共查询到17条相似文献,搜索用时 140 毫秒
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为满足未来汽车对座椅轻量化的要求,提出一种轻量化镁合金座椅骨架设计方案。该方案中镁合金靠背和坐盆均为一体式结构,可以在保证骨架强度性能的同时降低骨架重量。为了研究镁合金座椅骨架的静态及动态强度性能,分别使用Ls-Dyna软件以及软钢模样件对镁合金座椅骨架进行了FEA仿真分析和强度试验验证,结果表明镁合金座椅骨架可以满足试验标准要求。在保证强度足够的情况下,新设计镁合金座椅靠背比原钢结构靠背总成重量减轻44.5%,新设计镁合金座椅坐盆比原钢结构坐盆总成重量减轻37.2%。 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(5):703-722
A combined lumped-parameter and multi-body system dynamic model of the human body–seat system has been constructed with masses and moments of inertia and with linear translational and rotational springs and dampers. The model was developed in four steps by minimising the sum-of-least-squares error between laboratory measurements and model predictions of the fore-and-aft driving point apparent mass and the fore-and-aft transmissibility of a car backrest. Good agreement was achieved between model predictions and both the median measured driving-point apparent mass and the median measured backrest transmissibility with six subjects. The model was capable of representing the measured apparent masses and predicting the backrest transmissibility with the individual subjects. It was also capable of predicting the backrest transmissibilities of two different car seats. A sensitivity study was conducted and the effects of the model parameters on the peak moduli and corresponding frequencies of the apparent mass and the backrest transmissibility are presented. 相似文献
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介绍了汽车座椅调角器的功能和设计要求,确定了调角器研究开发的重点。完成了调角器的方案设计,阐述了行星齿轮式调角器的工作原理,进行了调角器核心件的详细设计,实现了汽车座椅靠背角度的连续调节和可靠自锁。 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(9):1287-1304
In the current environment of increased emphasis on sustainable transport, there is manifold increase in the use of bicycles for urban transport. One concern which might restrict the use is the ride comfort and fatigue. There has been limited research in addressing the difficulty in bicycle ride comfort quantification. The current study aims to develop a methodology to quantify bicycle discomfort so that performance of bicycles constructed from bamboo and aluminium alloy can be compared. Experimentally obtained frequency response functions are used to establish a relation between the road input and the seat and rider response. A bicycle track input profile based on standard road profiles is created so as to estimate the acceleration responses. The whole-body-vibration frequency weighting is applied to quantify the perception of vibration intensity so that eventual discomfort ranking can be obtained. The measured frequency response functions provide an insight into the effect of frame dynamics on the overall resonant behaviour of the bicycles. The beneficial effect of frame compliance and damping on lower modes of vibration is very clear in the case of bamboo frame, in turn affecting seat and rider response. In the bamboo frame, because of multiple resonances, the frequency response of the handlebar is smaller at higher frequencies suggesting effective isolation. Further improvements may have come from the joints made from natural composites. Overall, based on the comparative analysis and the methodology developed, bamboo frame shows significant improvement in ride comfort performance compared with the aluminium frame. 相似文献
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通过对近年来镁合金的生产应用情况的介绍以及对镁合金制造汽车零部件的优越性和主要困难的分析,从而指出了镁合金在汽车应用中的新动向和今后研究的课题。 相似文献