- 积分
- 1
- 注册时间
- 2005-10-8
- 仿真币
-
- 最后登录
- 1970-1-1
|
本帖最后由 alex_shoal 于 2010-3-16 15:00 编辑
本人在试着粗算一下AWG12的裸铜线的温升。
但是感觉结果会和实际差很多。
excel算是17度温升,
ANSYS算是3度温升。
不知道那个会更接近实际。
望高手指点。谢谢。
现附APDL,供大家提意见。
!CABLE TEMPERATURE RISE ANALYSIS
!ELECTRICAL-THERMAL CASE
!2010-3-18 BY ALEX SHOAL
!EMAIL:ALEX.SHOAL@GMAIL.COM
!------FILE ENVIRONMENT
FINISH
/CLEAR,
/COM, Thermal
/FILNAME,Cable_thermal,0
/SHOW,WIN32c ! Use /SHOW,X11C for UNIX
/CONT,1,255 !set up the number of contours
!LOCA=1 means at home,else means in office.
LOCA=2
*IF,LOCA,EQ,1,THEN
/CWD,'E:\'
*ELSE
/CWD,'D:\'
*ENDIF
!**********PARAMETER SETUP
! *** Set convection coefficients of surrounding
h1 = 4e-6 !W/mm^2*C
! *** Set electrical resistivities
rho1 = 1.68e-5 !ohm*mm - 100% !resistivity of copper
! *** Set thermal conductivities
kx1 = 0.385 !W/mm C !conductivity of Copper
! *** set the specific heat capacity
c_cable=0.385
!*** INPUT DATA
!AWG 12
cur_load = 9.3 !Amount of current in model
L=20 !LENGTH OF CABLE
DIA=2.05232 !DIAMETER OF CABLE,UNIT:mm
Ts=25 !TEMPERATURE OF SUROUND
!***
/prep7
CYL4,0,0,DIA
VOFFST,1,L
/prep7
! *** create model of cable ***
ET,1,SOLID69
! *** Material Properties - CABLE ***
mp,kxx,1,kx1
mp,rsvx,1,rho1
!MP,C,1,0.400
VSEL,S,VOLU,,1
VATT,1,,1
ESIZE,0.4
VSEL,S,VOLU,,1
VSWEEP,ALL
!------SOLUTION
/solu
! *** Apply current ***
ASEL,S,AREA,,1
NSLA,S,1
cp,next,volt,all
!cp,next,temp,all
*get,cur_1,node,,num,min
f,cur_1,amps,cur_load
! *** Apply 0 Voltage ***
ASEL,S,AREA,,2
NSLA,S,1
cp,next,volt,all
!cp,next,temp,all
*get,volt_0,node,,num,min
d,volt_0,volt,0
! *** Apply Convection ***
ASEL,ALL
ASEL,U,AREA,,1,2
nsla,s,1
SF,ALL,CONV,H1,Ts !set up the convection condition with surrounding for all outside surface.
!SF,ALL,RDSF,0.9,1
TOFFST,273 !set the offset between the absolute zero and zero.
TUNIF,Ts !setup the original temperature
/SOLU
allsel
TIME,1
outres,all,all
NSUBST,50,100,5
save
solve
/post1
set,1
!/triad,off
*get,JBNM,active,0,jobnam
!h5a = h1
/title,2010-3-15, %JBNM%, I = %cur_load%, h = %h1%,
! *** Plot Temperature Distribution ***
plnsol,temp |
本帖子中包含更多资源
您需要 登录 才可以下载或查看,没有账号?注册
×
|