exists a temperature flex point in the direction of thickness, of which the thickness occupies 15% of that of the brake disc; due to the small volume of the brake pad, the temperature gradient of the whole brake pad is not sharp, and larger temperature gradient occurs only on the contact surface.

Controlled Arming of Mechanical Systems Embedded into Embarked Electrical Systems

2014 ◽  
Vol 555 ◽  
pp. 209-216
Author(s):  
Gheorghe Negru
Keyword(s):  
Kalman Filter ◽  
Mechanical System ◽  
High Speed ◽  
Mechanical Systems ◽  
Electrical Systems ◽  
General Motion

The paper presents an application of the Kalman filter to achieve the controlled arming of mechanical system embedded into embarked electrical systems (FMES). The solution of FMES which contain mechanical subsystems electronically controlled could significantly reduce the influence, on their functioning, of the general motion of high speed object (HSO) .

An Experimental and Analytical Study of Connection Forces in High-Speed Mechanisms

1975 ◽  
Vol 97 (4) ◽  
pp. 1166-1174 ◽  
Author(s):  
S. Dubowsky ◽  
S. C. Young
Keyword(s):  
High Speed ◽  
Analytical Study ◽  
Dominant Role ◽  
Mechanical Systems ◽  
Design Engineers ◽  
Experimental Behavior ◽  
Dynamic Forces

The increases in the dynamic forces within the connections of high-speed mechanical systems due to connection clearances and mechanism elasticity are of great interest to design engineers. These forces, which can play a dominant role in the performance and life of these systems, are experimentally studied in this investigation, and the observed experimental behavior is correlated with the results of analytical predictions. The experiments performed confirm the importance of clearances in machine joints on the amplification of connection forces. The effects of connection friction and mechanism elasticity on the connection forces are also investigated.

The Wall Effect in Cavity Flow

1966 ◽  
Vol 88 (1) ◽  
pp. 132-136 ◽  
Author(s):  
D. K. Ai
Keyword(s):  
Flow Field ◽  
Flat Plate ◽  
Integral Equations ◽  
Nonlinear Theory ◽  
Digital Computer ◽  
High Speed ◽  
Cavity Flow ◽  
Channel Width ◽  
Wall Effect ◽  
Plate Location

A nonlinear theory for the calculation of the flow field of an oblique flat plate under blockage condition is given using the techniques of integral equations. Numerical results are obtained with the aid of a high-speed digital computer for the plate situated midchannel at values of the angle of attack from 10 to 90 deg and the channel width-chord ratio from 3 to 20. Although the theory is developed for arbitrary plate location, the midchannel case is of great interest due to the fact that most of the tests are performed at this position.

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