Influence of Pulsed Power Equipment’s Driving Manners on Launching Process of the Electromagnetic Coil

2011 ◽  
Vol 383-390 ◽  
pp. 4895-4900
Author(s):  
Peng Sun ◽  
Bin Lei ◽  
Zhi Yuan Li ◽  
Ke Yi Zhao ◽  
Chun Long Guo
Keyword(s):  
Finite Element ◽  
Dynamic Process ◽  
Electromagnetic Force ◽  
Pulsed Power ◽  
Power Equipment ◽  
Transient Solution ◽  
Working Process ◽  
Dynamic Changes ◽  
Electromagnetic Coil ◽  
Protective System

For improving launching velocity and efficiency of intercepting plate in active electromagnetic armor protective system, theoretically analyzing the main parameters that determine the change of electromagnetic force. Investigating the system dynamic changes in different pulsed power equipment driving manners. Combining different driving manners, the dynamic working process of the intercepting plate launcher are simulated, that adopting finite element analytic software Ansoft’s transient solution to simulate the dynamic process of intercepting plate. The maximum velocities obtained in the bipolar driving manner and in the single-polar driving manner are 12.61 m/s and 14.00 m/s respectively. Analysis shows that the effect of the electromagnetic force is not only related with the driving manners but also with the materials.

Finite Element Simulation and Analysis for the Working Process of Working-Roll of Carder

2013 ◽  
Vol 670 ◽  
pp. 76-79
Author(s):  
Bao Guo Yang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Radial Displacement ◽  
Three Dimensional ◽  
Work Roll ◽  
Middle Part ◽  
Working Process ◽  
Element Analysis ◽  
Analog Simulation ◽  
Roll Axis

The three-dimensional models of the Working-roll of Carder are founded by three-dimensional design software Solidworks and the working process of Working-rolls is simulated by finite element analysis software Cosmos, which obtain overall stress distribution for the Working-roll of Carder. The relations between the working-rolls with different thickness and different length of work roll axis and the stress, strain and radial displacement in the working process of working-rolls are attained by finite element analysis and the important factors of impact of work roll deformation are indicated by analog simulation. The results show that the maximum stress and maximum strain are occur in the place of roller connected with the axis rather than to appear in the middle part of roller and the radial displacement in the working process of working-rolls and the length of work roll axis are not directly relationship. The Finite element analysis results provide an important theoretical basis to design a reasonable the length of axis and the thickness of roller for the working-roll of carder.

Vibration Analysis of Motor Stator

2014 ◽  
Vol 902 ◽  
pp. 140-143
Author(s):  
Rong Ge Yan ◽  
Xu Feng ◽  
Li Hua Zhu ◽  
Qing Xin Yang
Keyword(s):  
Finite Element ◽  
Electromagnetic Force ◽  
Electromechanical Coupling ◽  
Natural Frequencies ◽  
Good Method ◽  
Essential Elements ◽  
Electrical Machine ◽  
Element Analysis ◽  
Coupling System ◽  
Spectrum Distribution

Motor vibration is one of the main causes of the motor noise, and the vibration of the motor also brings great harm for the safe and reliable operation of the motor load system. The vibration and noise level is one of the essential elements in evaluating the electrical machines quality. Accurate calculation of the stator natural frequencies and harmonic response of an electrical machine is essential to the prediction of the vibration. This paper takes the common Y series induction motors as the sample. The motor is a complex electromechanical coupling system, which includes stator and rotor. The finite element analysis is used to study on the stator modal shapes and natural frequencies of the induction motor. Then this paper calculates the electromagnetic force by using the finite element method, and gets the spectrum distribution of the radial electromagnetic force. Thus it provides a good method for the motor design by predicting natural frequency and optimizing the motor parameters to avoid resonance. All of them provide theory fundamental basis and technical support for reducing vibration and noise of the motor.

Study on the Dynamic Characteristics of the Winding Head

2016 ◽  
Vol 693 ◽  
pp. 213-220
Author(s):  
Jiang Yan ◽  
Yong Xing Wang ◽  
Su Jia Li ◽  
Xi Hou ◽  
Sheng Ze Wang
Keyword(s):  
Finite Element ◽  
Dynamic Characteristics ◽  
Filament Winding ◽  
Time Varying ◽  
Working Process ◽  
Coupling Stiffness ◽  
Spindle Structure ◽  
Full Volume ◽  
Stiffness Coupling

According to the structure and production processing requirements of polyester filament winding head, a finite element dynamic model of the winding system in parameters time-varying was established. By using the method of numerical calculation, the dynamic characteristics of the winding head were analyzed in three processes: rapid starting-up in empty volume, winding filament process and stopping in full volume. By studying the influence of the three processing under large stiffness coupling and soft stiffness coupling in the winding head, the role of the coupling stiffness and spindle structure was revealed in different working process.

An assessment of the Sachs method for measuring residual stresses in cold worked fastener holes

1998 ◽  
Vol 33 (4) ◽  
pp. 263-274 ◽  
Author(s):  
D J Smith ◽  
C G C Poussard ◽  
M J Pavier
Keyword(s):  
Finite Element ◽  
Residual Stresses ◽  
Cold Working ◽  
Element Model ◽  
Fe Model ◽  
Working Process ◽  
Element Analysis ◽  
Near Surface ◽  
Cold Worked ◽  
Good Agreement

Measurements of residual stresses in 6 mm thick aluminium alloy 2024 plates containing 4 per cent cold worked fastener are made using the Sachs method. The measurements are made on discs extracted from the plates. The measured tangential residual stress distribution adjacent to the hole edge are found to be affected by the disc diameter. The measured residual stresses are also in good agreement with averaged through-thickness predictions of residual stresses from an axisymmetric finite element (FE) model of the cold working process. A finite element analysis is also conducted to simulate disc extraction and then the Sachs method. The measured FE residual stresses from the Sachs simulation are found to be in good agreement with the averaged through-thickness predicted residual stresses. The Sachs simulation was not able to reproduce the detailed near-surface residual stresses found from the finite element model of the cold working process.

An Optimal Design for New Electromagnetic Valve in Camless Engines

2013 ◽  
Vol 479-480 ◽  
pp. 360-364
Author(s):  
Ly Vinh Dat ◽  
Yao Jung Shiao ◽  
Thanh Phuc Le
Keyword(s):  
Finite Element ◽  
Maximum Speed ◽  
Electromagnetic Valve ◽  
Electromagnetic Coil ◽  
Camless Engines ◽  
Si Engines ◽  
Space Limit ◽  
Dimension Space ◽  
Actuator Control ◽  
Hybrid Actuator

Some previous studies have demonstrated that electromagnetic valve (EMV), which uses permanent magnet and electromagnetic coil (PM/EM) hybrid actuator, has some benefits about actuator control, energy consumption, time response compared with conventional EMVs. In this paper, a new EMV with PM/EM actuator, which significantly differs from existing EMVs, has been proposed. The EMV design has been examined and analyzed by finite element. The results conclude that the EMV satisfies the requirement of dimension space limit. Moreover, the optimal EMV design meets the requirements of transition time and holding force. The holding force can reach about 719 N and drop 42.22% for valve releasing if desired current is supplied to the coils. Therefore, the EMV can fully control the closed and open of valve timings at maximum speed in SI engines.

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