Unsteady effects during resistance tests on a ship model in a towing tank
Unsteady effects during resistance tests on a ship model in a towing tank
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拖曳水池中船模阻力测试过程中的不稳定效应
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
D. Clelland
中科院分区：
文献类型：
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作者：
L. Doctors;A. Day;D. Clelland
已知船模拖曳水箱阻力试验恒速阶段波浪阻力存在振荡。在这项工作中，非定常薄船阻力理论已应用于这种情况。结果与使用拖车获得的实验数据进行了比较，拖车的速度历史可以编程。这里证明理论和实验之间通常存在良好的相关性。特别是，我们可以预测弗劳德数、加速度和加速度平滑类型对振荡特性的影响。这些特性包括波阻与时间曲线中振荡的幅度、衰减率、频率和相位。
It is known that there are oscillations in the wave resistance during the constantvelocity phase of a towing-tank resistance test on a ship model. In this work, the unsteady thin-ship resistance theory has been applied to this case. The results have been compared with experiment data obtained using a towing carriage the velocity history of which can be programmed. It is demonstrated here that generally excellent correlation exists between the theory and the experiments. In particular, one can predict the influence of Froude number, rate of acceleration, and type of smoothing of the acceleration on the characteristics of the oscillations. These characteristics include the amplitude, rate of decay, frequency, and phasing of the oscillations in the curve of wave resistance versus time.