Digital Modeling And Finite Element Analysis For Stretching Screed Of Asphalt Paver

With the rapid development of highway construction, especially large-scale highway construction, led to the rapid development of road machinery, road construction as one of the main mechanical asphalt paver has been considerable development.Stretching screed is an important part of the asphalt paver, directly affects the degree of compaction of asphalt concrete and density. In this paper, digital design technology for stretching screed of asphalt paver digital design. Digital design for concurrent design is easy to implement, reducing the production of physical prototypes directly exercise the computer simulation and finite element analysis, is already mainstream in developed countries design method of product design. Digital design for the design of the actual product is very helpful for the subsequent computer simulation, provides a digital model for finite element analysis and computer aided manufacturing, to improve and optimize product design with the follow-up guidance.Asphalt paver in the analysis works, and the stretching screed principle and structure of the work, based on feature modeling techniques introduced in the project application and the method of feature modeling, feature modeling to facilitate the model maintenance and change, select CATIA as stretching screed of asphalt paver for digital modeling support the establishment and development platform, the use of feature modeling for stretching screed of asphalt paver made retractable three-dimensional digital modeling, generation universal application of the production of two-dimensional drawings.Discuss support for assembly design (DFA) design methods, with top-down design method to determine the stretching screed of asphalt paver assembly information and the hierarchical model, determine the assembly hierarchy, assembly sequence and assembly constraints,according to the assembly level the assembly tree, assembly pair to form a stretching screed of asphalt paver overall assembly drawing. Create stretching screed of asphalt paver digital model, digital model for interference checking. The process of checking with the stretching screed assembly process, in accordance with the gradual completion of the assembly hierarchy tree interference checking throughout the assembly, test results parts without interference. Add a deputy campaign to check the collision of the moving parts without interference.Paving stretching screed of asphalt paver operation in dynamic equilibrium, vibration beam, the deformation screed to screed vibration impact, will break the balance, concrete paving greatly affected the quality of . In order to improve reliability, easy to wear and deformation of some parts for large static finite element analysis, including vibration beam, floor screed, eccentric shaft, connecting rod and ironing board, has been the deformation of the stress components cloud and the stress-strain data to determine the components of stress concentration, the size of the components change, to avoid unreasonable stress concentration, improve part stiffness.