surface free form 中文意思是什麼
surface free form
解釋
自由造型曲面-
With the development of computer technology and free - form surface modeling, body plan description on the computer has been converted into hull surface model simulation in which more information is included so that hydrostatic properties calculation can be carried out with hull information directly
隨著計算機技術與復雜曲面造型技術的發展，計算機上的船體型線的描述，目前已發展成為三維曲面乃至三維曲面實體表達。與線框圖相比，三維圖形中包含的信息更為豐富，實現了計算機上船體模型的模擬。 -
When no damaged compartment, damaged stability calculation is just intact stability calculation and when waterplane is horiental, geometric properties calculation is the base of hydrostatic curves. because ship hull is a kind of typical free - form surface, it is satisfactory to be modeled with nurbs
在這種情況下，船舶靜力學性能的計算，可以突破以往計算中所必須的一些假設及簡化，而是直接通過船舶靜力學性能計算的基本原理，在船體曲面圖形上直接進行計算。 -
In the thesis. reading the iges file - 3 - and all the geometry entities and annotation entities are extracted ; on the base of geometry entities extracted, geometry entities are classified based to their three views. a new data structure is proposed to describle 3d form features ; inspection items of the workpiece are recognized ; the cmm - based inspection planning system is built ; on the other hand, as a part of cims, cmm need exchanging data with the software of cad / cam, so iges export interface is developed based on iges standard. in order to show the whole information of the surface, the 3 - dimensional free - form surface is drawing using the opengl
通過讀取iges文件對實體進行分離、提取、識別出對工件進行描述的原始信息；在此基礎上，西安理工大學碩士學位論文提出一種優化演算法對三視圖自動進行分離，建立了一種對工件進行三維描述的數學模型，照此模型對工件進行立體重構；識別出工件的各種檢測信息，提出一種對公差信息進行描述的數學模型，井與三維立體相結合，生成有檢測意義的三維實體；根據三坐標機的測量系統，生成相應的檢測規劃；另一方面，作為cmis的一部分，應具有與cad cam軟體之間的數據交換功能，本文還開發了iges輸出介面，採用opengl繪制三維空間曲面，向用戶展示其全面信息。 -
Surface modeling approach for free - form machining based on the cubic spline function
基於三次樣條的離散點曲面構建演算法 -
Free form surface reconstruction is a key step in reverse engineering cad modeling. on the basis of segmentation, an approach of b - spline surface reconstruction with complicated boundary constraints is addressed
基於復雜邊界約束和內部散亂逼近的b樣條曲面重構理論和技術的研究是本文的一個重點和創新之處。 -
The optimization of fiber placement paths for composite around - parts is studied, and a triangle algorithm is presented which is easy to implement and can be used for the path generation of free form surface - parts. tow width control and shaping error control are also studied
4 .提出了用於封閉殼體構件的纖維鋪放軌跡規劃的三角形法，具有通用性強、計算簡便的特點;並討論了纖維鋪放的成形精度與絲寬控制方法。 -
Code for manoeuvering tests of free - running model of surface ship and standard form for presentatiion of test results
水面自航船模操縱性試驗規程及其結果的標準表達形式 -
The measuring of products with free - form surface is being applied further in airplane industry, automobile, mold and so on. coordinate measurement machine ( cmm ) is playing more and more important role in those industries because of its wide measuring scope, high precision and great efficiency
在航天、汽車、模具等製造領域，都需對復雜曲面產品進行測量，由於三坐標測量機通用性好、測量范圍大、精度好、效率高，因此得到廣泛的應用。 -
Firstly the thesis expatiates the basic concept of reverse engineering, analyzes the basic principle of reverse engineering, the technology & theory of three dimensional measuring and basic theory of building 3 - dimensional free - form surfaces model. secondly it introduces the smooth methods of the free - form surfaces of auto body and solves point - data and surface reconstruction. finally the thesis expatiates applications and technology of auto body of futian heavy truck through reverse engineering
本文首先將闡述逆向工程的基本概念，分析車身逆向工程的基本原理以及車身逆向工程中三坐標測量技術與原理，車身表面三維數學曲面模型建立的理論基礎，其次介紹車身外形曲面光順方法，以及車身逆向工程中點數據處理技術及曲線曲面重建技術，最後結合福田重卡車身逆向開發，重點闡述車身逆向工程技術的應用與流程。 -
The parts reverseeng ineering deals with mostly have freeform surfaces. the regeneration of the free form surfaces is the main task of reverse engineering. in this paper some key techniques for nurbs surface reconstruction in reverse engineering such as b - spline curve fitting, b - spline surface fitting to scattered data, b - spline surfa ce fitting to contour data and b - spline curve fairing are studied
本文研究了逆向工程中b樣條曲面重構的關鍵技術，包括b樣條曲線的擬合、散亂數據的b樣條曲面擬合、逐層掃描數據的b樣條曲面擬合以及b樣條曲線的光順。 -
4 introduce a new method to model complex free - form shape. a new approach is put forward to settle the problem only using a pen and a digital camera. at first, a pen is used to mark curves nets on the surface of the object ; then images are taken through a digital camera and conveyed to a computer
提出、實現了一種便捷的復雜形體的3d曲面建模方法首先在形體表面繪制網格曲線，由數碼相機攝像，經過圖像處理、網格匹配及相機標定等步驟，最終重構出表面的曲面模型。
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