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823978808新蟲(chóng) (初入文壇)
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[求助]
求助ansys溫度場(chǎng),附命令流
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本人需要研究制動(dòng)器摩擦溫度場(chǎng),思想如下: 將制動(dòng)時(shí)間等分成N等分,在每個(gè)時(shí)間段內(nèi),對(duì)模型一部分施加熱流密度,對(duì)其他面施加對(duì)流換熱,時(shí)間推移,移動(dòng)施加熱流密度位置,進(jìn)行多載荷步求解,得到全時(shí)間段溫度結(jié)果。 以下代碼是論證這個(gè)思想的實(shí)驗(yàn),有以下簡(jiǎn)化: 1. 對(duì)流換熱沒(méi)有對(duì)所有非接觸其他表面,只是選取部分,建成COMPONENT 2. 沒(méi)有細(xì)究時(shí)間段內(nèi)熱流密度施加的位置,只是簡(jiǎn)單移動(dòng)到相鄰位置 3. 為簡(jiǎn)化計(jì)算,總時(shí)間為10s,時(shí)間間隔選1s APDL如下: /prep7 et,1,solid70 mp,ex,1,175e3 mp,prxy,1,0.3 mp,dens,1,7.228e-9 mp,alpx,1,11e-6 uimp,1,reft,,,20 mp,kxx,1,48 mp,c,1,480e6 !------------------------ rb=1000/2 rs=148/2 b_disc=30 x_theo=435 length_pan=255/2 width_pan=120/2 b_pan=35 numcirc=18 rfmin=x_theo-width_pan rfmax=x_theo+width_pan numrad=12 incrad=(rfmax-rfmin)/numrad numrsmesh_b=6 numrfminmesh=5 numradmesh=20 *do,i,1,numcirc,1 cylind,rfmin,rs,0,b_disc,360*i/numcirc,360*(i+1)/numcirc *enddo !*do,i,1,numcirc,1 !*do,j,0,numrad-1,1 !cylind,rfmin+j*incrad,rfmin+(j+1)*incrad,0,b_disc,360*i/numcirc,360*(i+1)/numcirc !*enddo !*enddo *do,i,1,numcirc,1 cylind,rfmin,rfmax,0,b_disc,360*i/numcirc,360*(i+1)/numcirc *enddo *do,i,1,numcirc,1 cylind,rfmax,rb,0,b_disc,360*i/numcirc,360*(i+1)/numcirc *enddo allsel,all vglue,all numcmp,area FLST,5,18,4,ORDE,18 FITEM,5,5 FITEM,5,655 FITEM,5,659 FITEM,5,663 FITEM,5,667 FITEM,5,671 FITEM,5,675 FITEM,5,679 FITEM,5,683 FITEM,5,687 FITEM,5,691 FITEM,5,695 FITEM,5,699 FITEM,5,703 FITEM,5,707 FITEM,5,711 FITEM,5,715 FITEM,5,719 CM,_Y,LINE LSEL, , , ,P51X CM,_Y1,LINE CMSEL,,_Y !* LESIZE,_Y1, , ,6, , , , ,1 !* FLST,5,1,4,ORDE,1 FITEM,5,8 CM,_Y,LINE LSEL, , , ,P51X CM,_Y1,LINE CMSEL,,_Y !* LESIZE,_Y1, , ,10, , , , ,1 !* FLST,5,1,4,ORDE,1 FITEM,5,726 CM,_Y,LINE LSEL, , , ,P51X CM,_Y1,LINE CMSEL,,_Y !* LESIZE,_Y1, , ,5, , , , ,1 FLST,5,1,4,ORDE,1 FITEM,5,792 CM,_Y,LINE LSEL, , , ,P51X CM,_Y1,LINE CMSEL,,_Y !* LESIZE,_Y1, , ,1, , , , ,1 !* MSHAPE,1,3D MSHKEY,0 !* FLST,5,54,6,ORDE,3 FITEM,5,1 FITEM,5,55 FITEM,5,-107 CM,_Y,VOLU VSEL, , , ,P51X CM,_Y1,VOLU CHKMSH,'VOLU' CMSEL,S,_Y !* VSWEEP,_Y1 !* CMDELE,_Y CMDELE,_Y1 CMDELE,_Y2 !* !------------網(wǎng)分------ asel,s,,,2,4,2 asel,a,,,30,96,2 cm,area_conv,area asel,s,,,104,164,4 asel,a,,,26,167,141 cm,fzone_conv,area !---------- /sol tunif,20, /sol w0=1780 zt=10 dt=1 arad=w0/zt u=0.3 p=1.8 r=rfmax conve=10 !對(duì)流換熱系數(shù) convet=20 !參考溫度 subst1=10 numloop=18 *dim,t,array,10,,,,, *do,i,1,10 t(i)=dt*i *enddo *dim,w,array,10,,,,,, *do,i,1,10 w(i)=w0-arad*i*dt *enddo *dim,q,array,10,,,, *do,i,1,10 q(i)=u*p*w(i)*r *enddo !------------ /sol timint,on,therm tref,20 sfa,area_conv,1,conv,conve,convet !這句存疑,sfa命令能夠在多載荷步中一直存在嗎? !------- sfa,fzone_conv,1,conv,conve,convet sfa,26,1,hflux,q(1) time,dt kbc,1 nsubst,subst1 antype,4 trnopt,full toffset,273, outpr,all,all solve sfadele,area_conv,1,conv,conve,convet !------------------- *do,i,1,8 sfa,fzone_conv,1,conv,conve,convet sfa,104,1,hflux,q(i+1) j=104+4*i time,dt*(i+1) kbc,1 nsubst,subst1 antype,4 trnopt,full toffset,273, outpr,all,all solve sfadele,area_conv,1,conv,conve,convet *enddo !--------由于加載的表面由多個(gè)部分粘結(jié)而成, !--------編號(hào)不連續(xù)或呈等差關(guān)系, !--------所以不能只用一次循環(huán) sfa,fzone_conv,1,conv,conve,convet sfa,167,1,hflux,q(10) time,dt*10 kbc,1 nsubst,subst1 antype,4 trnopt,full toffset,273, outpr,all,all solve sfadele,area_conv,1,conv,conve,convet finish 有以下問(wèn)題: 1. 能夠運(yùn)算,但是結(jié)果顯示好像施加熱流密度的位置沒(méi)有移動(dòng) 2. 溫度出現(xiàn)負(fù)值 3. 看到論壇有好多溫度場(chǎng)模擬,請(qǐng)高手指教,望不吝給出命令流進(jìn)行參考! |
ANSYS命令流 |
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