共查询到20条相似文献,搜索用时 62 毫秒
1.
2.
白车身的刚度是影响整车NVH性能及操纵性的重要评价指标,通过结构灵敏度分析可获得最优的白车身结构刚度设计,而通过利用CAE分析对局部模型刚性化后的白车身刚度、模态性能变化计算结构的灵敏度是一种有效的结构优化参考方法。 相似文献
3.
《汽车工程》2017,(11)
建立了某SUV白车身有限元模型,对车身静态刚度和模态分布进行优化,改善了白车身的振动性能。通过灵敏度分析筛选白车身关键部件的厚度并将其作为优化变量,以车身的扭转刚度和质量作为目标,建立其径向基函数模型,将静态刚度、车身1阶扭转和1阶弯曲模态频率作为约束条件,并利用多目标遗传算法对车身性能进行优化。试制了优化后白车身关键部件,并进行模态试验,验证了优化结果的正确性。优化后在总质量增加0.55%的情况下,提升了车身整体刚度,改善了模态频率分布,后排左、右侧座椅安装点的传递函数峰值分别下降了47.50%和49.37%,极大地改善了车身振动性能,为整车NVH性能的提升打下良好基础。 相似文献
4.
5.
6.
7.
针对某轻客的共振问题,通过整车频谱实验、白车身的有限元模态分析及模态实验,识别出其原因为车轮转动1阶激励频率与白车身固有频率接近而引起整车共振。应用模态贡献率方法,对车身结构进行改进,从而改善了整车NVH性能。 相似文献
8.
9.
10.
11.
在能源危机和环境污染问题的压力下,寻找替代石油的新能源车成了必然的选择。世界各大汽车公司以及国内各大科研机构和高等院校纷纷致力于开发清洁节能汽车,新能源汽车获得了长足发展。在我国发展新能源汽车对整个中国汽车业的发展意义重大。文章介绍了目前世界上5种新能源汽车和国内外新能源汽车的发展现状和前景,指出我国发展新能源汽车所面临的问题,建议政府应大力扶持,加大研发力度;加强行业和国际间合作,使新能源技术发展走向多元化。 相似文献
12.
13.
新能源汽车作为未来汽车的发展趋势,有着十分广阔的发展前景。文章简要介绍了新能源汽车的分类,结合当前我国新能源汽车的发展现状,通过分析了近年来我国新能源汽车的产量、国内乘用车车企新能源汽车销量,得出未来我国新能源汽车发展的趋势。 相似文献
14.
15.
电动汽车的现状及发展趋势 总被引:4,自引:0,他引:4
当今世界节能和环保日益引起关注,因此电动汽车正在加速发展。本文综合论述了纯电动汽车、混合动力电动汽车和燃料电池电动汽车的研究现状,并对它们未来的发展趋势作了展望。 相似文献
16.
根据智能车辆控制系统与控制方法的最新进展,对车辆纵向控制方法、横向或转向控制方法、车辆间的通讯策略以及车辆综合控制方法等方面的研究进行了详细的分析和对比,并重点提出了低能见度条件下的车辆控制这一研究课题,最后对下一步的研究工作进行了展望。 相似文献
17.
Yubiao Zhang Amir Khajepour 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2018,56(9):1315-1343
This paper proposed a unified model including yaw and roll dynamics for any axle or articulation configuration of buses by using a reconfigurable approach. First, all the possible existing configurations of buses are introduced, including the axle/articulation configuration, powertrain configuration, and active chassis control configuration. Consequently, the research is motivated by a key question: how can we develop a unified model that is inclusive and configurable to all of the above bus configurations? To develop the model, three layers of the modeling process are presented step by step. The magic formula and vertical load transfer are discussed to formulate the tyre model. It is noted that the case of the articulated bus is presented in an independent section but how it is included and unified in a general form is also explained. Finally, a modeling validation of axle or articulation configuration cases is performed and the comparative results to high-fidelity models show the feasibility, efficiency, and convenience of the reconfigurable approach. As the crucial feature, the resulting model can be potentially applied to model-based controller design in any buses without reformulating the model. This will greatly benefit the vehicle dynamics control and also future autonomous buses. Although the focus of this paper is buses, the proposed approach actually covers any multi-axle/articulated vehicles, like trucks, tractor-trailers. 相似文献
18.
分析了国内外电动汽车的发展现状,并从我国电动汽车技术发展状况入手,着重分析了我国电动汽车发展的优势,如燃料电动汽车整车集成技术、电机和驱动系统、电动汽车的4轮驱动、电动机及其控制技术等取得的进展。指出了在整车技术、电动汽车关键技术、电动汽车标准、基础设施建设及知识产权等方面存在的不足,从而有针对性地提出我国电动汽车的发展对策 相似文献
19.
20.
Fuel economy comparison of conventional drive trains series and parallel hybrid electric step vans 总被引:1,自引:0,他引:1
S. B. Han Y. H. Chang Y. J. Chung E. Y. Lee B. Suh A. Frank 《International Journal of Automotive Technology》2009,10(2):235-240
A hybrid electric vehicle (HEV) is a vehicle that combines a conventional propulsion system with an on-board rechargeable
energy storage system to achieve better fuel economy than a conventional vehicle HEVs do not have limited ranges like battery
electric vehicles, which use batteries charged by an external source. The different propulsion power systems may have common
subsystems or components. The objective of this study is to compare the fuel economies of a conventional step van, a series
hybrid electric step van (HESV), and a parallel HESV by calculating the fuel consumption using the ADVISOR software by NREL.
We also showed the results of the vehicles in different driving cycles including the Central Business District bus cycles,
the New York City Cycle, and the US EPA City and Highway cycles. 相似文献