Research on Temperature Field of Variable Frequency Motor

2013 ◽  
Vol 273 ◽  
pp. 355-359
Author(s):  
Yao Hui Wu ◽  
Xiao Mei Liu ◽  
Xiu Feng Meng ◽  
Hong Tu Zhao
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Induction Motor ◽  
Temperature Rise ◽  
Experimental Tests ◽  
Transient Temperature ◽  
Variable Frequency ◽  
Element Analysis ◽  
Finite Element Software ◽  
Frequency Power

To the problem of small induction motor that supplied by Variable frequency power temperature rise, according to the basic theory of heat transfer and using finite element analysis software, in the paper, it established a motor of two-dimensional transient temperature field model ,though the equivalent simplify of the structure and thermal conductivity, and the compare between the simulation of finite element software studies and the temperature experimental tests , It confirms the affect that variable frequency power on the motor temperature rise, and finds a simplified simulation of motor temperature field and parameters equivalent approach which do provide effective help to the design and use of the induction motor.

Finite Element Analysis about the Influence that High-Speed Motorized Spindle Spindle System Material has on its Temperature Field

2013 ◽  
Vol 712-715 ◽  
pp. 1209-1212 ◽  
Author(s):  
Ke Zhang ◽  
Xiang Nan Ma ◽  
Li Xiu Zhang ◽  
Wen Da Yu ◽  
Yu Hou Wu
Keyword(s):  
Heat Transfer ◽  
Finite Element ◽  
Temperature Field ◽  
Heat Transfer Rate ◽  
Transfer Rate ◽  
High Speed ◽  
Ceramic Materials ◽  
Motorized Spindle ◽  
Element Analysis ◽  
Finite Element Software

The article has analyzed the changes of temperature of different materials of the spindle, and considered 170SD30 Ceramic Motorized Spindle and the same model Metal Motorized Spindle as the research objects, analyzed the inside heat source and heat transfer mechanism of the high-speed motorized spindle; used finite element software to set up the model of the motorized spindle, and did simulation and analysis. Verified by simulation, heat transfer rate of ceramic materials is slower than the metallic materials, in actual operation of the process, due to different materials have different heat transfer rate, so the temperature distribution of the different materials of motorized spindle are different. This conclusion provides the basis to solve motorized spindle temperature field distribution.

Modeling NiTi Superelastic-Shape Memory Antagonistic Beams: A Finite Element Analysis

2009 ◽  
Author(s):  
Majid Tabesh ◽  
Mohammad Elahinia ◽  
Mehdi Pourazady
Keyword(s):  
Finite Element ◽  
Body Temperature ◽  
Shape Memory ◽  
Pedicle Screws ◽  
Experimental Tests ◽  
Element Analysis ◽  
Major Drawback ◽  
Screw Design ◽  
Finite Element Software ◽  
Engineering Sciences

Shape memory alloys (SMA) have received widespread attention from researchers in various fields of engineering sciences due to their exceptional properties of shape memory and superelasticity. NiTi equiatomic alloys among other SMA, show acceptable biocompatibility to be implemented in biomedical applications. Applications of NiTi in biomedical areas specifically orthopedics, demonstrate its unique performance which is not achievable with conventional materials. Pedicle screws, which are used as an anchoring point for implanting spinal instrumentations in spinal fracture and deformity treatments, entail a major drawback; i.e. loosening and back-out. The strength of screw contact with the surrounding bone diminishes as the bone degrades due to osteoporosis. A “Smart” pedicle screw design was developed to address this issue which uses NiTi superelastic-shape memory coils wrapped around it. The smart assembly consists of external superelastic tubing which is responsible for expanding the designed protrusions when they reach body temperature; also an internal shape memory wire inserted into the tubing is sought to retract the assembly when locally heated to above body temperature. The whole assembly was modeled as a beam structure in COMSOL Multiphysics Finite Element software. The behavior of shape memory alloy was defined in the software via its Partial Differential Equation (PDE) module. The SMA model has is a Tanaka-based model and is capable of capturing shape memory effect, superelasticity and hysteresis behavior, and partial transformation in both positive and negative directions. This 1D model was further modified to be included in a 3D framework such that it makes it possible for simulation of a beam under bending. The functionality of the smart screw design can be studied via this FEM model as a future work and the outcomes of the simulation can be compared with experimental tests on the prepared sample of the screw comprising NiTi tubing and wires.

FEM simulation of laser forming process of shipbuilding steel plate

2004 ◽  
Vol 120 ◽  
pp. 507-512
Author(s):  
Zhang Liwen ◽  
Zhong Qi ◽  
Pei Jibin ◽  
Zhang Guoliang ◽  
Xia Yuanliang
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Thermal Stresses ◽  
Steel Plate ◽  
Fem Simulation ◽  
Laser Forming ◽  
Transient Temperature ◽  
Forming Process ◽  
Shipbuilding Steel ◽  
Finite Element Software

Laser forming has become a promising technique to form sheet metal in recent years. This new forming process can produce plastic deformation by thermal stresses resulted from the irradiation of laser beam scanning. In this paper, a 3-D thermo-mechanical FEM model was developed to simulate the laser forming process of shipbuilding steel plate. The finite-element software MSC.Marc was used to calculate the temperature field, stress field and strain field during laser forming process. The transient temperature field and the final bending angle were predicted. Then the effect of laser forming process technical parameters was studied. To evaluate the accuracy of the simulation, a laser forming experiment was performed. It is demonstrated that the finite element simulation results are in good agreement with experimental results.

