物探船多缆作业阻力预报及推进冗余评价

Resistance Prediction and Propulsion Redundancy Evaluation for Multi-cable Operationof Geophysical Vessels

针对物探船多缆作业时拖带设备多、作业工况多变,并且在推进系统方面风险性较高的特点,提出了在缆数较多且工况复杂的作业之前进行阻力预报及推进冗余评价的必要性。并介绍了拖缆和拖体的阻力计算方法,通过将电缆和扩展器的阻力施加在模型连接点上以实现简化计算。此外,给出了在缺少试验数据的情况下进行推进冗余评价的方法。最后以物探船12缆作业为例进行了计算,结果满足实际工程应用要求。

Aiming at the characteristics of the big amount of towing equipment,variable working conditions and high risk in the propulsion system of the geophysical ship during multi-cable operation,It's necessary to carry out resistance prediction and propulsion redundant evaluation before the multi-cable operations in complex working conditions.And the resistance calculation method of the tow cables and the tow buoys are introduced.The simplified method of applying the resistance of cables and on connection points of the model is illustrated.In addition,a method for propulsion redundant evaluation in the absence of experimental data is presented.Finally,the calculation is carried out by taking the 12-cable operation of the geophysical ship as an example,and the results meet the requirements of practical engineering applications.