Study on Accurate Thermal Modeling of Press-Pack IGBT Module with Asymmetric Double-Side Cooling Structure based on Structure Function Curve by Orthogonal Experimental Design

Author(s):  
Zechun Dou ◽  
Guozhong Dong ◽  
Guoyou Liu ◽  
Haihui Luo ◽  
Yangang Wang ◽  
...  
2014 ◽  
Vol 494-495 ◽  
pp. 461-465 ◽  
Author(s):  
Bao Shou Sun ◽  
Zhe Hong ◽  
Long Qing Xu ◽  
Xue Dao Shu ◽  
Bo Qin Gu ◽  
...  

This paper simulates the process of the high-neck flange closed rolling on DEFORM-3D and optimizes the rolling process parameter by analyzing the results based on the orthogonal experimental design. For the high-neck flange, the results show that the effects on ellipticity are in the order of the mandrel feed speed, the main roll rotational speed and initial blank temperature. The former two factors show the significance while the initial blank temperature does not show that.


2014 ◽  
Vol 18 (5) ◽  
pp. 1714-1715
Author(s):  
Li-Li Wu ◽  
Ting-Ting Cheng ◽  
Chuan Xu ◽  
Ting Chen

The parameters of the dual slot die in an industrial melt blowing equipment are designed optimally using the orthogonal experimental design method. The air flow fields of different die parameters are simulated. Effects of the die parameters are analyzed using variance analysis. The results show that the inset distance and slot width have significant effects on the air flow field while effect of the slot angle is unremarkable.


2018 ◽  
Vol 142 ◽  
pp. 03002
Author(s):  
Yunhai Jia ◽  
Lixin Zhu

Ti-6Al-4V components are the most widely used titanium alloy products not only in the aerospace industry, but also for bio-medical applications. The machine-ability of titanium alloys is impaired by their high temperature chemical reactivity, low thermal conductivity and low modulus of elasticity. Polycrystalline cubic boron nitride represents a substitute tool material for turning titanium alloys due to its high hardness, wear resistance, thermal stability and hot red hardness. For determination of suitable cutting parameters in dry turning Ti-6AL-4V alloy by Polycrystalline cubic boron nitride cutting tools, the samples, 300mm in length and 100mm in diameter, were dry machined in a lathe. The turning suitable parameters, such as cutting speed, feed rate and cut depth were determined according to workpieces surface roughness and tools flank wear based on orthogonal experimental design. The experiment showed that the cutting speed in the range of 160~180 m/min, the feed rate is 0.15 mm/rev and the depth of cut is 0.20mm, ideal workpiece surface roughness and little cutting tools flank wear can be obtained.


RSC Advances ◽  
2019 ◽  
Vol 9 (20) ◽  
pp. 11305-11311 ◽  
Author(s):  
Changhao Dai ◽  
Zihao Zhang ◽  
Tianchi Wang

Lightweight Al2O3–ZrO2(Y2O3) hollow fibers with low thermal conductivity were prepared by a natural template—cogon grass.


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