Finite Element Analysis of Temperature Field of Traction Motor

2012 ◽  
Vol 189 ◽  
pp. 461-464
Author(s):  
An Xing Zhu ◽  
Zhi Xiong Yang ◽  
Yi Cui
Keyword(s):  
Heat Transfer ◽  
Finite Element ◽  
Temperature Field ◽  
Convective Heat Transfer Coefficient ◽  
Transient Temperature ◽  
Iron Core ◽  
Field Calculation ◽  
Three Dimension ◽  
Element Analysis ◽  
Traction Motor

Due to the fact of immeasurable inner temperature of inverter-fed traction motor, three-dimension finite element model of part of rotor iron core and half a rotor bearing were established. The convective heat transfer coefficient between the air gap of motor and rotor surface were calculated by the heat transfer and fluid mechanics theory. The influence of temperature rise on the stator and rotor resistance was considered for thermal loss calculation. The influence of the end of stator and rotor on axial temperature distribution was also taken into account. Then three-dimensional transient temperature field of the motor was simulated at the rated load. Temperature field with different loads was also computed. The aim has been to optimize the design with respect to the transient stresses. According to contrastive analysis compared with other method, it demonstrated the accuracy of simulation model and thermal field calculation results.

Temperature Field Due to a Moving Heat Source: A Moving Mesh Finite Element Analysis

1985 ◽  
Vol 52 (2) ◽  
pp. 274-280 ◽  
Author(s):  
Z.-B. Kuang ◽  
S. N. Atluri
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Heat Source ◽  
Process Zone ◽  
Surrounding Medium ◽  
Moving Mesh ◽  
Transient Temperature ◽  
Moving Heat Source ◽  
Element Analysis ◽  
External Agent

The transient temperature field (as seen by a moving observer) due to a moving heat source, such as the process zone near a dynamically propagating crack tip or an external agent as in the case of welding, is analyzed by a moving-mesh finite element procedure. The effects of the temperature-dependent material properties, and of the loss of heat to the surrounding medium through convection and radiation, are studied. Situations under which conditions in the process zone may be labeled as “isothermal” or “adiabatic” are explored. Estimates of temperature rise near the tip of a crack propagating at realistic speeds in structural steels are made.

Thermal Characteristic Analyses of NC Machine Spindle System

2012 ◽  
Vol 479-481 ◽  
pp. 2481-2484 ◽  
Author(s):  
Zhong Qi Sheng ◽  
Xiang Dong Shi ◽  
Sheng Li Dai ◽  
Yan Jin
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Thermal Deformation ◽  
Thermal Characteristic ◽  
Numerical Control ◽  
Transient Temperature ◽  
Element Analysis ◽  
Spindle System ◽  
Nc Machine ◽  
Machine Spindle

This paper used finite element method to analyze thermal characteristics of numerical control (NC) machine spindle system, and studied the steady temperature field and the transient temperature field of the machine tool and the thermal deformation of the spindle at 3000 rpm. General finite element analysis software ANSYS is used for analysis. Through the analysis of the temperature field and thermal deformation of the spindle system, this paper finally obtained the deformation situation of the spindle system in thermal load. By changing the boundary conditions of the spindle system to analyze the heat distortion of the spindle system and the results showed that assembling a cooling jacket in front of the spindle box can signally reduce the thermal error of the spindle system.

Numerical study of the stand-off distance and liner thickness effect on the penetration depth efficiency of shaped charge process

2018 ◽  
Vol 233 (3) ◽  
pp. 977-986 ◽  
Author(s):  
P Dehestani ◽  
AR Fathi ◽  
HR Mohammadi Daniali
Keyword(s):  
Finite Element ◽  
Penetration Depth ◽  
Numerical Study ◽  
Experimental Tests ◽  
Shaped Charge ◽  
Thickness Effect ◽  
Geometrical Parameters ◽  
Element Analysis ◽  
Finite Element Software ◽  
Jet Penetration

The aim of this paper is to investigate the effect of geometrical parameters on the performance of jet penetration in the process of shaped charge. To this end, the finite element analysis was used to simulate the process. The simulated process was validated by experimental tests and the effect of some parameters including stand-off distance and the liner thickness on the jet penetration depth was studied. The results indicated that choosing the optimal distance between the liner and the target (stand-off distance) can significantly affect the performance of jet penetration in the target. In addition, examining the effect of liner thickness on the penetration depth efficiency revealed that by decreasing the liner thickness, the jet penetration depth on the target increases. It should be noted that ABAQUS finite element software was used in this simulation to analyze the process of shaped charge.

Laser-Induced Thermal Damage to K9 Glass on Finite Element Method

2013 ◽  
Vol 444-445 ◽  
pp. 1422-1426
Author(s):  
Li Zi Chen ◽  
Chun Yuan Jing ◽  
Xiao Wei Guan
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Thermal Stress ◽  
Stress Field ◽  
Thermal Damage ◽  
Laser Damage Threshold ◽  
Element Analysis ◽  
Finite Element Software ◽  
Thermal Stress Field ◽  
K9 Glass

Based on the theory of the thermal conduction and the thermal elastic equations, does some researches in view of the thermal Damage of K9 glass by finite element analysis. The distribution of temperature field and thermal stress field of the ideal K9 glass which irradiated by 100W pulsed-Nd: YAG laser are simulated with finite element software. The result shows that the temperature of the surface of glass doesnt reach the melting and the thermal stress of it doesnt get to the requirement for fracture strength. Then, the model of K9 glass containing inclusions has be built. The simulation result indicates that inclusions may affect the distribution of temperature field and thermal stress field of the K9 glass, which makes the injected laser beams energy centralize on a small area around the inclusions owing to the existence of the strong absorbing, thus leading to K9 glass laser damage threshold reduction and easier to thermal damage.

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