ansys 在體的某一表面同時(shí)加載 對(duì)流荷載和熱流密度的問題 高手求救!
/PREP7
ET,1,SOLID70! 熱分析單元選擇 type=1
ET,2,SURF152 !表面效應(yīng)單元type=2
KEYOPT,2,4,1! Exclude：keyopt(4)=1 指定表面效應(yīng)單元的K4=1,去掉邊中點(diǎn),成為四結(jié)點(diǎn)表面單元
KEYOPT,2,8,2
是這么做的,先對(duì)體進(jìn)行了網(wǎng)格劃分,然后在那一表面加上 表面熱效應(yīng)單元了
asel,s,10
AATT, 1, , 2, 0,!指定實(shí)體上表面用152號(hào)單元 mat=1 typ=2
MSHAPE,0,2D
MSHKEY,1
esize,
amesh,all
之后,選擇那個(gè)面上所有的表面熱效應(yīng)單元,施加對(duì)流載荷
asel,s,10
nsla,s,1
ESLN
ESEL,R,TYPE,2
SFE,ALL,CONV,10
然后在該面施加 熱流密度,
IC,ALL,TEMP,25,! 所有節(jié)點(diǎn)初始溫度設(shè)定
asel,s,10
nsla,s,1
ESLN
ESEL,R,TYPE,1
SFE,ALL,HFLUX,6000 !施加6000的熱流密度
TIME_STEP=100
ANTYPE,4  ! 設(shè)定瞬態(tài)計(jì)算
TRNOPT,FULL
LUMPM,0
OUTRES,ALL,LAST, ! 僅輸出最后子步結(jié)果
TIME,TIME_STEP! 計(jì)算終了時(shí)間
AUTOTS,1! 自動(dòng)步長(zhǎng)
NSUBST,1,2,1
TIMINT,1
TINTP,0.005, , ,-1,0.5,-1 ! 積分參數(shù)
KBC,1! 載荷階梯插值
TSRES,ERASE
allsel
SOLVE  ! 求解
FINISH
出現(xiàn)了些問題,
*** ERROR *** CP =24.359 TIME= 16:39:48
Bulk temperature is undefined for convection surface element 57121.
Use SFELIST or SFLIST command to find other elements without bulk
temperatures.
*** ERROR *** CP =24.422 TIME= 16:39:51
The step data was checked and there were errors found.
Please check output or errors file ( F:\work\我的程序\666.err ) for
messages.
表面效應(yīng)單元加載的是 對(duì)流載荷
表面其他單元加載的 是 熱流密度