Tribon M3_TID_使用整理
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Tribon M3User's Guide用户手册（自整理）附后有TID应用模块（超连接TID)初始设计主要模块（TID）Tribon M3 Form船型定义Tribon M3 Lines线型（光顺）Tribon M3 Surface & Compartment曲面和分舱Tribon M3The Geometry Modeller各模块功能：Tribon M3 contains four separate but integrated systems for geometry modelling: Tribon M3 Form（含船型定义和性能分析计算）·Powering Module(formerly POWER)阻力推进· Manoeuvring Module(formerly RESPONSE)操纵稳定性 ·Seakeeping Module(formerly MOTION)波浪·Dynamic Positioning(formerly DPDAS)动水力Tribon M3 Lines（含船型参数定义和线型光顺，生成曲面及静水力分析）Tribon M3 Surface（含曲面处理，生成生产设计要素）Tribon M3 Compartment（对船体进行分舱及计算）Lines线型（光顺）Major Tasks主要功能：Fairing the Design3D Curve FairingCurve EditingWaterline EndingsDecksHull DistortionGenerating a surfaceHull Form Definitions采用B样条数学方法对2维和3维曲线定义，处理。
Tribon Lines uses2-D and3D-sPACE曲面片和曲线编辑curves to define a hullform, of which the mathematical basis is B- Splines.The mathematical spline is a close analogue of the draughtsman's spline,a long narrow strip of wood or plastic shaped into the required curve form by lead weights called "ducks".If the draughtsman's spline is considered as a long thin elastic beam, then Euler's equation yields:where M(x) is the bending moment,E is Young's modulus,I is the moment of inertia and R(x)is the radius of curvature.For small deflections we can assume:where y"denotes the second derivative of the deflection y with respect to x. If the ducks are assumed as simple supports:(a linear function)where A and B are constant, thereforeIntegrating the above equation twice shows that the physical spline can be described by cubic polynomials between supports:where a, b, c and d are coefficients of the polynomial.B-spline curves are splines in which the vertices of an open polygon together with an appropriate knot vector and the B-spline basis functions of the required order uniquely define the curve shape (see Figure 1:2.: B-Spline Curve with Defining Polygon.).Theprime user functions of the B-Spline polynomial used in theTribon Lines system are:1.Display of polygon vertices on the graphics screen andinteractive modification of the local curve shape by redefiningthe polygon vertices.2.Provision for creating a knuckle:i.e. a discontinuity inthe first derivative of the curve. The B-spline definition for theentire curve span is unaffected by the introduction of a knuckle.3.Provide a stable fit through uneven or irregularlysPACE曲面片和曲线编辑d data points.4.The B-spline can be easily interrogated for propertiesof the curve such as coordinates of a point, or the slope andcurvature at a point and the area enclosed by the spline.B-spline Properties（B样条曲线特性）Convex HullThe B-spline curve must be within the largest convex polygon obtainable from the defining polygon. As a consequence of the convex hull property, for a cubic B-spline if 4 consecutive polygon points are colinear then a straight line is obtained.Variation DiminishingThe B-spline curve does not oscillate about any straight line more than its defining polygon.Numerical Stable/Computationally EfficientLines uses an algorithm for B-spline evaluation that is not only computational fast, but is also stable so that round off errors do not accumulate. The algorithm has the further advantages that it is compact and requires very little intermediate storage.Figure 1:2.B-Spline Curve with Defining Polygon.1.3.3 Principal Functions Provided功能概要Importing Data输入数据可以输入2维型值或导入数据文件。
依次为首尾轮廓线，控制线（FOS边平，Knuckles折角，FOB底平，Plines 多义线），站线、肋骨表型值。
然后构筑船壳外型对Waterlines水线和Buttocks纵剖线进行初步光顺检查。
Exporting Data输出数据输出格式为HFD, BRITFAIR and IGES：Section Area curves to a specified Waterline对应水线横截面面积曲线。
Hydrostatics i.e. volume, LCB and form properties of a ship静水力Transposed Sections i.e.new section positions after modification of the Section Area Curve.指定剖面积Directories of sets of curves i.e. Buttocks,Waterlines etc. 水线纵剖线Curve data i.e. coordinates and B-spline definitions of any curves任意曲线数据如坐标Girths of any stored curves.任意曲线围长Loftbook showing directories and user selected crossing points.光顺报告附加有比例、定位等输出控制。
Setting Global Values设定坐标系原点Viewing Hullforms and Curves观察船型和曲线（2维或3维模式）观察窗口可以命名Editing Curves and Points编辑曲线和点Prefit（预设处理）可以设定曲线数据点。
(PACE曲面片和曲线编辑)—可以处理一批曲线。
Fairing光顺通常的光顺方法：用最少的数据，例如轮廓线、一些控制线及初始站线。
加上hullform（船型定义模块）的一些限制。
及结构线construction lines (CLINES)（折角线、切线）或多义线Pline（由结构线投影的正交线、一定切角产生的三维线用于检查光顺情况）。
Creating Construction Lines创建结构线结构线通常由曲面片和三维曲线定义和处理而来。
其功能主要用来进行如梁拱和类似的混合曲线定义。
