Calculation method for pressure simulation of independent C-type LNG fuel tank

The invention discloses an independent C-type LNG fuel tank pressure simulation calculation method, and relates to the technical field of ship and ocean engineering, and the method comprises the following steps: S1, pressure simulation calculation data preprocessing, including LNG fuel characteristic data interpolation calculation, BOG consumption statistics and LNG pipeline data processing; s2, calculating heat leakage of the LNG fuel tank and the pipeline, including calculation of a heat leakage coefficient, selection of a heat leakage area and heat leakage calculation; s3, establishing a liquid-gas two-phase interactive calculation model of the LNG fuel tank, and dynamically analyzing the liquid-gas phase state in the LNG fuel tank based on assumed conditions; and S4, setting a time step length, repeating the steps S2-S3, and calculating temperature and pressure changes of the LNG fuel tank under the condition of LNG consumption. In combination with actual LNG consumption in the ship operation process, an