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汽车车架是汽车的重要组成部分。应用有限元方法对某客车车架进行了静态强度分析,详细论述了有限元建模技术和三种危险工况下加载等方面的关键技术,对此类客车车架的静态和动态分析有一定借鉴作用。 相似文献
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针对某型号客车在行驶过程中出现的车窗窗框结构破坏现象,采用有限元方法对客车车身结构作静态强度分析和模态分析,并在此基础上对车身结构作故障诊断,以确定导致车身结构破坏的原因.在整个研究过程中,确立了客车车身结构有限元分析的建模方法和模拟原则,并将静强度计算与模态分析方法结合起来计算客车车身模态下的应力,为今后的客车车身结构故障诊断提供一种新的思路和方法. 相似文献
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介绍CATIA软件的主要特点及应用CATIA软件进行客车底架设计的参数化建模和有限元强度分析的方法. 相似文献
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针对某型号客车在行驶过程中出现的车窗窗框结构破坏现象,采用有限元方法对客车车身结构作静态强度分析和模态分析,并在此基础上对车身结构作故障诊断,以确定导致车身结构破坏的原因,在整个研究过程中,确立了客车车身结构有限元分析的建模方法和模拟原则,并将静强度计算和模态分析方法结合起来计算客车车身模态下的应力,为今后的客车车身结构故障诊断提供一种新的思路和方法。 相似文献
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介绍了有限元理论在客车结构设计中的啦用,提出了三维几何模型的简化原则及在建模过程中存在的问题,并以某6127型客车为研究对象,对通过CATIA和UG建立的三维儿何模型导入到有限元分析软件中的过程及出现的问题进行了系统地阐述,得出了相关的建模技巧。 相似文献
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低地板发动机后置式铰接客车急转弯特性有限元分析 总被引:1,自引:0,他引:1
对于客车车身来说,整体结构的有限元模型部分已经很成熟了。但是对于发动机后置式铰接客车在急转弯工况下的结构有限元分析,尚不多见。文章基于有限元理论,对某型低地板发动机后置式城市铰接客车结构进行建模和静态特性分析。在分析中以汽车各部件的实际连接关系的精确模拟为出发点,考虑了铰接盘处的转动,建立车身有限元模型,并结合国外大汽车公司的FEM行业分析经验,着重考虑了汽车行驶时的急转弯工况,建立了数学模型且对车身强度进行了分析,其结果可作为车身骨架结构优化的参考。 相似文献
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A. Gauchia V. Diaz M. J. L. Boada B. L. Boada 《International Journal of Automotive Technology》2010,11(1):41-47
In this paper, the structural optimization of a real bus structure is proposed. The proposed optimization has been accomplished
by means of genetic algorithms. The structural behavior of the bus structure when subjected to weight and torsion was also
analyzed using the finite element method (FEM). The results demonstrate that improved weight and torsional stiffness are achieved
with the optimized structure. 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(11):807-822
With the use of the numerical method presented in this article, the dynamic analysis of the bus body frame can be carried out even in the designing phase. According to the results, the weak points of the body from the point of view of extreme loads and fatigue can be found and the correction of the construction can be done. As a new method, FEM models with different complexity are used in the different analysis steps. The applicability of the method as a design procedure and the reliability of the proposed models are verified by calculations and measurements concerning a concrete bus type. 相似文献
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Variable Cross-Section Rectangular Beam and Sensitivity Analysis for Lightweight Design of Bus Frame
Wenjie Zuo Jiaxin Fang Minghui Zhong Guikai Guo 《International Journal of Automotive Technology》2018,19(6):1033-1040
Timoshenko beam element of variable cross-section rectangular tube is developed and applied in the lightweight design of bus frame in this paper. Firstly, the finite element formulations of variable cross-section beam (VCB) are derived under the loadsteps of axial deformation, torsional deformation and bending deformation. Secondly, bending deformation experiment and its detailed shell finite element model (FEM) simulation of variable cross-section rectangular tube were conducted; and the proposed VCB, detailed shell FEM and experimental results can be highly consistent. Thirdly, VCBs are used to substitute for parts of the uniform ones in a bus frame. An innovatively lightweight bus frame is obtained and all the performance responses are improved simultaneously. Finally, rollover analysis further shows the advantage of variable cross-section bus frame in crashworthiness design. 相似文献
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对JS6106GHA城市客车的油箱托架结构进行有限元分析,找出缺陷,进行优化改进,以提高其可靠性,从而为合理地设计客车油箱托架结构提供参考。 相似文献
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以有限元分析软件ANSYS为工具,进行了沥青路面结构可靠度的分析与计算,讨论了几何建模、网格划分、失效概率的计算、随机输入输出变量的确定、各设计参数的变异性对于沥青路面结构可靠度的影响、设计参数的相关性等问题。并通过基于多层弹性层状体系应力计算程序对可靠度计算方法进行了检验。结果表明:模量的变异比厚度的变异对可靠度影响大,尤其以土基模量的变异性对可靠度影响最大;面层厚度的变异对于可靠度的影响也比较大。输入变量相关程度都比较低。有限元软件ANSYS计算沥青路面结构可靠度有足够的精度,且计算简便,可以作为路面结构可靠度领域的一种新的计算途径。 相似文献
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M. Esfahanian A. Safaei H. Nehzati V. Esfahanian M. M. Tehrani 《International Journal of Automotive Technology》2014,15(6):1001-1013
In this paper a package for designing, modelling and simulation of three hybrid powertrains are presented. These powertrains are Electric hybrid, Hydraulic hybrid and Flywheel hybrid. The differences among the proposed hybrid powertrains include the energy storage system components, the secondary power converter and also the powertrain configuration. The O457 city bus is considered as the benchmark vehicle. At first, the design process for each hybrid powertrain which is based on the power requirements of the bus in any driving condition is presented. Then, the powertrains modelling using MATLAB/Simulink as a powerful simulating tool is presented. The models are feed-forward and resemble the real world driving conditions. Each model has the blocks for the main components of the corresponding propulsion system. The most important stage in the modeling process is implementing of the components efficiency in each powertrain. Moreover, there is a block in each hybrid powertrain model for the energy management. Finally, the simulation results for comparing the usefulness of the hybrid powertrains are presented. The results indicate that the electric hybrid powertrain has the most effect on reducing the bus fuel consumption. But regarding the fabrication expenses and manufacturing complexity, the hydraulic hybrid powertrain is recommended. 相似文献