报告题目：Hydrodynamic problems involving ice
报 告 人：Aleksandr Korobkin， Tatyana Khabakhpasheva
报告时间：2019年4月2日 8:30-11:30、14:30-17:30
报告地点：船海楼三楼大会议室（8:30-11：30），船海楼四楼418会议室（14：30-17：00）
报告人简介：Aleksandr Korobkin，英国东安格利亚大学数学学院教授、博导。1980年毕业与新西伯利亚大学应用数学与力学系，1985年获得俄罗斯拉夫兰提耶夫流体动力学研究所流体力学方向哲学博士，1995年获得俄罗斯科学院理工博士学位。1980-2007年间年在俄罗斯拉夫兰提耶夫流体动力学研究所工作，2007年被聘为英国东安格利亚大学数学学院教授。他在流体与结构物相互作用方面取得了非凡的成就，得到国际社会的广泛认可，于2009年获得了著名的船舶流体力学最高奖项“温布洛纪念讲学奖（Weinblum Memorial Lectureship）”。Aleksandr Korobkin教授曾经组织过国际学术会议5次，受邀参与国际会议做大会报告10次以上。迄今为止，Korobkin教授出版专著和编著10本，发表学术论文109篇，会议论文98篇，其在线性与非线性水动力学、流固耦合分析以及有限元方法等方面均有所建树，其学术水平在该领域享有胜誉。
KHABAKHPASHEVA TATYANA，英国东安格利亚大学数学学院高级研究员助理/博导，在冰水动力学的研究成果丰富，近几年在AOR、OE、POF、JFS等国际高水平期刊上多次发表文章，文章主要涉及冰水动力学、流固耦合分析、水弹性波等方面，发表学术论文以及期刊论文100余篇。
报告安排：
报告题目1： hydroelastic waves in an ice channel
报 告 人：Tatyana Khabakhpasheva
报告时间：2019年4月2日 8:30-9:30
报告内容：Linear progressive waves in a channel covered with ice sheet are studied. The problem is solved by the normal mode method for a channel of finite depth and by using the shallow water approximation for a channel of small depth. Giving a method to determine the dispersion relations of the hydroelastic waves and the characteristics of these waves.
报告题目2：hydroelastic waves by a moving load or underwater body
报 告 人：Tatyana Khabakhpasheva
报告时间：2019年4月2日 9:30-10:30
报告内容：Unsteady response of an ice cover in a channel with vertical walls is studied for large times. The ice deflection is caused by a load moving along the frozen channel at a constant speed. An underwater body moving under the ice with a constant speed along the channel also introduced. The time-dependent problem is solved by using the Fourier transform along the channel and the method of separating variables. The number of the waves and their amplitudes are calculated for a given load and its speed. The maximum stress in the ice as a function of the load speed is estimated.
报告题目3：wave interaction with vertical cylinders
报 告 人：Aleksandr Korobkin
报告时间：2019年4月2日 10:30-11:30
报告内容：The linear three-dimensional problem of ice loads acting on a vertical circular cylinder frozen in an ice cover of infinite extent is introduced. The problem is solved by both the vertical mode method and using the Weber integral transform in the radial coordinate. Each vertical mode corresponds to a root of the dispersion relation for flexural-gravity waves. It is proved that these two solutions are identical for the clamped edge conditions. A general solution of the wave-cylinder interaction problem is derived by the method of vertical modes and applied to different edge conditions on the contact line
报告题目4：water impact with broken ice
报 告 人：Aleksandr Korobkin
报告时间：2019年4月2日 14:30-15:30
报告内容：The unsteady problem of a rigid body impact onto a floating plate is introduced. The problem is studied also by a fully-nonlinear computational-fluid-dynamics method and the hydrodynamic force is calculated by using the second-order plate impact model.
报告题目5：Semi-analytical models and CFD in water entry/exit problems
报 告 人：Aleksandr Korobkin
报告时间：2019年4月2日 15:30-16:30
报告内容：The three-dimensional steady problem of an elongated smooth body moving along the water free surface at a constant speed is considered within the 2D+T approximation. The hydrodynamic loads during the entry/exit stage are evaluated by the original Wagner model of water impact.
报告题目6：experiments and theory on fast lifting of a circular disc from water surface
报 告 人：Tatyana Khabakhpasheva
报告时间：2019年4月2日 16:30-17:30
报告内容：We consider the flow induced by a rigid flat plate, initially touching a horizontal water surface, when it starts to move upwards with constant acceleration. It is shown that close to the plate edges the flow is non-linear and self-similar in the leading order. This nonlinear flow is computed by the boundary element method combined with a time-marching scheme. The results of an experimental investigation aimed at measuring the hydrodynamic force felt by the plate is presented.
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