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121100220捐助贵宾 (初入文坛)
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[求助]
ANSYS 生死单元加载时间问题 已有1人参与
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求助论坛大神，小弟最近在做增材制造温度场的仿真，用到ANSYS生死单元功能，在运行过程中遇到一个关于加载时间的问题。主要问题就是在执行*DO循环时一直报错“present time is equal or less than previous time”。自己实在找不到问题在哪，恳请论坛大神出手相助，帮忙看一下问题出在哪，小弟不胜感激。APDL代码如下: /CONFIG,NRES,40000 LTH_MD=0.06 ！模具长度 LTH_E=0.001 ！单元长度 NA=6 ！层数 THICC=0.000125 ！单层厚 THICK=0.01 ！模具厚度 THICA=THICC*NA ！铺层厚度 T_I=0.5 ！ 时间步 YXRZ=16 ！有效热载长度 DERTAX=5 ！铺放步 hflux_cons=88541 ！热流密度 /PREP7 ET,1,13,4 ET,1,13,4 ！-----------------------------材料热参数--------------------------------- 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 ！---------------几何模型-------------------------- BLC4,0,THICK,LTH_MD,THICA BLC4,0,0,LTH_MD,0.01 AGLUE,ALL ！---------------------------划分网格------------------------- 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 ！----------------------加载------------------------------------- /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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121100220
捐助贵宾 (初入文坛)
- 应助: 0 (幼儿园)
- 金币: 83.2
- 帖子: 9
- 在线: 3.1小时
- 虫号: 15855106
- 注册: 2019-08-06
- 专业: 高分子材料的加工与成型
3楼2020-05-13 10:36:42
2楼2020-05-12 21:52:27
121100220
捐助贵宾 (初入文坛)
- 应助: 0 (幼儿园)
- 金币: 83.2
- 帖子: 9
- 在线: 3.1小时
- 虫号: 15855106
- 注册: 2019-08-06
- 专业: 高分子材料的加工与成型
4楼2020-05-13 10:37:26
5楼2020-05-13 11:13:51
