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121100220

應(yīng)助: 0 (幼兒園)
金幣: 83.2
帖子: 9
在線: 3.1小時(shí)
蟲(chóng)號(hào): 15855106
注冊(cè): 2019-08-06
專(zhuān)業(yè): 高分子材料的加工與成型

[求助] ANSYS 生死單元加載時(shí)間問(wèn)題已有1人參與

求助論壇大神，小弟最近在做增材制造溫度場(chǎng)的仿真，用到ANSYS生死單元功能，在運(yùn)行過(guò)程中遇到一個(gè)關(guān)于加載時(shí)間的問(wèn)題。主要問(wèn)題就是在執(zhí)行*DO循環(huán)時(shí)一直報(bào)錯(cuò)“present time is equal or less than previous time”。自己實(shí)在找不到問(wèn)題在哪，懇請(qǐng)論壇大神出手相助，幫忙看一下問(wèn)題出在哪，小弟不勝感激。APDL代碼如下:

/CONFIG,NRES,40000
LTH_MD=0.06  ！模具長(zhǎng)度
LTH_E=0.001 ！單元長(zhǎng)度
NA=6             ！層數(shù)
THICC=0.000125 ！單層厚
THICK=0.01       ！模具厚度
THICA=THICC*NA  ！鋪層厚度
T_I=0.5             ！時(shí)間步
YXRZ=16          ！有效熱載長(zhǎng)度
DERTAX=5       ！鋪放步
hflux_cons=88541  ！熱流密度

/PREP7
ET,1,13,4
ET,1,13,4
！-----------------------------材料熱參數(shù)---------------------------------
MPTEMP,1,0,50,100,150,200,250$MPTEMP,7,300,350,400,600
MPDATA,DENS,1,1,1601,1598,1593,1586,1575,1563
MPDATA,DENS,1,7,1551,1537,1524,1472
MPDATA,C,1,1,800,930,1040,1260,1300,1400
MPDATA,C,1,7,1550,1650,1700,1900
MPDATA,KXX,1,1,3.5,4.6,5.1,5.9,5.9,6.1
MPDATA,KXX,1,7,6.7,6.8,7,7.8
MPDATA,KYY,1,1,0.42,0.52,0.6,0.7,0.7,0.7
MPDATA,KYY,1,7,0.75,0.68,0.65,0.53

MPTEMP,1,0,50,100,150,200,250,$MPTEMP,7,300,330,343,350,400,600
MPDATA,EX,1,1,128e9,128e9,128e9,128e9,128e9,128e9
MPDATA,EX,1,7,128e9,128e9,128e9,128e9,128e9,128e9
MPDATA,EY,1,1,11E9,11E9,11E9,11E9,11E9,11E9
MPDATA,EY,1,7,11E9,11E9,1E-6,1E-6,1E-6,1E-6
MPDATA,EZ,1,1,11E9,11E9,11E9,11E9,11E9,11E9
MPDATA,EZ,1,7,11E9,11E9,11E9,11E9,11E9,11E9
MPDATA,NUXY,1,1,0.28,0.28,0.28,0.28,0.28,0.28
MPDATA,NUXY,1,7,0.28,0.28,1E-9,1E-9,1E-9,1E-9,1E-9
MPDATA,NUXZ,1,1,1E-9,1E-9,1E-9,1E-9,1E-9,1E-9
MPDATA,NUXZ,1,7,1E-9,1E-9,1E-9,1E-9,1E-9,1E-9
MPDATA,NUYZ,1,1,1E-9,1E-9,1E-9,1E-9,1E-9,1E-9
MPDATA,NUYZ,1,7,1E-9,1E-9,1E-9,1E-9,1E-9,1E-9
MPDATA,GXY,1,1,5.1E9,5.1E9,5.1E9,5.1E9,5.1E9,5.1E9
MPDATA,GXY,1,7,5.1E9,5.1E9,5.1E9,5.1E9,5.1E9,5.1E9

MPTEMP,1,0,50,100,140,143,250
MPTEMP,7,300,330,343,350,400,600
MPDATA,ALPX,1,1,0.6E-6,0.6E-6,0.6E-6,0.6E-6,0.6E-6,0.6E-6
MPDATA,ALPX,1,7,0.6E-6,0.6E-6,0.6E-6,0.6E-6,0.6E-6,0.6E-6
MPDATA,ALPY,1,1,34.3E-6,34.3E-6,34.3E-6,34.3E-6,66.0E-6,66.0E-6
MPDATA,ALPY,1,7,66.0E-6,66.0E-6,1E-30,1E-30,1E-30,1E-30

MPTEMP,1,0,50,100,150,200,250
MPTEMP,7,300,330,343,350,400,600
MPDATA,ENTH,1,1,0.00E+00,7.43E+07,1.57E+08,2.57E+08,3.59E+08,4.69E+08
MPDATA,ENTH,1,7,5.89E+08,6.63E+08,7.31E+08,7.48E+08,8.78E+08,1.44E+09

