摘要三栖艇是一种既能翱翔于蓝天，具备飞机的快速性，又能遨游在海底，具备潜艇的隐蔽性的一种新型航行器。三栖艇这一概念在二次世界大战中就被提出过，但受到当时技术发展以及研究条件的限制，这一项目的研究被迫中断而没有继续进行下去。近年来，随着相关技术的不断进步以及三栖艇本身所具有的优势符合当今发展的需要这一特点，三栖艇这一概念又被重新提上了日程。

本文三栖艇的设计思路是对现有的水空两栖装置进行改装从而使其具有三栖功能。外形设计是通过考虑不同航态下阻力优化的重要程度而进行的；通过采用两套动力系统来解决水下和空中动力矛盾的问题；另外根据需要进行了设备的选取和材料的确定，最后确定了重心的纵向位置和总布置方案。77113

本文通过粘性流体软件FIN/Marine分析了三栖艇在不同航态下的阻力性能。对空中飞行阻力的研究确定了三栖艇在空中的设计航速；对水下航行时阻力的研究确定了水下航行时的设计航速；对水面航行时的阻力研究确定了水面航行时的设计航速；因此通过对阻力性能的分析，本文确定了三栖艇在三种航态下的最佳航速。

本文在最后还分析了三栖艇水面航行时的耐波性。通过比较不同重心高度下三栖艇的耐波性确定了三栖艇的最佳重心高度。 

毕业论文关键词: 小型三栖艇； 概念设计； 阻力分析

Abstract Amphibious boat is a new aircraft which can not only fly in the blue sky with the rapidity of airplane but also swim in the sea with the submarine concealment。 The concept of amphibious craft was put forward early in the World War II, but on account of the limit of technological development and research conditions at that time, this research project was interrupted and did not continue。 In recent years, with the continuous advancement of technology related to amphibious craft and the characteristic that the itself advantages meet the needs of contemporary development, this concept of amphibious craft has been put forward on the agenda again。

The design thought of amphibious boats is to modify the existing water and air amphibious equipment and make it have amphibious capabilities。 Exterior design is carried out by taking into account the importance of the resistance optimization of the various sailing situations; through the use of two power systems to solve the problem of the conflicts between underwater and aerial power; in addition according to the need to determine the selection of material and equipment, in the end to confirm the center of gravity of the longitudinal position and general arrangement。

Then, this paper research resistance performance of its various sailing situations by using the viscous fluid software FINE/Marine。 The design speed of the amphibious boat in the sky are determined by the research of resistance performance in the air。The design speed of the amphibious boat in the water are determined by the research of resistance performance in the water。 The design speed of the amphibious boat underwater are determined by the research of resistance performance underwater。 Therefore, by resistance performance analysis, we determine the optimal speed of the three amphibious boat flight States。

Finally, this paper research the seakeeping while amphibious boats sail in the water。 Through the comparison of the amphibious craft’s seakeeping at different height of gravity , this paper ultimately determine the height of of gravity。

Keywords: small amphibious craft; conceptual design; resistance analysis

目录

第一章 绪论 1

1。1 背景与意义 1

1。2 国内外发展现状 2