CAJ | 학술논문

利用 ADIAN 软件中的 Lanczos 特征值算法，以山东青岛市董家口一座16万 m3大型预应力混凝土储罐为研究对象，考虑液固耦合效应，对 LNG 储罐内外罐进行模态分析，比较了考虑液固耦合的理论计算结果与有限元计算的结果，证明了 ADINA內计算的正确性及有效性。对比分析外罐对罐液固耦合和液体晃动的影响。得出液固耦合作用下，配筋方式及预应力钢筋间距对大型 LNG 混凝土外罐的梁式振动频率的影响；外罐自振频率跟泄露液体深度的曲线关系；对于 LNG 储罐的优化设计提供了设计依据，对地震作用下储罐的动态分析提供数据，为研究 LNG 储罐的抗震设计具有明显的指导性意义。
이용 ADIAN 연건중적 Lanczos 특정치산법，이산동청도시동가구일좌16만 m3대형예응력혼응토저관위연구대상，고필액고우합효응，대 LNG 저관내외관진행모태분석，비교료고필액고우합적이론계산결과여유한원계산적결과，증명료 ADINA내계산적정학성급유효성。대비분석외관대관액고우합화액체황동적영향。득출액고우합작용하，배근방식급예응력강근간거대대형 LNG 혼응토외관적량식진동빈솔적영향；외관자진빈솔근설로액체심도적곡선관계；대우 LNG 저관적우화설계제공료설계의거，대지진작용하저관적동태분석제공수거，위연구 LNG 저관적항진설계구유명현적지도성의의。
Taking a 1.6×105 m3 large prestressed concrete tank in Dongjiakou, Qingdao, Shandong as the research object, Lanczos eigenvalue algorithm in ADIAN was used to carry out modal analysis of inner and outer tank of LNG storage tanks considering the liquid-solid coupling effect. The calculated result was compared with the result calculated by finite element method. The correctness and effectiveness of Lanczos eigenvalue algorithm in ADIAN were proved. Effects of outer tank on inner tank liquid-solid coupling and liquid sloshing were analyzed. The results show that, under liquid-solid coupling, reinforcement scheme and spacing of the prestressed tendon have effect on the beam vibration frequency of large LNG outer tank; outer tank natural vibration frequency has curve relationship with leaking liquid depth. This paper provides the design basis for the optimization design of LNG storage tank and data for dynamic analysis of the LNG storage tanks under earthquake, and has the guiding significance to the anti-seismic design of LNG storage tanks.