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A Design on CAE Analysis of the 13.7 Meter Integral Body Structure about Buses With Triaxiality

Author: WangMingJian
Tutor: NaJingXin
School: Jilin University
Course: Mechanical Engineering
Keywords: Bearer Bus Design
CLC: U463.82
Type: Master's thesis
Year: 2011
Downloads: 88
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Abstract


In this paper, 13.7 m bus market research analysis and revision of standards and regulations for the double-oriented, combined with co-hosting the manufacturers of 13.7 m triaxial bus body skeleton structure of the pre-research design requirements, preliminary research presents a 13.7 m monocoque triaxial bus body skeleton structure of the initial program design, its finite element calculations, and a section with the international comparative analysis of similar maturity models to find design flaws and weaknesses, and to improve optimization, relatively reasonable and reliable results design solutions. Currently, the design of three-axis buses in China has not matured investigate the structure and performance standards, the paper selected a section similar foreign models for the control based on mature, verify design feasibility, optimize the design stiffness and strength index, the specific content of the main as follows: The first chapter describes the topics in accordance with this article and engineering significance, and 13.7 m triaxial buses carrying the technological development of history and analysis summarizes the Integral Coach structural characteristics, the last of the basic theory and finite element Finite element analysis of the process has summarized. Chapter II design from the structure and properties of both the departure, summed up the 13.7-meter-high three load triaxial bus body frame structure design relevant national coach technical design standards and regulations; and from the mechanical point of view, the suspension system matched and the car body structure uses the relationship between the body frame to the specification of a rectangular steel sections and buses, so the overall closed loop described the structural characteristics of modern high-bus; Finally, a combination of these two aspects of this chapter, the initial plan proposed design primarily covers: bearer, buses outside dimensions of the determined parameters of the vehicle through design, interior space allocation, chassis and central keel design, suspension air spring connection support structure design and layout of the air spring, driving Members of the space setting, the local structure of a layer of semi-skeleton design, design right and left side panels, front wall design and cover design, etc.. Chapter sequential analysis of engineering finite element analysis of the advantages of beam element modeling, buses simplified equivalent local structure, load handling and material specifications selected after preliminary program were established on the standard model with a finite element model; preliminary program for benchmarking models with different load-bearing structure, the chapter and then examine the two models were studied in the static strength analysis, static rigidity analysis, static analysis and deformation openings free modal analysis method is applied to the load constraint conditions and respectively engineering finite element analysis, statistical analysis of the results. Chapter IV first preliminary program and on the standard models for the analysis of the working conditions were analyzed statistical results, come to the preliminary program of local poor design structure and design weaknesses, such as the front and rear bridge structure over the local stress is too high, the door frame structures with local stress is too high, opening the front door of the large deformation conditions and so on. Preliminary results for the evaluation of the program, this chapter suggest improvements and optimization program, partial beam structural improvements to the bridge truss structure; structure in local joint welding angle iron door and the door frame in the vertical position welding and welding beams; door angle iron welded joints and structures with local solder paste in the upper part of the door frame steel; critical bearing parts of welded iron strengthening; writing programs for body structure rod section size optimization. Finally, the optimization program for the calculation of each condition and results of statistical analysis and benchmarking models with performance parameters of the control body structure and concluded - static strength of pre-research programs, as well as from static rigidity, static and modal deformation opening analysis of the body structure to achieve good performance parameters are bus design requirements. Chapter summary of the full text, according to the main body structure design and analysis and comparison of pre-research design goal to achieve, and the inadequacy of this look ahead in order to obtain a more optimized design with a more scientific method of analysis.

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CLC: > Transportation > Road transport > Automotive Engineering > Automotive structural components > Cab and body > Car body
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