日本語フィールド
著者：萩原 世也;宮崎 則幸;中垣 通彦題名：衝撃的内圧を受ける円すい屋根式軸対称殻の有限要素法による分岐座屈解析発表情報：日本機械学会論文集. A編 巻: 63 号: 616 ページ: 2518 - 2525キーワード：概要：Conical roof shells which have a joint between a conical roof and an attached cylinder are utilized as oil storage tanks and some containment vessels. It is known that conical roof shells and torispherical shells subjected to static internal pressure buckle with circumferential waves caused by bifurcation buckling. We reported the dynamic analysis for bifurcation bucking of a torispherical shell under dynamic internal pressure under accident conditions. For torispherical shells, the dynamic pressure of bifurcation buckling was lower than the static pressure. It seems that conical roof shells buckle more easily at the joint than torispherical shells. A short time but overpressure loading due to, for example an explosion, may cause bifurcation buckling of the shell. For disign oil storage tanks, the ability of the tank to withstand high bifurcation pressure is not necessarily safe for explosion accident. Therefore, it is important to obtain the bifurcation buckling load from the dynamic analysis in the design of conical roof shells. In this paper, we calculate the bifurcation buckling pressure for dynamic pressure under accident conditions, that is, step pressure loading, ramp pressure loadings and pulse pressure loadings.抄録：英語フィールド
Author：HAGIHARA Seiya;MIYAZAKI Noriyuki;NAKAGAKI MichihikoTitle：Bifurcation Buckling Analysis of Conical Roof Shell Subjected to Dynamic Internal Pressure Using Finite Element MethodAnnouncement information:Transactions of the Japan Society of Mechanical Engineers Series B Vol: 63 Issue: 616 Page: 2518 - 2525An abstract：Conical roof shells which have a joint between a conical roof and an attached cylinder are utilized as oil storage tanks and some containment vessels. It is known that conical roof shells and torispherical shells subjected to static internal pressure buckle with circumferential waves caused by bifurcation buckling. We reported the dynamic analysis for bifurcation bucking of a torispherical shell under dynamic internal pressure under accident conditions. For torispherical shells, the dynamic pressure of bifurcation buckling was lower than the static pressure. It seems that conical roof shells buckle more easily at the joint than torispherical shells. A short time but overpressure loading due to, for example an explosion, may cause bifurcation buckling of the shell. For disign oil storage tanks, the ability of the tank to withstand high bifurcation pressure is not necessarily safe for explosion accident. Therefore, it is important to obtain the bifurcation buckling load from the dynamic analysis in the design of conical roof shells. In this paper, we calculate the bifurcation buckling pressure for dynamic pressure under accident conditions, that is, step pressure loading, ramp pressure loadings and pulse pressure loadings.