ABSTRACT

To develop an equivalent device of the umbilical cable, in which the hydraulic transmission characteristics are the same as the real umbilical cable. Simulation and experimental methods were used to study the hydraulic transmission characteristics. Theoretical relations of hydraulic resistance, hydraulic capacitance, and hydraulic inductance were derived by using the similarity principle. Simulation results showed that by comparing the valve operational time and the subsea accumulator pressure characteristics of the umbilical cable and the equivalent umbilical cable, the equivalent umbilical cable model can simulate the true umbilical valve operation characteristics. Finally, the pressure relief in the absence of an actuator or in the presence of a single actuator, was achieved by using an umbilical equivalent device. The results indicated that the umbilical equivalent device could simulate the true umbilical hydraulic transmission characteristics, making it useful for replacing the true umbilical cable in the subsea product integrity tests.

摘要

开发等效的脐带缆装置，其液压传递特性与实际的脐带缆相同。通过仿真和实验方法研究了液压传动特性。利用相似原理推导了水力阻力，水力电容和水力电感的理论关系。仿真结果表明，通过比较阀门的工作时间以及脐带缆和等效脐带缆的海底蓄能器压力特性，等效脐带缆模型可以模拟真实的脐带阀门的运行特征。最后，通过使用脐带等效装置来实现在不存在致动器或存在单个致动器的情况下的压力释放。