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有限元結果強度評足

來(lái)源: 時(shí)間:2013-08-07 10:38:01 瀏覽次數:

按照JB4732-95(鋼制壓力容器—分析設計標準》培訓教材,實(shí)驗室反應釜首先選取了AB,BC兩條處理線(xiàn);在筒體、封頭相貫線(xiàn)上應力強度最大位置處,又選取了DE處理線(xiàn),應力處理線(xiàn)具體位置見(jiàn)圖8。表I給出分析設計應力失效機理及強度校核
按照JB4732-95(鋼制壓力容器—分析設計標準》培訓教材,實(shí)驗室反應釜首先選取了AB,BC兩條處理線(xiàn);在筒體、封頭相貫線(xiàn)上應力強度位置處,又選取了DE處理線(xiàn),應力處理線(xiàn)具體位置見(jiàn)圖8。表I給出分析設計應力失效機理及強度校核,并以此為依據對所選應力處理線(xiàn)進(jìn)行了應力評定??梢钥闯鏊O計的厚度不滿(mǎn)足強度要求,這說(shuō)明需要補強設計[。
頂蓋補強設計
前面的分析設計說(shuō)明,由于開(kāi)孔的原因,應力集中非常嚴重,導致強度不足,必須設法補強。滿(mǎn)足強度要求。從經(jīng)濟方面考慮,盡管實(shí)驗室反應釜 貼補強圈給制造帶來(lái)了一定的難度,但總體來(lái)說(shuō)貼補強圈比整體補強要經(jīng)濟。另外,由于反應釜外部所接管線(xiàn)比較多,特別是頂蓋上面,所以選擇了在內部貼0680mmx8iumm]的補強圈,并重新建模進(jìn)行了應力評定(方法同前),見(jiàn)表3,可見(jiàn)補強以后強度滿(mǎn)足要求。圖9給出貼補強圈以后接管、筒體與封頭相貫線(xiàn)的應力強度變化曲線(xiàn),其分布趨勢與沒(méi)有補強時(shí)的完全相同。
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