MP,EX,2.73E9
MP,NUXY,2,0.3
MP,ALPX,2,23E-6
MP,KXX,2,237
MP,C,2,905
MP,DENS,2,2700
！---------------幾何模型--------------------------
BLC4,0,THICK,LTH_MD,THICA
BLC4,0,0,LTH_MD,0.01
AGLUE,ALL
  ！---------------------------劃分網(wǎng)格-------------------------
LSEL,S,LINE,,1,5,2
LESIZE,ALL,,,60,,,,,1
LSEL,S,LINE,,2,4,2
LESIZE,ALL,,,6,,,,,1
LSEL,S,LINE,,9,10,1
LESIZE,ALL,,,10,5,,,,1
ASEL,S,AREA,,1
AATT,1,,1,0
MAT,1
AMESH,ALL
ASEL,S,AREA,,3
AATT,2,,1,0
MAT,2
AMESH,ALL$FINISH

！----------------------加載-------------------------------------
/sol
ANTYPE,TRANS
AUTOTS,1
TINTP,0.005,,,1,,,
LNSRCH,1
TRNOPT,FULL
TIMINT,ON
TUNIF,20
NROPT,FULL
ESEL,S,ELEM,,1,(LTH_MD/LTH_E)*NA,1
EKILL,ALL
NSLE,S
D,ALL,,20,,,,TEMP
TIME,T_I
NSUBST,10
LSEL,S,LINE,,5
SFL,ALL,CONV,13,,25
LSEL,S,LINE,,9,10,1
SFL,ALL,CONV,13,,25
ESEL,S,ELEM,,1,DERTAX,1
EALIVE,ALL
NSLE,S
DDELE,ALL
SFE,ALL,,CONV,2,hflux_cons
ALLSEL
EQSLV,ICCG
SOLVE
FINISH

/sol
ANTYPE,,REST
T=T_I*2
TIME,T
NSUBST,10
AUTOTS,1
TINTP,0.005,,,1,,,
LNSRCH,1
ESEL,S,ELEM,,1,DERTAX*2,1
EALIVE,ALL
NSLE,S
DDELE,ALL
SFE,ALL,,CONV,2,hflux_cons
ALLSEL
OUTRES,ALL,ALL
EQSLV,ICCG
SOLVE
T=T+T_I
FINISH

/sol
ANTYPE,,REST
*DO,I,YXRZ+DERTAX,(LTH_MD/LTH_E),DERTAX
TIME,T
NSUBST,10
AUTOTS,1
TINTP,0.005,,,1,,,
LNSRCH,1
ESEL,S,ELEM,,I-DERTAX+1,I,1
EALIVE,ALL
NSLE,S
DDELE,ALL
SFE,ALL,,CONV,2,hflux_cons
ESEL,S,ELEM,,I-(YXRZ+DERTAX)+1,I-YXRZ,1
SFE,ALL,,CONV,,13
SFE,ALL,,CONV,2,25
ALLSEL
OUTRES,ALL,ALL
EQSLV,ICCG
SOLVE
T=T+T_I
*ENDDO
FINISH@wuming524

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1樓 2020-05-12 20:39:22

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121100220

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您好，非常感謝您回復(fù)。因?yàn)槲蚁肽M熱載荷不斷移動(dòng)的瞬態(tài)過(guò)程，所以設(shè)置了重啟動(dòng)。按照您說(shuō)的我把重啟動(dòng)刪掉之后程序可以運(yùn)行，但是熱載荷并沒(méi)有加上去

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3樓2020-05-13 10:36:42

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877433020

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【答案】應(yīng)助回帖

感謝參與，應(yīng)助指數(shù) +1

ANTYPE,,REST，這個(gè)重啟動(dòng)設(shè)置的有問(wèn)題，我把你的重啟動(dòng)設(shè)置刪掉以后，可以運(yùn)行，不知道樓主為什么要用重啟動(dòng)？？

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2樓2020-05-12 21:52:27

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121100220

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引用回帖:

2樓: Originally posted by 877433020 at 2020-05-12 21:52:27
ANTYPE,,REST，這個(gè)重啟動(dòng)設(shè)置的有問(wèn)題，我把你的重啟動(dòng)設(shè)置刪掉以后，可以運(yùn)行，不知道樓主為什么要用重啟動(dòng)？？

贊一下

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4樓2020-05-13 10:37:26

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877433020

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引用回帖:

4樓: Originally posted by 121100220 at 2020-05-13 10:37:26
您好，非常感謝您回復(fù)。因?yàn)槲蚁肽M熱載荷不斷移動(dòng)的瞬態(tài)過(guò)程，所以設(shè)置了重啟動(dòng)。按照您說(shuō)的我把重啟動(dòng)刪掉之后程序可以運(yùn)行，但是熱載荷并沒(méi)有加上去...

建議移動(dòng)熱源用*do循環(huán)不斷選取節(jié)點(diǎn)來(lái)做，或者用函數(shù)編輯器。restart一般不這么用

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5樓2020-05-13 11:13:51

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