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恶劣海况大型舰船垂向加速度颤振响应分析

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针对遭遇恶劣海况时,艏部颤振现象明显、高频且持续的砰击加速度容易引起人员恐慌、影响设备使用和系留等问题,采用非线性时域水弹性方法预报船体运动和剖面垂向加速度,与自航模试验对比验证,通过提取艏部砰击合力和艏剖面垂向加速度响应,研究颤振加速度与艏部砰击力的关联,并改变波长、波高、航速和吃水进行参数敏感度分析.砰击加速度主要由艏部大面积底板砰击引起,随波高增大,颤振响应非线性程度显著加剧.除采取有利航线外,高海况中舰船可考虑主动失速,或预先增大压载来降低船体颤振响应.
Slamming Response of Vertical Acceleration for Large Ships in Rough Sea
In rough sea,the fore ship flutter phenomenon is obvious.The continuous slamming acceleration is easy to cause panic,which will also affect equipment function and cause lashing problems.A nonlinear time-domain hydro-elastic method is used to predict the vertical acceleration of a large ship,and the results are compared with its model test.The phase differences of high and low frequency components are analyzed,and the correlation between the fore-ship acceleration response and bow impact resultant force is studied.Finally,the sensitivity analysis of the parameters affecting fore-ship acceleration is carried out by changing wavelength,wave height,ship speed and draft respectively.In addition to taking favorable routes,ships in rough sea conditions can consider active stall or pre-increase ballast to reduce hull flutter response.

large shipvertical slamming accelerationresponse character

曲雪、郭浩、董森、邹健

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中国船舶及海洋工程设计研究院,上海 200011

大型舰船设计 砰击颤振加速度 响应特性

2024

船舶工程
中国造船工程学会

船舶工程

CSTPCD北大核心
影响因子:0.406
ISSN:1000-6982
年,卷(期):2024.46(3)
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