海上风电安装平台正压型下浮体气密性研究

Study on airtightness of positive pressure mat self-elevating of offshore wind power installation platform

本文以3500型深水高效海上风电安装平台的下浮体结构为研究对象,基于Fluent进行气密性压降研究,为正压型下浮体的密封和保压控制提供理论基础。首先由基本理论推导气体泄漏一般方程,结合实际工况确定数学模型进行计算;然后通过Fluent仿真模拟对模型网格进行独立性检验,将仿真结果与计算结果进行相关性验证。最后对下浮体泄漏口数量和位置,以及内部结构对泄漏过程的影响进行探究。结果表明,仿真结果和计算结果相关性可达0.97以上;泄漏口数量为3个及以上时,压降过程基本不再受泄漏口数量影响;内部结构体积占比较小时,下浮体内部结构和泄漏口不同位置各组间压降数据RMSE值小于100,即压降过程可以视为一致。

In this paper,the mat self-elevating of type 3500 deepwater efficient offshore wind power installation platform is taken as the research object,and the air-tightness pressure drop is studied based on Fluent,which provides a theoretical basis for the sealing and pressure holding control of the positive pressure mat self-elevating.First by the gas leakage general equation derived from the basic theory,combined with the mathematical model to calculate the actual working condition,and then by the fluent software to simulate the simulation was carried out on the model grid independence test,the results of simulation and calculation result verifies the correlation between the final on mat self-elevating leakage quantity and location,and the internal structure to explore the effect of leak process.The results show that the correlation between simulation results and calculation results can reach more than 0.97,when the number of leakage ports is 3 or more,the pressure drop process is basically not affected by the number of leakage ports;when the volume proportion of internal structure is small,the RMSE value of pressure drop data between the internal structure of floating body and different positions of leakage outlet is less than 100,that is,the pressure drop process can be regarded as consistent.