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Digital Modeling and Finite Element Analysis for Stretching Screed of Asphalt Paver

Author: ChouHaiZhu
Tutor: WenLiGe
School: Jilin University
Course: Mechanical Engineering
Keywords: Asphalt paver Telescopic screed Digital Design Virtual Assembly Finite Element Analysis
CLC: U415.52
Type: Master's thesis
Year: 2011
Downloads: 50
Quote: 0
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Abstract

With the rapid development of China's highway construction, especially in large-scale construction of the highway, led to the rapid development of road construction machinery, one of the main mechanical asphalt paver has been considerable progress and development as highway construction. Telescopic screed asphalt paver system, one of the important part of a direct impact on the degree of compaction and density of asphalt concrete. In this paper, digital design digital design technology telescopic screed asphalt paver. Digital design technology is easy to implement parallel design, reducing the production of physical prototypes, directly on the computer, motion simulation and finite element analysis, product design developed countries mainstream design methods. Digital design technology has great significance to the actual product design, improve the design of the telescopic screed degree of standardization and innovation capability, has a certain reference significance for improving the design of the telescopic screed, for subsequent computer simulation, finite element analysis provide digitized virtual prototyping and computer-aided manufacturing, and the subsequent improvement of product design and optimization has guiding significance. In this paper, based on analysis asphalt paver works, as well as telescopic screed works and structures, and feature modeling technology in engineering applications and feature modeling methods, convenient feature modeling maintenance and change of the model, select CATIA as the asphalt paver telescopic screed establish a digital model of support and development platform, feature modeling technology to do a three-dimensional digital design of the the asphalt paver telescopic screed, generate production universal application of the two-dimensional drawings. Discussion of the design methodology to support design for assembly (DFA), the top-down design methodology to determine the the asphalt paver telescopic screed assembly information and hierarchical model to determine the assembly level, the assembly sequence and assembly constraints, in accordance with the assembly level assembly tree of the sub-assembly to create the virtual prototype of the the asphalt paver telescopic screed, the virtual prototype interference checking, inspection process is accompanied by the entire telescopic screed assembly process, step-by-step through the entire assembly in accordance with the assembly-level tree body interference checking, adjusted and modified virtual prototyping without interference. To add movement Vice check all moving parts collision interference. Telescopic screed asphalt paver paving job in a state of dynamic equilibrium, vibrating beam screed screed plate deformation so to vibrate impact will break this equilibrium, the quality of concrete pavers severely impact. Therefore, in order to improve the reliability of the product, on the part of the wear parts and large deformation static finite element analysis, including vibrating beam screed floor, eccentric shafts, connecting rods and screed parts deformation stress contours and stress-strain data, it is judged parts stress concentration, the size modification of the parts, the to avoid unreasonable stress concentration, improve the rigidity of the parts.

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