DEVELOPMENT OF NUMERICAL ANALYSIS METHOD AND INTERNAL MECHANISM OF BREAKING WAVE ON ARBITRARY BOUNDARY SHAPE CONDITION

任意边界形状条件下破碎波数值分析方法及内部机理的研究

• 批准号: 03650428
• 负责人: TAKIKAWA Kiyoshi
• 金额: $ 1.15万
• 依托单位: KUMAMOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03650428/
• 关键词: BREAKING WAVE; BREAKING WAVE MECHANISM; NUMERICAL SIMULATION; FEM METHOD; SMAC METHOD; GSMAC METHOD; BREAKING WAVE FORCE; WAVE DEFORMATION; 砕波の内部機構; GSMAC法

THIS RESEARCH HAS TAKEN TO CLEAR THE INTERNAL MECHANISM OF BREAKING WAVE, AND TO PRESENT THE NUMERICAL MODEL OF ENERGY DISSIPATION CAUSED BY VOLTEX AND TURBULENCE IN WAVE BREAKING PROCESS, AND TO DEVELOP THE NUMERICAL ANALYSIS SYSTEM OF WAVE DEFORMATION AND BREAKING WAVE ON ARBITRARY BOUNDARY CONDITION.1. EXPERIMENTAL RESEARCHWE DID MANY TYPE EXPERIMENT OF BREAKING WAVE SUBJECTED TO A PROGRESSIVE WAVE ON SLOPE AND A SUBMERGED BREAKWATER, A STANDING WAVE IN FRONT OF VERTICAL WALL AND BREAKING WAVE FORCE OF A PIPE. VARIATION OF VOLTEX, TURBULENCE, REYNOLDS STRESS-STRAIN AND OTHERS WERE CALCULATED FROM EXPERIMENTAL DATAS AND THERE'S DISTRIBUTION IN TIME AND SPACE WERE INVESTIGATED. FROM THESE EXPERIMENTAL RESULTS, IT BECAME CLEAR THAT THE ENERGY DISSIPATION IN BREAKING WAVE PROCESS IS SUBJECTED TO REYNOLDS STRESS OF PRANDTL TYPE AND TIME-DEPENDENT REYNOLDS STRAIN AS TO ACCELERATION TERM.2. THEORITICAL RESEARCHWE APPLIED S M A C METHOD FOR MORE EXACT CALCULATION OF BREAKING WAVE PROCESS, BECAUSE THIS BREAKING WAVE PHENOMENON IS A HEAVY NONLINEAR AND UNSTEADY PROBLEM OF VISCOUS FLUID. AS A FAST CONDITION OF CALCULATION, USING F E M DEVELOPED BY AUTHOR, SIMULATION ANALYSIS OF THE BREAKING PROCESS OF WAVES WAS PERFORMED ON THE BASIS OF THE MODIFIED S M A C METHOD IN ORDER TO EXAMINE THE PHYSICAL QUANTITIES INSIDE THE BREAKING WAVES. AN NUMERICAL MODEL OF ENERGY DISSIPATION OF THE BREAKING WAVE WAS SET UP, WHICH WAS CAUSED BY RUSH OF WATER BLOCK AND TURBULENCE IN BREAKING WATER. THIS MODEL SIMULATES THE BREAKING PROCESS OF WAVES IN GOOD AGREEMENT.

本研究旨在明确破碎波的内在机理，提出波浪破碎过程中涡流和湍流引起的能量耗散的数值模型，开发任意波变形和破碎波的数值分析系统。边界条件.1.实验研究我们对斜坡上的行进波和水下防波堤的破碎波、垂直墙前的驻波和管道的破碎波力进行了多种类型的实验。根据实验数据计算了涡流、湍流、雷诺应力应变等的变化，并考察了其在时间和空间上的分布。从这些实验结果可以清楚地看出，碎波过程中的能量耗散受普朗特型雷诺应力和加速度项的时变雷诺应变的影响。2．理论研究由于这种破伤波现象是粘性流体的一个严重的非线性和不稳定问题，因此我们应用SMAC方法对破伤波过程进行了更精确的计算。作为快速计算的条件，利用作者开发的F E M，在改进的SMAC方法的基础上，对波浪的破碎过程进行了模拟分析，以考察破碎波内部的物理量。建立了由水块冲流和破碎水中湍流引起的破碎波能量耗散的数值模型。该模型很好地模拟了波浪的破碎过程。

项目成果

Kiyoshi Takikawa: "Development of Numerical Analysis System of Deformation and Breaking wave on Beach" International Journal for Numerical Methods in Fluids.

Kiyoshi Takikawa：“海滩变形和破碎波数值分析系统的开发”国际流体数值方法杂志。

KIYOSHI TAKIKAWA: "AN ANALYSIS TECHNIQUE FOR PERMEABLE BREAKWATERS USING THE BOUNDARY ELEMENT METHOD." ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS. VOL.10-4. 299-305 (1992)

KIYOSHI TAKIKAWA：“使用边界元法的渗透性防波堤分析技术。”

KIYOSHI TAKIKAWA: "NUMERICAL ANALYSIS AND INTERNAL MECHANISM OF WAVE BREAKING PROCESS ON SLOPING BOTTOM." COASTAL ENGINEERING IN JAPAN. VOL.38. 61-65 (1991)

KIYOSHI TAKIKAWA：“坡底波浪破碎过程的数值分析和内部机制”。

Kiyoshi Takikawa: "Development of Numerical Analysis System of Deformation and Breaking wave Beach" International Journal for Numerical Methods in Fluids(Arranged Publication).

Kiyoshi Takikawa：“变形和破碎波浪海滩数值分析系统的开发”国际流体数值方法杂志（安排出版）。

滝川 清: "円柱に作用する砕波波力の特性" 土木学会西部支部研究発表会概要集. 146-147 (1991)

Kiyoshi Takikawa：“作用在圆柱体上的破碎波浪力的特性”日本土木工程师学会西部分会摘要集146-147（1991）。