| 随机参数激励下船舶的横摇运动 |
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| 引用本文： | 何成慧,陈文良. 随机参数激励下船舶的横摇运动[J]. 中国造船, 1987, 0(1) |
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| 作者姓名： | 何成慧 陈文良 |
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| 作者单位： | 上海交通大学(何成慧)，上海交通大学(陈文良) |
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| 摘 要： | 本文用能量包线统计平均法研究船舶在随浪和斜浪作用下的横摇运动,适用于阻尼较小因而激励谱的带宽较之响应谐的带宽大得多的情况。通过解 FPK方程可得出能量包线的概率密度,进而计算出各种响应统计量。这一方法允许把激励谱的具体形式考虑进去,特别适用于有强非线性恢复力矩情况。
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SHIP ROLLING MOTION UNDER RANDOM PARAMETRIC EXCITATIONS |
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| He Chenghui Chen Wenliang. SHIP ROLLING MOTION UNDER RANDOM PARAMETRIC EXCITATIONS[J]. Shipbuilding of China, 1987, 0(1) |
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| Authors: | He Chenghui Chen Wenliang |
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| Affiliation: | Shanghai Jiao Tong University |
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| Abstract: | Rolling motion of ship in oblique or following seas is studied.Whendamping is light,correlation time of excitation is much less than that ofresponse.Then stochastic averaging energy envelope of response approxim-ately as one-dimensional Markov process.Transitional probabilistic densityof the envelope is obtained by solving FPK equation and certain statistic-al characteristics of interest can be further calculated.The method is conv-enient to take into account spectral properties of excitations and is espec-ially appropriate for rolling motion with strong nonlinear restoring mome-nts. |
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| Keywords: | Ship seakeeping rolling motion random parametric excitation stochastic averaging energy envelope method FPK equation calculation of strong nonlinear restoring moments |
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