scholarly journals Experimental and analytical study on high-speed fracture phenomena and mechanism of glass

2011 ◽  
Author(s):  
H. Sakamoto ◽  
S. Kawabe ◽  
Y. Ohbuchi ◽  
S. Itoh
Keyword(s):  
High Speed ◽  
Analytical Study

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.

Analysis of Tapered Roller Bearings Considering High Speed and Combined Loading

1976 ◽  
Vol 98 (4) ◽  
pp. 564-572 ◽  
Author(s):  
J. Y. Liu
Keyword(s):  
High Speed ◽  
Analytical Study ◽  
Roller Bearing ◽  
Combined Loading ◽  
Sliding Velocity ◽  
Friction Forces ◽  
Tapered Roller Bearing ◽  
Rolling Contacts ◽  
Tapered Roller ◽  
Tapered Roller Bearings

This paper presents an analytical study of the load distribution in a tapered roller bearing operating at a high speed and under combined loading. The friction forces at the rolling contacts and the cage forces are not considered. A numerical example showing, among other things, the effects of misalignment and speed on the bearing fatigue life and the sliding velocity at the flange contact is given.

scholarly journals Analytical Study to Check Safety of Folding-type Staircase in High Speed Rolling Stock

2014 ◽  
Vol 17 (2) ◽  
pp. 87-93
Author(s):  
Weon-Dae Lee ◽  
Sang-Kyu Park ◽  
Kyung-Kyu Lee ◽  
Jeong-Hun Lee
Keyword(s):  
High Speed ◽  
Analytical Study ◽  
Rolling Stock

scholarly journals ANALYTICAL STUDY OF THE UNLOADING PROCESS OF ELEVATOR BUCKETS

2021 ◽  
Vol 6 (6) ◽  
pp. 71-79
Author(s):  
A. Tihonov ◽  
A. Pol'shin ◽  
N. Lyubimyy ◽  
M. Gerasimov
Keyword(s):  
Friction Force ◽  
High Speed ◽  
Analytical Study ◽  
Theoretical Study ◽  
Bulk Material ◽  
Coriolis Forces ◽  
Advantages And Disadvantages ◽  
Discharge Regime ◽  
Mechanical Phenomena

The purpose of the article is to analyze the main results of the works that are used in the calculations of elevators with moderate speed modes, to clarify the suitability of their individual positions for developing the parameters of centrifugal unloading of high-speed elevators. Works devoted to the study of the operation of high-speed elevators, the results of which have not received a decent interpretation and development, are of considerable interest. As the efficiency of high-speed elevators is determined by the quality of centrifugal unloading and by the operation of the belt-drum mechanism without slipping, there is a need to analyze the work aimed at solving this problem. The paper presents known solutions for determining the parameters of centrifugal unloading, which are based on various hypotheses of the movement of material particles inside the bucket. The physical and mechanical phenomena that affect the movement of material particles in the elevator bucket are studied. The advantages and disadvantages of each hypothesis are revealed. The theoretical study of the process of centrifugal unloading is complicated by the fact that during the movement and exit of the material from the bucket, there is an unstable movement of the bulk material under the influence of a changing system of forces: the forces of attraction, centrifugal and coriolis forces, and the friction force. Meanwhile, even the simplest cases of material motion under a gravitational or mixed discharge regime are difficult to analyze theoretically. In this regard, the dependencies and methods of constructing the trajectories of the material movement are established, as well as the relevance of using a particular equation.

scholarly journals To the choice of the MAGLEV system traction linear synchronous motorstator winding scheme

2020 ◽  
Vol 6 (1) ◽  
pp. 48-62
Author(s):  
Konstantin K. Kim ◽  
Igor R. Kron ◽  
Vadim V. Veshkin
Keyword(s):  
High Speed ◽  
Analytical Study ◽  
Lateral Displacement ◽  
Single Layer ◽  
Stator Winding ◽  
Aim Analysis ◽  
Traction Motor ◽  
Higher Harmonics ◽  
Maglev System ◽  
Electromagnetic Processes

Aim: Analysis of electromagnetic processes in the linear synchronous traction motor of high-speed ground transport (MAGLEV) and the choice of stator winding connection schemejustification. Methods: An analytical study of theoretical relations. Results: The study found that a two-layer stator winding connection scheme is more preferable Conclusion: A system with a single-layer stator winding connection circuit is characterized by loading excitation solenoids with harmful forces, the inefficiency of their protection from the higher harmonics of the stator winding by choosing the geometry of its coil and solenoid, and the formation of additional colliding force during lateral displacement of the underframe. All these unadvisable effects are absent in a two-layer scheme.

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