Static balance-based contact network cable three-dimensional dynamic modeling method

Abstract

The invention discloses a static balance-based contact network cable three-dimensional dynamic modeling method. The method comprises the steps of constructing a contact network by using two-node nonlinear units in a space through utilizing a finite element theory, assembling a rigid matrix and an unbalanced force matrix according to a structural topology relationship of the contact network by utilizing a cable and rod combined structure-based nonlinear finite element modeling method, and establishing an overall nonlinear balance equation; by applying a Newton-Raphson method, solving static geometric parameters after loading of the contact network; based on solved static balance parameters of the contact network, representing a contact network three-dimensional model by adopting a triangular patch construction method; by applying a three-dimensional space analytic geometry method, calculating model data such as a normal vector, a triangular vertex conversion matrix and the like; and finally through real-time rendering, automatically generating a high-precision contact network three-dimensional digital model. According to the method, a large amount of manual modeling work of contactnetwork designers is reduced; and the generated high-precision three-dimensional model provides an accurate model source for later design check.

Description

technical field [0001] The invention relates to the field of three-dimensional model modeling of an electrified railway catenary, in particular to a three-dimensional dynamic modeling method for catenary threads based on static balance. Background technique [0002] At present, in the catenary 3D BIM (Building Information Modeling) design, the approximate 3D model of the catenary clue structure is generally constructed by manual modeling. The manual modeling method has a large workload, and does not consider the changes in the parameters such as the guide height and pull-out value of the catenary after loading, and once the design parameters change, it is time-consuming and laborious to manually modify the model. Therefore, catenary clue modeling has become a bottleneck link restricting the development of catenary BIM design. The industry urgently needs to study catenary clue data-driven automatic construction that can meet design data association, model automatic change, an...

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Problems solved by technology

[0003] The current railway modeling research mainly focuses on the on-site data collection of real railway objects in the real world and the research on the method of reconstructing the real railway objects according to the collected data, and most of the physical objects of railways are concentrated in the models of railway lines, buildings, geological terrains, etc. Research on 3D Parametric Dynamic Modeling of Nets

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