摘要
对于大型油罐的下节点计算,目前有三种方法,即API(J.B.Denham)的刚性地基梁方法、中国科学院力学所方法和吴天云的弹性地基梁与刚性地基梁耦合法。对这三种计算方法进行了分析,认为第3种方法适用于边缘板有足够宽度或边缘板与中幅板对接焊接情况。用本计算方法和秦皇岛10×1O^4m^3浮顶油罐的实测结果进行了比较,其理论计算结果与实测结果吻合很好,而前两种计算方法的误差都较明显。得出的结论是:①适当增大罐底边缘板伸出罐壁外表面的宽度,以减小罐底边缘板所承受的弯曲应力;②边缘板和中幅板应对接焊接,以减小边缘板的最大应力;③在下节点的计算方法中,应对罐壁变形给予考虑。
Three methods are ayailable for the calculation of lower nodal point of large oil tank,they are the method of rigid foundation beam by APKJ. B. Denham) ,the method by the Mechanics Department of Chinese Academy of Sciences,and the method by the authors of the article,which couples elastic foundation beam with rigid foundation beam. Analysis made on the three methods indicatesthat the authors' method is suitable for the cases that annular plates have adequate length and the annular and intermediate plates are butt welded. The results obtained by using this method and that actually measured en the 100 000 m3 floating roof tank in Qinhuangdao are compared,and a due conformation is real zed between the theoretical and actual measurement . In contrast , consi derable errors are found in the other two methods. The paper concludes that (1) the width of the annular plates extending beyond shell plates shall be dully increased so as to minimize the bending stress on annular plates: (2) the annular and intermediate plates shall be butt welded to reduce the maximum stress of annu ar plates;and (3) tank wall deformation shall be considered in the calculation method for lower nodal point.
出处
《油气储运》
CAS
北大核心
1996年第9期26-29,共4页
Oil & Gas Storage and Transportation
关键词
油罐
计算方法
下节点
tank, calculation method, comparison
