请教：电缆受热分析

menyueqi

请教：电缆的热分析

大家好，我做了一个电缆的有限元分析，是关于受热电缆中传输信号的变化问题。将电缆和聚乙烯的外层放在受热的空气中。我考虑的是二维横截面问题，命令流如下，但是得出的结果是温度全都变成空气的温度了。若加把电载荷的话，请问应该如何施加。请指教了，谢谢了呀。
/PREP7  
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ET,1,PLANE55
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MPTEMP,,,,,,,,  
MPTEMP,1,20
MPTEMP,2,100
MPDATA,KXX,1,,395   
MPDATA,KXX,1,,392   
MPTEMP,,,,,,,,  
MPTEMP,1,20
MPTEMP,2,100
MPDATA,C,1,,381
MPDATA,C,1,,399
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MPTEMP,,,,,,,,  
MPTEMP,1,0  
MPDATA,KXX,2,,0.167
MPTEMP,,,,,,,,  
MPTEMP,1,0  
MPDATA,C,2,,1842
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CYL4, , ,0.003
CYL4, , ,0.003, ,0.004  
aglue,all,
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TYPE,   1   
MAT,       1
amesh,1
TYPE,1
MAT,2
amesh,3
FINISH
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/SOLU
ANTYPE,4
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TRNOPT,FULL
LUMPM,0
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DELTIM,0.01,0,0
KBC,1.0
TIME,0.01   
TIMINT,0
IC,ALL,TEMP,20
lsel,s,,,5,8
SFL,all,CONV,57, ,100,
SOLVE
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DELTIM,18,3,45  
AUTOTS,1
KBC,1.0
TIME,18000  
TIMINT,1
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OUTRES,ALL,ALL,
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OUTPR,BASIC,ALL,
solve   
FINISH
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/POST1  
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PLNSOL, TEMP,, 0