ansys导线短路温度场仿真出现了负值
在ansys温度场求解时温度出现了负值或低于最初的设定值（20℃）我的模型是两根铜导线搭接到一起，中间短路点被碳化（选用炭材料）导线外有绝缘皮。给导线通短路电流，并计算产生的温度场。在求解计算时，我不加绝缘皮（只有两根铜导线和中间的炭化点）时不存在温度降低的情况，可是加上绝缘皮后就出现了负值的温度点。不知道是什么原因，有人说是网格不够细致，可是我细化了网格后还是不行，不知道是不是边界加的有问题。绝缘皮用加边界条件么，不知道怎么修改了。请求给位ansys高手的帮助，感激不尽~程序FINISH/CONFIG,NRES,100000/PREP7ET,1,SOLID69MP,DENS,1,8900MPTEMP,,,,,,,,MPTEMP,1,20,127,327,527,827,1027MPTEMP,7,1083,1127,1227,1527MPDATA,RSVX,1,1,1.678E-8,2.402E-8,3.792E-8,5.262E-8,7.551E-8,9.101E-8MPDATA,RSVX,1,7,12.237E-8 ,13.147E-8,14.613E-8,19.414E-8MPTEMP,,,,,,,,MPTEMP,1,20,100,300,500,900,1083MPTEMP,7,1200,1500,1800,2200,2700,3000MPDATA,C,1,1,380,394,410,428,474,520MPDATA,C,1,7,533,545,556,575,598,612MPTEMP,,,,,,,,MPTEMP,1,20,77,127,227,327,527MPTEMP,7,727,927MPDATA,KXX,1,1,403,396,393,386,379,366MPDATA,KXX,1,7,352,339MPTEMP,,,,,,,,MPTEMP,1,20,1072,1084,1200,1600,2000MPTEMP,7,2586,2596,2900MPDATA,ENTH,1,1,0,3.5579E9,2.5329E10,2.358E11,9.6149E11,1.687E12MPDATA,ENTH,1,7,2.725E12,3.149E12,3.165E12 MP,DENS,2,1870MP,RSVX,2,0.0000012MP,KXX,2,400MPTEMP,,,,,,,,MPTEMP,1,20,100,300,500,900,1200MPTEMP,7,1800,2100,2300,2500,2700,3000MPDATA,C,2,1,645,1020,1323,1604,1901,2010 MPDATA,C,2,7,2152,2211,2248,2290,2338,2401ET,2,SOLID90MP,DENS,3,1380MP,KXX,3,100MP,C,3,1580MP,RSVX,3,10E11建模/VIEW,1,1,1,1 /ANG,1/REP,FAST CYLIND,0.00089,0,0,0.025,0,360, wpoff,,,0.0245wpro,,,90.000000BLOCK,0.0005,,0.0005,,0.0032,,wpro,,,-90.000000 wpoff,0.0035,,-0.001CYLIND,0.00089,0,0,0.025,0,360,VSBV, 2, 1 VSBV,4,3CYLIND,0.00089, ,0,0.025,0,360, wpoff,-0.0035,,-0.0235CYLIND,0.00089, ,0,0.025,0,360, CYLIND,0.00169, 0.00089,0,0.023,0,360, wpoff,0.0035,,0.0255CYLIND,0.00169,0.00089 ,0,0.023,0,360, VGLUE,ALLNUMCMP,ALLVSEL,S,,,4VSEL,A,,,5VATT,1, ,1, 0 VSEL,S,,,1VATT,2, ,1,0 VSEL,S,,,2VSEL,A,,,3 VATT,3, ,2, 0 网格划分LSEL,S,,,1LSEL,A,,,2LSEL,A,,,5LSEL,A,,,7LSEL,A,,,63LSEL,A,,,65LESIZE,ALL,,,10LSEL,S,,,29LSEL,A,,,30LSEL,A,,,31LSEL,A,,,32LSEL,A,,,3LSEL,A,,,4LSEL,A,,,8LSEL,A,,,6LESIZE,ALL,,,3LSEL,S,,,62LSEL,A,,,64LESIZE,ALL,,,2LSEL,S,,,19LSEL,A,,,22LSEL,A,,,39LSEL,A,,,18LSEL,A,,,23LSEL,A,,,38LSEL,A,,,20LSEL,A,,,21LSEL,A,,,40LSEL,A,,,17LSEL,A,,,24LSEL,A,,,37LSEL,A,,,11LSEL,A,,,14LSEL,A,,,48LSEL,A,,,12LSEL,A,,,13LSEL,A,,,47LSEL,A,,,10LSEL,A,,,15LSEL,A,,,49LSEL,A,,,9LSEL,A,,,16LSEL,A,,,50LESIZE,ALL,,,8LSEL,S,,,27LSEL,A,,,28LSEL,A,,,33LSEL,A,,,34LSEL,A,,,26LSEL,A,,,35LSEL,A,,,25LSEL,A,,,36LSEL,A,,,45LSEL,A,,,52LSEL,A,,,46LSEL,A,,,51LSEL,A,,,44LSEL,A,,,53LSEL,A,,,43LSEL,A,,,54LESIZE,ALL,,,14LSEL,S,,,41LSEL,A,,,42LSEL,A,,,57LSEL,A,,,58LSEL,A,,,55LSEL,A,,,56LSEL,A,,,59LSEL,A,,,60LESIZE,ALL,,,57ALLSELVSWEEP,5,8,9VSWEEP,4,6,7VSWEEP,3,14,22VSWEEP,2,10,19VSWEEP,1,2,4求解计算/SOLUANTYPE,TRANSTIMINT,ONTUNIF,20AUTOTS,ONASEL,S, , , 7NSLA,S,1D,ALL,VOLT,0ASEL,S, , , 8NSLA,S,1CP,1,VOLT,ALL NI=NDNEXT(0)ALLSELT=1E-8 设置开始求解时间DL=600 电流有效值TZ=0.01 结束时间N=100 一个周期的步数F=50 频率PI=2*ASIN(1) 获得π值CON=1/F/N 设置时间步长NEQIT,1 设置时间步的迭代次数*CREATE,LOAD 创建宏设置载荷步TIME,T 设置载荷步时间I=DL*1.414*SIN(2*PI*F*T) 计算激励电流F,NI,AMPS,I 加载电流T=T+CON 时间递增SOLVE*END 结束宏命令*DO,I,1,TZ/CON+1 循环命令*USE,LOAD 执行宏 *ENDDO 结束循环命令FINISH /POST1SET,LASTPLNSOL,TEMP
页:
[1]