FLUENT鼓虾夹螯合拢过程动力学分析及仿生设计
关键字 鼓虾 夹螯 高速射流 仿生
毕业论文设计说明书外文摘要
Title Dynamic Analysis and Simulation Design of The Snapping Shrimp Closuring
Abstract
The snapping shrimp lives in shallow waters of tropical oceans,which has a length about 5.5cm,and its claw could reach to 2.5cm.The shrimp closures the claw rapidly,when it is used to defend a shelter or territory and to stun and even kill prey animals.This reasults in a high-velocity water jet,speed of 100 Kilometer.The loud snap has attributed to the mechanical contact made when the dactyl and the propus hit each other as the claw closes.Here,we show that the sound originates solety from the collapse of a cavitation bubble taht is generated by the fast water jet resulting from the rapid claw closure.The claw has a protruding plunger on the dactly and a matching socket in the propus.A high-velocity water jet is formed when the dactyl plunger is driven into the propus socket,displacing water. This article based on an experiment of Michel Versluis[2],analysed the extremely rapid closure of its larger snapper claw, and attempted to design a bionic device, by analysing the structural features of the snapp shrimp. By means of basic kinetic analysis and assumptions, we get the parameters of the device.Finally, based on a simplified model system of nozzles, obtained the status of the flow field at different time points,with the FLUENT. The simulation results consistent with the actual value.
Keywords Snapping-Shrimp Claw High-velocity water-jet Simulate
目次
1 绪论 3
1.1 研究背景及意义 3
1.2 国内外研究现状 4
1.3 本文研究的主要内容 7
2 鼓虾射流空化形成机理分析 9
2.1 夹螯敲击射流分析 9
2.2 空化泡形成机理 9
2.3 空泡溃灭能量分析 10
3 仿生装置结构设计 13
3.1 鼓虾敲击射流实验结论 13
3.2 设计要求 14
3.3 仿生装置原理和动力学分析 14
3.4 仿生装置尺寸参数 16
4 仿生装置流体力学仿真分析 22
4.1 计算流体力学简介 22
4.2 仿生装置流体仿真过程 23
4.3 FLUENT参数设置 25
4.4 结果分析 27
4.5 仿真模型的局限 28
结论 29
致谢 30
参考文献 31
1 绪论
1.1 研究背景及意义
鼓虾又名卡达虾、枪虾，生活于热带海洋的浅水区域，是周围环境噪声的主要产生者，鼓虾常成群出现，伴着类似于烧干树枝一般，噼啪作响的噪声。敲击噪声的频率最高可达2KHz。鼓虾通过快速闭合夹螯产生射流，并依靠触须来感知和分析射流，因此，夹螯敲击在鼓虾的信息传递中扮演者重要角色。
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