一种新的三维地下管线衔接模型算法研究

在城市地下管网中,管线通过管件实现相交、衔接和连通等操作,然而地下管线连接方式种类繁多,管件在面对地下管线复杂多样的连接方式时存在无法完全表达的问题。文中主要研究在三维地下管网建模过程中,管件在不能完全表达管线连接方式时的衔接模型,按衔接管径不同将管线衔接建模分为等径管线衔接建模和异径管线衔接建模两类;提出采用圆管—圆球—圆管的组合进行等径管线衔接建模方法;重点研究异径管线衔接建模,提出一种利用ArcEngine组件对象构建多片圆柱体,圆柱体模拟圆环体,若干首尾相接的渐变径圆环体拟合弯管的算法。研究方法能够高效逼真地构建出等径弯管模型和异径弯管模型,解决了地下管线三维模型衔接处的光滑建模问题。

A study of three-dimensional underground pipelines modelconvergence algorithm

In the urban underground pipe network, the pipeline achieves through the tube the intersection, convergence and connectivity operations.However, there are various types of underground pipeline connections, from which a problem occurs that the tube can not fully express complex and diverse pipeline connection mode.This paper mainly studies the connection model of pipeline when the tube can not fully express pipeline connection in the process of 3D underground pipe network modulling.According to the different connection diameters,the pipeline connection modulling is divided into equal diameter pipeline connection modulling and different diameter pipeline connection modeling.The paper proposes a way of pipeline-ball-pipebine combination to achieve the equal diameter pipeline connection modeling,and focues on the method of modulling.When the diameter of the pipeline in connective position is not the same, it proposes a kind of new algorithm that a number of ring that diameter is gradual through the end-to-end way fitting elbow.Every ring is simulated by cylinder with ArcEngine component object mode structure.The method can construct the connective mode if the diameter is the same in pipeline connective position efficiently and realistically, and solve the problem of building a smooth model when the tube can''t connect pipeline in the process of 3D underground pipeline network modulling.