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姜呃呃新蟲 (小有名氣)
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[交流]
單元類型
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求助大神:用solid90熱分析求解,用solid186結(jié)構(gòu)分析求解。進(jìn)行單元類型轉(zhuǎn)換時(shí)出現(xiàn)錯誤說“solid186沒有溫度自由度,所以etchg tts命令忽略了solid186”.進(jìn)行結(jié)構(gòu)分析要啥溫度自由度?還有要是我選擇的單元本來就有溫度與X Y Z自由度就不用進(jìn)行單元類型轉(zhuǎn)換?例如plane13 solid5 發(fā)自小木蟲Android客戶端 |
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新蟲 (小有名氣)
送紅花一朵 |
對流換熱系數(shù)也要刪掉么?我只是刪掉了ddele,all,temp沒有進(jìn)行sfdele。電腦只是進(jìn)行了警告elements of type solid186 do not have a temperature degree of freedom so the etchg tts command ignoees them.還有一個問題就是熱分析結(jié)束后沒有rth文件,我百度大家說用rst 文件也可以,我的rst文件我用list result打開里面是有結(jié)果的,但是我在ldread的時(shí)候說我的.rst文件 is not available. 謝謝!!! 發(fā)自小木蟲Android客戶端 |
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專家經(jīng)驗(yàn): +809 |
新蟲 (小有名氣)
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finish /clear /title,'thermal spraying 20171212' /prep7 /unit,si et,1,solid90 et,2,solid186 mptemp,1,0,300,600,1000,1300,2000 mpdata,dens,1,1,7859,7770,7659,7600,6750 ,6750 mpdata,dens,2,1,7859,7770,7659,7600,6750 ,6750.001 mpdata,c,1,1,450,514,967,1370,2800,2000 mpdata,c,2,1,450,514,967,1370,2800,2000.001 mpdata,kxx,1,1,67,53,39,31,20,20 mpdata,kxx,2,1,67,53,39,31,20,20.001 csys,0 block,0,0.1,0,0.02,0,0.01 block,0,0.1,0,0.02,0.01,0.012 vglue,all nummrg,all numcmp,all type,1 mat,2 esize,0.005 vmesh,2 type,1 mat,1 esize,0.005 vmesh,1 eplot finish /solu autots,on cnvtol,heat,,,,-1 outpr,all,all outres,all,all kbc,1 antype,trans timint,off nsubst,4 nsel,all d,all,temp,20 time,0.01 solve esel,s,mat,,2 ekill,all esel,all time,0.02 timint,on,therm tintp,,,,1.0 ddele,all,temp alls asel,a,,,3,5,1 nsla,s sf,all,conv,30,20 t=0 time=0.02 esel,s,live eplot *do,j,1,2 *do,i,1,20 ddele,all,temp t=t+1 esel,s,elem,,t ealive,all nsle d,all,temp,100 esel,s,live eplot alls time=time+0.1 nsubst,2,10,1 lnsrch,on time,time solve *enddo t=t+20 *do,p,1,20 ddele,all,temp esel,s,elem,,t ealive,all nsle d,all,temp,100 esel,s,live eplot alls t=t-1 time=time+0.1 nsubst,2,10,1 lnsrch,on time,time solve *enddo t=t+20 time=time+1 time,time nsubst,1 solve *enddo time=time+3600 time,time ddele,all,temp nsubst,10 allsel,all solve sfdele,all,conv save finish /prep7 etchg,tts mptemp mptemp,1,0,300,600,1000,1300,1400,2000 mpdata,ex,1,1,2e11,1.86e11,1.35e11,2e10,2e7,2e7,2e7 mpdata,ex,2,1,2e11,1.86e11,1.35e11,2e10,2e7,2e7,2.000001e7 mpdata,prxy,1,1,0.33,0.33,0.35,0.36,0.4,0.4 mpdata,prxy,2,1,0.33,0.33,0.35,0.36,0.4,0.400001 mpdata,alpx,1,1,12e-6,12.6e-6,13.0e-6,13.4e-6,13.7e-6,14e-6 mpdata,alpx,2,1,12e-6,12.6e-6,13.0e-6,13.4e-6,13.7e-6,14.0001e-6 mp,reft,1,20 mp,reft,2,100 tb,bkin,1,5 tbtemp,15 tbdata,1,280e6,2e9 tbtemp,800 tbdata,1,10e6,1e7 tbtemp,2500 tbdata,1,10e6,1e6 tbcopy,bkin,1,2 /solu asel,s,area,,1 nsla,s d,all,uz,0 antype,trans outpr,all,all outres,all,all kbc,0 autots,on time,0.02 esel,s,mat,,2 ekill,all allsel,all nsubst,1 solve t=0 time=0.02 *do,j,1,10 *do,i,1,20 ddele,all,temp t=t+1 esel,s,elem,,t ealive,all alls time=time+0.1 time,time ldread,temp,,,time,,,rst nsubst,2,10,1 lnsrch,on *enddo t=t+20 *do,p,1,20 ddele,all,temp esel,s,elem,,t ealive,all alls time=time+0.1 time,time ldread,temp,,,time,,,rst t=t-1 nsubst,2,10,1 lnsrch,on solve *enddo ddele,all,temp t=t+20 time=time+1 time,time ldread,temp,,,time,,,rst nsubst,1 solve *enddo time=time+3600 time,time ldread,temp,,,time,,,rst nsubst,10 allsel,all solve finish /post1 set,,,,,2.02 plnsol,temp plnsol,s,eqv |
新蟲 (小有名氣)
送紅花一朵 |
*** WARNING *** CP = 3.323 TIME= 12:22:10 There are no active degrees of freedom. *** WARNING *** CP = 58.781 TIME= 12:22:41 No constraints have been defined using the D command. 熱分析只出現(xiàn)這兩個警告 第一個是對所有單元節(jié)點(diǎn)施加初始溫度載荷20度時(shí)出現(xiàn)的,由于90只有一個溫度自由度,所以施加完初始溫度后就沒有自由度了,這個應(yīng)該不算錯吧 第二個是最后刪除所有溫度載荷時(shí)出現(xiàn)的 |
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你的命令流中至少有兩個問題: 1 熱分析部分同時(shí)定義了結(jié)構(gòu)單元 solid186,它是不包含溫度自由度的。 兩個警告信息可能都與此有關(guān)。 刪除在熱分析時(shí)定義 solid186 單元類型的命令,后面轉(zhuǎn)換求解類型時(shí),軟件會自動添加相應(yīng)的結(jié)構(gòu)單元類型的。 2 熱分析時(shí),定義初始溫度,應(yīng)該使用命令: TUNIF, 20,不能使用 D 命令,否則計(jì)算時(shí)溫度就不會改變了。 你的問題似乎很簡單,沒有必要采用間接解法,可以直接使用耦合場單元 solid226,采用直接方法,一次就可以完成熱和結(jié)構(gòu)的求解。 |
新蟲 (小有名氣)
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