导管架拖航强度分析研究

Research for jacket transportation strength analysis

导管架在拖航过程中,驳船的六个自由度运动会使导管架产生相应的惯性力,拖航过程对导管架强度的影响可以通过重力及惯性力叠加作用来模拟。常规做法中,对导管架在重力及惯性力作用下的影响是同步完成的,计算中导管架拖航固定件会承受较大的重力竖向力,这与实际拖航过程中导管架重力竖向分力主要由垫堆承受不相符。介绍了一种导管架拖航强度分析的优化做法,将拖航分析中的重力加载和惯性力加载分别进行,在重力加载中,拖航固定件不起到支撑重力的作用,有效避免了上述问题。给出的分析方法对类似的结构物拖航强度分析具有一定的参考价值。

In the process of jacket transportation,the movement of six degrees of freedom of barge makes the jacket produce the corresponding inertial force.The influence of transportation process on the strength of the jacket can be simulated by superposition of the analysis results under the actions of gravity and inertial force.In the conventional practice,the influence on the jacket under the actions of gravity and inertial force is completed synchronously.In the calculation,the transportation fixator of the jacket will bear a large vertical force of gravity,which is inconsistent with the vertical separation force of the jacket gravity mainly borne by sea-fastening in the actual transportation process.This paper introduces an optimization method of transportation strength analysis of jacket.Gravity loading and inertial force loading in transportation analysis are carried out respectively.In gravity loading,transportation fixator does not play the role of supporting gravity,the problems mentioned above are effectively avoided.The analysis method of this paper has certain reference value for the transportation strength analysis of similar structures.