刘志钦,李小龙,方钟波,任宇鹏,许国辉.风暴液化沉积的波动分选 Monte-Carlo 模拟[J].海洋通报,2019,(3):
风暴液化沉积的波动分选 Monte-Carlo 模拟
The Monte-Carlo simulation of fluctuant sorting in storm liquefaction deposits
投稿时间:2018-06-05  修订日期:2018-10-22
DOI:10.11840/j.issn.1001-6392.2019.03.014
中文关键词:  风暴潮  沉积物  液化  波动分选  碰撞模型  Monte-Carlo 方法
英文关键词:storm tide  sediment  liquefaction  fluctuant sorting  collision model  Monte-Carlo method
基金项目:国家自然科学基金 (41576039)
作者单位E-mail
刘志钦 自然资源部第一海洋研究所山东 青岛 266061 zqliu@fio.org.cn 
李小龙 中国海洋大学 数学科学学院山东 青岛 266100上海交通大学 数学科学学院上海 200240  
方钟波 中国海洋大学 数学科学学院山东 青岛 266100  
任宇鹏 中国海洋大学 环境科学与工程学院山东 青岛 266100  
许国辉 中国海洋大学 环境科学与工程学院山东 青岛 266100 xuguohui@ouc.edu.cn 
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中文摘要:
      风暴潮会引起近岸沉积物再沉积,重新沉积的沉积物具有上细下粗的正粒序排列特征。通过风暴液化沉积模拟试验,我们研究了液化沉积物波动分选的问题,即试验堆中不同粒径颗粒的成层问题。为了更好地了解颗粒成层问题,基于 MonteCarlo 方法,本文根据简化后的砂砾碰撞模型模拟了液化波动后砂砾的分层并给出了砂砾碰撞轨迹图及液化波动分布图。结果解释了两个关键问题: (1) 液化沉积物在长时间的波动振荡过程后,相对粗的颗粒在液化沉积物层的下部聚集较多,上部较少,相对细的颗粒在液化沉积物层的上部聚集较多,下部较少; (2) 作为标识的砂和砾石没有集中在样品柱的下部。
英文摘要:
      Under the action of storm tide, the sediment near shore would redeposit and form the normal graded sequence in re-deposited sediments. Through the storm liquefaction deposit test, this paper studied the issue of fluctuant sorting, i.e. the stratification of particles with different sizes. In order to get better understand the issue of stratification, based on the MonteCarlo method, this paper simulated the stratification of gravels after liquefaction according to the simplified gravel collision model and gave the collision trajectory of gravels and distribution diagram of gravels after liquefaction. The results explained two key issues: (1) After a long period of fluctuating oscillations of liquefied sediments, the gravel which relatively coarse were more concentrated in the lower part of liquefied sediment, while the relative finer gravel were more concentrated in the upper part of liquefied sediment. (2) The sands and gravels which were identified were not concentrated in the lower part of column sample
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