耙吸挖泥船抽舱最佳流速计算方法研究

Calculation method of the optimal flow rate for the emptying-chamber of trailing suction dredger

耙吸挖泥船管道输送优化问题在以往的研究中大多以产量最大化为目标。随着船舶节能减排在行业内日趋严苛的要求,油耗或者说能耗越来越被疏浚企业关注和重视。文章针对耙吸挖泥船的抽舱过程,利用泥泵管道模型进行粒径估计。以临界流速作为限制条件,从产量最大化、能耗最小化、综合产量和能耗的3个角度计算了各自对应的最佳流速。在研究长江口的工况时,发现综合产量和能耗计算得到的最佳流速在不同浓度下稳定,可为施工提供参考。

The optimization problem of pipeline transportation for trailing suction dredgers has mostly focused on maximizing production in previous studies.With the increasingly stringent requirements for ship energy conservation and emission reduction in the industry,oil consumption or energy consumption is increasingly being paid attention and valued by dredging enterprises.This paper focuses on the suction process of a trailing suction dredger and uses a slurry pump pipeline model for particle size estimation.Taking the critical flow rate as the limiting condition,the corresponding optimal flow rates were calculated from three perspectives:maximizing production,minimizing energy consumption,and comprehensive production and energy consumption.In the study of the operating conditions of the Yangtze River estuary,it is found that the optimal flow rate calculated by comprehensive production and energy consumption is stable at different concentrations,which can provide reference for construction.