共查询到20条相似文献,搜索用时 609 毫秒
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运用有限元分析法,在重卡车架3D模型基础上采用合理的模型简化方法建立车架CAE模型,运用有限元软件HyperWorks,对重卡车架采用"C"型截面纵梁及槽型截面纵梁进行对比分析,研究"C"型截面纵梁在重卡车架上使用的可行性。 相似文献
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针对现场实际情况本文提出了大跨径钢管拱分两段浮吊吊装的方法、拱肋合龙方案和有限元模型简化方法,通过计算分析确定了合龙过程中的相关技术参数和拱肋力学状态。 相似文献
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1.3理论和试验模态结果分析对比
由表1、表2及各阶模态振形描述看到,理论计算模态与试验模态相比最大误差为-8.29%,如表3、图22所示,振形基本吻合,表明了有限元模型能较好地反映车架的动力学特性,模型简化较为合理。 相似文献
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一种基于面删除操作的视相关LOD模型简化方法 总被引:1,自引:0,他引:1
章提出了一种基于面删除操作的视相关LOD模型简化方法。通过视相关LOD模型简化原理找出能删除的面片;每次删除一个或多个面片;由删除面片的外轮廓形成了一个单连通域,并将此区域重新构建成三角网。结果表明,此方法运行效率较高,适用于三维可视化研究。 相似文献
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本文探讨FR式汽车动力传动系扭振的局部模态及其主导子结构和半轴子结构对称分支的模态对称性与模型简化问题,在这两方面取得了一些新的认识,有助于对这类汽车动力传动系扭振分析模型的合理简化和对扭振特性的深入认识。 相似文献
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G. Sauvage 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1984,13(1):43-59
In a preceding article [1], we had presented the exact methods of calculation for the characteristics of rectilinear and helical springs. As we announced there, an important simplification can be made by replacing the helical spring with an equivalent rectilinear model. This point will be developed in the following article. 相似文献
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赵文辉 《内蒙古公路与运输》2012,(1):45-47
水泥混凝土桥面铺装力学计算分析中,桥梁跨径对铺装层力学响应有重要影响。文章针对跨径长短对桥面铺装力学性能指标的影响展开研究,为桥面铺装力学计算中模型的简化提供理论依据。 相似文献
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通过对正交异性钢箱梁桥面结构作适当简化,用平面刚架结构分析了桥面板的受力,揭示了桥面结构的受力特点,可作为钢箱梁结构设计和结构优化的参考。 相似文献
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S. -B. Li X. -Q. Guan T. -L. Lu J. -W. Zhang 《International Journal of Automotive Technology》2008,9(4):483-491
An 8 degree-of-freedom (DOF) vehicle model is established to investigate the vertical vibration characteristics of an exhaust
system excited by road surface inputs. The simplification of an exhaust system relevant to the vehicle model is discussed
in detail, including the steps of exhaust modal analysis, definition of mass element, exhaust partitioning, parameter acquisition,
and simplified exhaust validation. The vehicle model is developed based on a half-vehicle model, simulated using MATLAB/SIMULINK,
and validated by comparing the simulation and experiment on various road profiles. Results show that the vehicle model effectively
represents the dynamics of the vehicle characteristic in vertical vibration. 相似文献
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A new,non-canonical Poisson regression model for the prediction of crashes on low-volume rural roads
The purpose of the study was to compare the prediction power of a simplified non-canonical Poisson crash-prediction model to other model types. The model, fitted to serious and fatal crash data from 86 two-lane low-volume rural highway segments, showed a good fit, which was not significantly different from that of a negative binomial model. The application of the present model uses the linear form of the non-canonical Poisson model. Hence the simplification of the model versus other models results from the finding that the expected number of crashes per 1 km is directly proportional to the daily volume, unlike logarithmic functions in other models. In the non-canonical model, it is necessary to estimate only one parameter, whereas estimations of more parameters are needed in the negative binomial model. 相似文献