查詢結果分析
相關文獻
- 尾翼穩定脫殼拋物體之應力分析
- 尾翼穩定脫殼拋物體之分析與設計
- Modified Finite Element Solutions for Planar Entry Flow of an Oldroyd-B Fluid
- Torsional Vibration Analysis of a Damped Shaft System
- 汽機葉片之機械力學分析研究
- 通勤者在平面道路與捷運路網上之運具與路線選擇
- p-Version Space-Time Least-Squares Finite-Element Method for Shallow-Water Equations
- T-型模具之有限元素法PID溫度控制分析
- 股脛關節之有限元素接觸應力分析
- 全觸式鞋內墊與足部之生物力學評估
頁籤選單縮合
題 名 | 尾翼穩定脫殼拋物體之應力分析 |
---|---|
作 者 | 鄭榮和; 曾國金; | 書刊名 | 國立臺灣大學工程學刊 |
卷 期 | 61 1994.06[民83.06] |
頁 次 | 頁129-143 |
分類號 | 447.55 |
關鍵詞 | 尾翼穩定脫殼拋物體; 有限元素法; 非線性動力分析; Fin-stabilized saboted projectiles; Finite element method; Nonlinear dynamic analysis; |
語 文 | 中文(Chinese) |
中文摘要 | 尾翼穩定脫殼拋物體是利用其高動能而達到穿透與破壞的目的。在實際的操作上,拋物體在發射管中加速行進時脫殼必須保持其結構的完整,但在離開發射管時,脫殼則被棄置。由於這個特性,脫殼設計的要求是希望能夠盡量地減輕重量,亦即,要花破壞韌性、抗拉強度極限與質量等因素之間求得最佳之設計。由於設計上對射程、速度、與準確度的極度要求,脫殼與長桿必須使用最少的材料而同時允許應力的水平接近材料的破壞限度。這使得傳統上以直覺做嘗試與修正的方法已無法有效地設計出品質穩定的拋物體系統,而必須仰賴更有系統和更嚴謹的方法,譬如,以有限元素分析來了解拋物體在很劇烈的動力作用環境下,其結構反應的特性。 本研究採用商用有限元素軟體ABACUS以及ABAOUS/Explicit進行高動能拋物體發射過程之應力分析。主要的目標在於瞭解拋物體在發射管內的應力分佈情形,探討脫殼部分結構反應的特性。至於其他影響發射準確度的因素,如發射管的彎曲對於拋物體發射過程所產生的影響亦柱本文中討論。 |
英文摘要 | Fin-stabilized saboted projectiles use its high kinetic energy to penetrate and destroythe targets. In the actual operation, the sabot has to maintain its structural integrity whenthe projectile is accelerating inside the launch tube. The sabot is, however, discarded rightafter the projectile leaves the launch tube. Because of this special function, the designrequirement of the sabot is to reduce the weight as much as possible, that is, to obtain anoptimal design among the factors such as fracture toughness, tensile strength and the mass.Due to the ultimate demand of range, speed, and precision, the sabot and long rod mustuse the least materials while allow for the stresses to be close to the failure limit of thematerials. This has made the traditional trial-and-error method based on intuition no longersuitable to effectively design a projectile system with stable quality. We must reply on moresystematic and rigorous approaches, for example, finite element methods to comprehend thestructural response of the projectile in some severe dynamic loading environments. In this study, commercial finite element program ABAQUS and ABAQUS/Explicit areadopted to perform stress analyses of the projectile during launch. The main purpose isto understand the distribution of the stress in the launch tube, especially the characteristicstructural response of the sabot. Other factors affecting the launch accuracy, such as theeffect of a bent lauch tube on the projectile during its firing are also discussed. |
本系統中英文摘要資訊取自各篇刊載內容。