| 基于脉冲响应函数法计算小尺度圆柱上的不规则波浪力 |
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| 引用本文： | 林子,滕斌,宁德志,时忠民.基于脉冲响应函数法计算小尺度圆柱上的不规则波浪力[J].水运工程,2011(2):11-15. |
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| 作者姓名： | 林子 滕斌 宁德志 时忠民 |
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| 作者单位： | 1. 大连理工大学,海岸和近海工程国家重点实验室,辽宁,大连,116024
2. 中海石油研究中心,北京,100027 |
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| 基金项目： | 国家自然科学基金，国家科技重大专项 |
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| 摘 要： | 通过对波动传递函数的逆傅里叶变换建立脉冲响应函数的解析表达式,在仅已知不规则波波面过程线的情况下,利用脉冲响应函数与已知波面序列的卷积求得不规则波的速度场,并计算不规则波浪序列引起的水质点速度、加速度。通过与线性波浪叠加法的对比验证了方法的正确性,并应用Morison方程计算小尺度圆柱上的不规则波浪力。对不规则波浪力进行频谱分析得到:在非线性较弱时,脉冲响应法求得的波浪力谱与线性谱分析法的波浪力谱较为接近。随着波浪非线性的增强,脉冲响应法求得的速度力谱与线性谱分析法相比峰值不断增大,在低频和高频处能量增多,在主要能量区的谱宽也不断增加,而惯性力谱与线性谱分析方法结果基本相同。
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| 关 键 词： | 不规则波 脉冲响应函数 Morison方程 波浪力 |
Irregular wave forces on small-diameter cylinder based on impulse response function method |
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| LIN Zi,TENG Bin,NING De-zhi,SHI Zhong-min.Irregular wave forces on small-diameter cylinder based on impulse response function method[J].Port & Waterway Engineering,2011(2):11-15. |
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| Authors: | LIN Zi TENG Bin NING De-zhi SHI Zhong-min |
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| Institution: | LIN Zi1,TENG Bin1,NING De-zhi1,SHI Zhong-min2(1.The State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024,China,2.Research Center,China National Offshore Oil Corporation,Beijing 100027,China) |
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| Abstract: | An analytical expression of the impulse response function was presented by the inverse Fourier Transform of the transfer function.The velocity of irregular waves was gained by calculating the convolution of the time history of wave and the impulse response function,for the case where only the wave time history of irregular waves was known.By a comparison with the superposition method of the linear irregular waves,the proposed approach was verified and the irregular wave forces were calculated by using Moris... |
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| Keywords: | irregular wave impulse response function Morison function wave force |
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