The Calculating Model of Structural Analysis for Jack-Up Rig Legs  

作　　者：Gu Guowei and Huang Youqing Senier Engineer, China Ofishore Oil Development & Engineering Corporation, (CNOOC), Zhanajiang 524057 China Offshore Oil Development & Engineering Corporation, (CNOOC), Zhanajiang 524057 

出　　处：《China Ocean Engineering》1993年第4期409-416,共8页中国海洋工程（英文版）

摘　　要：The selection or establishment of structural calculating model is a matter of primary importance in structural analysis. By analysing the irrationality of the calculating models used by some research organizations at home and abroad in structural analyses for truss jack-up rig legs, this paper introduces a new calculation model which is more reasonable. This model can simulate better the load situation of a rig reflecting more precisely the effects of the leg loads caused by the spring support of gearboxes of the jacking system and the secondary bending moment raised by hull displacement under extreme conditions. The rig conversion was completed in 1989. In July 1991 the rig safely stood the frontal hitting of Typhoon with the wind speed of 52 m / s, which shows that the checking on the structure is correct.- The selection or establishment of structural calculating model is a matter of primary importance in structural analysis. By analysing the irrationality of the calculating models used by some research organizations at home and abroad in structural analyses for truss jack-up rig legs, this paper introduces a new calculation model which is more reasonable. This model can simulate better the load situation of a rig reflecting more precisely the effects of the leg loads caused by the spring support of gearboxes of the jacking system and the secondary bending moment raised by hull displacement under extreme conditions. The rig conversion was completed in 1989. In July 1991 the rig safely stood the frontal hitting of Typhoon with the wind speed of 52 m / s, which shows that the checking on the structure is correct.

关 键 词：JACK-UP LEG CONVERSION calculating model PLATFORM 

分 类 号：P7[天文地球—海洋科学]