Estimation of Springing Response for 550 000 DWT Ore Carrier

The desire to benefit from economy of scale is one of the major driving forces behind the continuous growth in ship sizes. However, models of new large ships need to be thoroughly investigated to determine the carrier's response in waves. In this work, experimental and numerical assessments of the motion and load response of a 550,000 DWT ore carrier are performed using prototype ships with softer stiffness, and towing tank tests are conducted using a segmented model with two schemes of softer stiffness. Numerical analyses are performed employing both rigid body and linear hydroelasticity theories using an in-house program and a comparison is then made between experimental and numerical results to establish the influence of stiffness on the ore carrier's springing response. Results show that softer stiffness models can be used when studying the springing response of ships in waves.

实际海浪环境中大尺度自航船模的水弹性与耐波性试验研究（英文）

目的:为研究船舶在实际海浪环境中的水弹性与耐波性,本文提出一种新型模型试验技术。将相同船型不同尺度的模型分别在近海环境和水池环境中测量的试验数据进行比较,分析两种试验方法所得结果的差异,以说明水池模型试验方法所存在的问题,从而进一步证明新型试验技术的优越性。创新点:1.提出大尺度自航模型在实际海浪环境中实施水动力试验的技术和方法;2.将大尺度模型试验结果与传统水池模型试验结果进行比较,分析二者的差异。方法:针对某母型船,分别建造缩尺比为1:25和1:50的大尺度模型和小尺度模型。大尺度模型在自然海域的三维海浪中进行试验测量,而小尺度模型在水池长峰不规则波中进行试验测量。测量过程中保证两者的控制参数相似,并分析试验结果存在的差异。将数值计算的结果与大尺度模型试验的结果进行比较,并基于数值计算分析海浪的方向分布函数对结果的影响。结论:在近海海域中开展的大尺度模型耐波性与波浪载荷试验表明,本文提出的试验测试系统和试验方案是可行的。大尺度模型试验是在自然海浪环境中进行的,比水池环境更接近实船的实际航行环境,所得数据对于船舶设计和研发具有更高的参考价值和意义。