摘要
文章建立了基于特殊函数展开的半解析法数值模型,对单排有限长直立圆柱阵列的水动力问题进行了研究,发现其水动力曲线中激振力尖峰左侧存在明显的波动现象,忽视这一特征将影响结构疲劳分析的可靠性。研究结果表明,水动力曲线中的波动特性与直径-柱间距之比a/d无关,而与圆柱总数N、圆柱位置K及入射波的入射角度β有关。并针对入射角度β=0的情况,推导了水动力曲线波动区域相邻波峰间波数间距的预测公式,建立了波峰间距与圆柱总数和圆柱位置的关系。
A semi-analytical numerical model based on special functions expansion was established to study the hydrodynamic problems of a single-row cylindrical.A fluctuation existed at the left of force peaks in the hydrodynamic curve for these cylinders in waves.Neglecting this feature would affect the reliability of structural fatigue analysis.The results showed the fluctuation of the hydrodynamic curve was independent of the ratio of diameter to spacing:a/d.However it was related to the total number of columns:N,the position of cylinder:K and the incident wave angle:β.A prediction formula of the distance of adjacent peaks of the hydrodynamic curve fluctuation region was proposed for the case ofβ=0 to established the relationship of adjacent peak distance,number of cylinders and position of the cylinder.
作者
张华庆
王广原
马朝阳
刘文龙
ZHANG Hua-qing;WANG Guang-yuan;MA Zhao-yang;LIU Wen-long(Tianjin Research Institute for Water Transport Engineering,National Engineering Laboratory for Port Hydraulic Construction Technology,Tianjin 300456,China;Tianjin Survey and Design Institute for Water Transport Engineering,Tianjin Key Laboratory of Surveying and Mapping for Waterway Transport Engineering,Tianjin 300456,China)
出处
《水道港口》
2019年第5期511-517,共7页
Journal of Waterway and Harbor
基金
国家重点研发计划(2016YFC0802204-1)
天津市科技计划项目(18YFZCSF00490)
交通运输部天津水运工程科学研究所基金项目(TKS180407)
关键词
圆柱阵列
波浪
波动
预测公式
an array of cylinders
waves
fluctuation
prediction formula
