A method for building a three-dimensional model of the inlet section of an inclined tube box-shaped inverted siphon with full parameters

Abstract

The invention discloses a method for establishing a three-dimensional model of the inlet section of an inclined tube box-shaped inverted siphon with all parameters. Step one is to establish a prototype of the three-dimensional model of the inlet section of the pipe body; Model; step 3, modifying the 3D model of the hole body, and finally generating a 3D model of the inlet section of the inverted siphon body; step 4, forming a 3D modeling template for the inlet section of the inverted siphon body, structured packaging, and establishing an inclined tube box-shaped inlet of the inverted siphon body The fully parametric 3D digital geometric model is suitable for the comparison and selection of design schemes and the design process of continuous refinement. This method not only takes the structure size as the input parameter, but also takes the structure shape as the input parameter to quickly generate or modify the three-dimensional model of the inlet section of the inclined tube box-shaped inverted siphon body, with a high degree of parameterization and simple model modification.

Description

technical field [0001] The invention relates to a three-dimensional digital model construction technology, in particular to a method for establishing a three-dimensional model of an inlet section of an inclined tube box-shaped inverted siphon body with full parameters. Background technique [0002] Inverted siphon is a kind of overpass hydraulic structure often used when channels cross roads and rivers or when channels cross valleys. It uses the water level difference between upstream and downstream to transport water from the upstream end to the downstream end. The inclined pipe box Shaped inverted siphon is a form of inverted siphon. The body of the inverted siphon is divided into multiple sections according to the structural joints. The shape and force of the inlet section of the pipe body are more complicated. The size and shape should make the water flow smooth and reduce the loss of water head. At present, the three-dimensional digital model of the inverted siphon is ...

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Problems solved by technology

At present, the three-dimensional digital model of the inverted siphon is basically constructed by CAD software based on geometric features, and the method is limited to one-time generation of the model by taking the structural size as the input. "explains the method of using polyline stretching to create an inverted siphon gradient segment model, and the paper "Development of Inverted Siphon CAD System Based on External Classification Method" published by Yang Baojun, Wang Zongmin, etc. expounds the method of using interactive input structure dimensions to establish an inverted siphon body model , the generated models generally exist: the body shape is single, and the versatility is poor; the degree of parameterization is not high, and the model modification is cumbersome; Neither can be inherited

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