独立C型液化天然气液舱挡板的制荡性能研究  

Anti-sloshing performance of baffles in independent C-type liquefied natural gas tanks

作　　者：张林茂 林焰[1,2] ZHANG Linmao;LIN Yan(School of Naval Architecture and Ocean Engineering, Dalian University of Technology, Dalian 116024, China;State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China)

机构地区：[1]大连理工大学船舶工程学院,辽宁大连116024 [2]大连理工大学工业装备结构分析国家重点实验室,辽宁大连116024

出　　处：《哈尔滨工程大学学报》2022年第2期166-174,共9页Journal of Harbin Engineering University

基　　金：国家重点实验室专项基金项目(S18315).

摘　　要：为了分析制荡板结构、布置、通透率及液位高度对独立C型液化天然气液舱制性能的影响,本文在已有环型挡板研究的基础上,提出了X型、Y型、Slat型3类挡板设计。通过二维矩形舱和三维独立C型舱的晃荡模拟,验证了数值模型的准确性,根据3种液位下不同挡板制荡性能的数值预报,选出4种代表性挡板,并对挡板通透率进行了敏感性分析。研究表明:制荡板的安装可以显著降低C型舱所受冲击载荷和纵摇力矩,随着液位的增加,制荡效率先升高后降低,波幅抑制系数逐渐降低。相比于挡板型式,制荡效率和波幅抑制系数受液位高度和通透率的影响更加明显,4种代表性挡板的制荡性能由高到低依次为SlatB1型、YB1型、XB1型和RB型。Three types of baffles,i.e.,X-type,Y-type,and Slat-type,based on existing ring-type baffles,were used to analyze the influence of structure,arrangement,and permeability ratio of sloshing suppression baffles and liquid levels on the anti-sloshing performance of independent C-type liquefied natural gas(LNG)tanks.The accuracy of the numerical model was verified via sloshing simulations of a two-dimensional rectangular tank and a three-dimensional independent C-type LNG tank.Based on numerical predictions of the anti-sloshing performance of different baffles at three liquid levels,a sensitivity analysis of the permeability ratios of four representative baffles was performed.The analysis indicated that the installation of sloshing suppression baffles significantly reduced the impact load and pitch moment on C-type tanks.When liquid levels were increased,the anti-sloshing efficiency first increased and then decreased,and the wave amplitude suppression coefficient gradually decreased.The influence of liquid levels and permeability ratios on anti-sloshing efficiencies and wave amplitude suppression coefficients were more obvious compared with baffle structure.The order of anti-sloshing performance of four representative baffles from high to low was determined to be SlatB1,YB1,XB1,and RB.

关 键 词：独立C型液化天然气液舱 晃荡特性 制荡板 制荡效率 敏感性分析 纵摇激励 波幅抑制系数 液位高度 通透率 

分 类 号：U661.1[交通运输工程—船舶及航道工程]