1)高(gao)低溫(wen)環(huan)境(jing)(jing)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)箱(xiang)體(ti)的(de)(de)(de)內(nei)框(kuang)架(jia)在試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)系統(tong)(tong)運行時需(xu)要(yao)(yao)經歷高(gao)低溫(wen)交變(bian)環(huan)境(jing)(jing)引起的(de)(de)(de)熱(re)變(bian)形沖(chong)擊(ji)，同(tong)時需(xu)要(yao)(yao)承擔試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)設(she)(she)(she)備的(de)(de)(de)各種機械載荷，工(gong)作(zuo)條件復雜。試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)箱(xiang)體(ti)內(nei)框(kuang)架(jia)直接暴露(lu)在試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)環(huan)境(jing)(jing)中，為了(le)減(jian)少(shao)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)系統(tong)(tong)的(de)(de)(de)運行費用，內(nei)框(kuang)架(jia)需(xu)盡量輕(qing)量化以(yi)減(jian)少(shao)自(zi)身熱(re)容。內(nei)框(kuang)架(jia)的(de)(de)(de)設(she)(she)(she)計對高(gao)低溫(wen)環(huan)境(jing)(jing)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)箱(xiang)體(ti)的(de)(de)(de)構(gou)(gou)(gou)建至關重要(yao)(yao)，需(xu)對內(nei)框(kuang)架(jia)進(jin)行熱(re)-結構(gou)(gou)(gou)優(you)化設(she)(she)(she)計，以(yi)滿足輕(qing)量化、強度剛度高(gao)、熱(re)疲勞性好的(de)(de)(de)設(she)(she)(she)計要(yao)(yao)求。此外(wai)，試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)箱(xiang)體(ti)內(nei)頂部、地面(mian)均(jun)(jun)設(she)(she)(she)有(you)靜(jing)壓室，對進(jin)口氣體(ti)進(jin)行預(yu)混，以(yi)保證箱(xiang)體(ti)內(nei)氣體(ti)環(huan)境(jing)(jing)的(de)(de)(de)均(jun)(jun)勻性。其中，下(xia)靜(jing)壓室鋪設(she)(she)(she)在工(gong)作(zuo)地面(mian)下(xia)方，不(bu)僅需(xu)要(yao)(yao)保證地面(mian)具有(you)一定(ding)的(de)(de)(de)強度支撐(cheng)地面(mian)試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)設(she)(she)(she)備，還需(xu)使地面(mian)的(de)(de)(de)氣體(ti)通過性能滿足系統(tong)(tong)要(yao)(yao)求。同(tong)時，下(xia)靜(jing)壓室內(nei)部在試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)工(gong)作(zuo)中容易(yi)堆(dui)積(ji)粉塵、雜質等(deng)污染物(wu)，且(qie)污染物(wu)容易(yi)在試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)過程中，上揚，進(jin)而對試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)設(she)(she)(she)備造成不(bu)良影(ying)響，所以(yi)下(xia)靜(jing)壓室的(de)(de)(de)結構(gou)(gou)(gou)設(she)(she)(she)計必須滿足結構(gou)(gou)(gou)簡單，質量輕(qing)便，容易(yi)清潔的(de)(de)(de)特點。因此，下(xia)靜(jing)壓室的(de)(de)(de)設(she)(she)(she)計及性能分(fen)析也(ye)是試(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)(yan)(yan)箱(xiang)體(ti)設(she)(she)(she)計的(de)(de)(de)重點。