Development and validation of harmonic wave group single-run procedure for RAO with comparison to regular wave and transient wave group procedures using URANS
Development and validation of harmonic wave group single-run procedure for RAO with comparison to regular wave and transient wave group procedures using URANS
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DOI：
10.1016/j.oceaneng.2010.01.001
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发表时间：
2010-06
影响因子：
5
通讯作者：
S. M. Mousaviraad;P. Carrica;F. Stern
中科院分区：
文献类型：
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作者：
S. M. Mousaviraad;P. Carrica;F. Stern
使用非定常雷诺平均纳维-斯托克斯求解器开发、验证了谐波组单次耐波性程序，并与常规波和瞬态波组程序进行了比较，尽管所有程序也可以使用实验或势流来实现。 Incoming waves are generated by linear superposition of potential solution for a number of component waves.常规波浪程序需要多次运行，而单次运行程序以固定速度获取一系列频率的响应幅度算子（RAO），假设线性船舶响应。瞬态波群程序提供连续的RAO曲线，而谐波群程序无需聚焦即可获得离散的传递函数。 Results are presented for heave and pitch response amplitudes and phases for the DTMB model 5512 in head waves.对瞬态波组程序进行了验证和确认研究。验证以平均间隔 9.54 (%D) 实现。程序比较表明，谐波群程序效率最高，与常规波程序相比，计算量节省75.8%。所有过程的错误值都相似，均为 4 (%D)。谐波群结果在大范围的弗劳德数下得到了验证，得到了令人满意的结果。
A harmonic wave group single run seakeeping procedure is developed, validated and compared with regular wave and transient wave group procedures, using an unsteady Reynolds averaged Navier–Stokes solver, although all procedures can be also implemented using experiments or potential flow. Incoming waves are generated by linear superposition of potential solution for a number of component waves. The regular wave procedure requires multiple runs, whereas single run procedures obtain the response amplitude operators (RAO) for a range of frequencies at a fixed speed, assuming linear ship response. The transient wave group procedure provides continuous RAO curves, while the harmonic wave group procedure obtains discrete transfer functions without focusing. Results are presented for heave and pitch response amplitudes and phases for the DTMB model 5512 in head waves. Verification and validation studies are performed for the transient wave group procedure. Validation is achieved at the average interval of 9.54 (%D). Comparisons of the procedures show that the harmonic wave group procedure is the most efficient, saving 75.8% on the computational cost compared with the regular wave procedure. Error values from all procedures are similar at 4 (%D). Harmonic wave group results are validated for a wide range of the Froude numbers, with satisfactory results.