液压缸直接作用式隔水管张紧系统多学科仿真分析与研究

为了对液压缸直接作用式隔水管张紧系统样机设计方案进行原理验证,基于SimulationX多学科仿真软件构建了气液回路和多体机械系统的联动模型,分别在正常钻井作业、对称布置的两套张紧液压缸失效和隔水管紧急解脱3种工况模式下对张紧系统开展了动态响应分析研究。研究表明:在正常钻井作业工况下,张紧系统的中位张力、补偿精度、蓄能器气体压力达到设计目标,并满足规范标准的要求;对称布置的两套液压缸失效后,通过增加中位压力值,仍可保持足够的系统张力;在隔水管下部总成和防喷器组发生紧急解脱后,张紧液缸行程小于设计最大行程,活塞和缸体之间没有发生碰撞,蓄能器压力波动基本保持稳定。研究结果对于液压缸直接作用式隔水管张紧系统的研制具有重要的意义。

Multidisciplinary Simulation Analysis and Study for Direct Acting Riser Tensioner System

In order to verify the principle of the prototype design plan of the cylinder direct acting riser tensioner system, co simulation models of the pneumatic hydraulic circuit and multi body mechanical system are built based on the multidisciplinary simulation software SimulationX. The dynamic response analysis was carried out on the tensioning system under three working conditions of normal operation mode, two symmetrical arrangement hydraulic cylinders out of operation simultaneously and the emergency disconnection of the drilling riser. Simulating results show that: in normal drilling operation mode, the neutral position tension of the riser tensioner system, compensation accuracy and the gas pressure fluctuation of the accumulator achieve the design goal and meet the standards requirements. Once the failure of two cylinders occurred, enough tension of the system can be maintained by increasing the neutral position pressure. After the emergency disconnection of the riser, the stroke of the tension is less than the maximum design value, and there was no collision between the piston and the cylinder end stop throughout the heaving period. The gas pressure of the accumulator can maintain fairly steady fluctuations. The simulation results are of great significance for development and manufacturing of the hydraulic cylinder direct acting riser tensioner system.