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汽车操纵动力学十八自由度模型仿真研究 总被引:4,自引:0,他引:4
本文介绍了根据多刚体动力学中的凯恩方法建立的一般两轴汽车的十八自由度数学模型。 相似文献
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汽车轮胎结构非线性有限元分析 总被引:3,自引:1,他引:3
本文综述了轮胎力学的发展历史与现状,阐明了轮胎结构分析的几各主要方法、研究内容及其优缺点,并重点介绍了在子午三维非线性有限元结构分析方面的工作,包括轮胎的充气,竖直加载、稳态滚动、滚动阻力及温度场分析,给出了相应的算例。由于采用一些新的方法和技术,考虑了更真实的轮胎材料模型,结构和载荷,使得分析更为有效、精确,分析结果可作为轮胎的设计,试验与改进的依据。 相似文献
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Comparison of robust H∞ filter and Kalman filter for initial alignment of inertial navigation system
There are many filtering methods that can be used for the initial alignment of an integrated inertial navigation system. This paper discussed the use of GPS, but focused on two kinds of filters for the initial alignment of an integrated strapdown inertial navigation system (SINS). One method is based on the Kalman filter (KF), and the other is based on the robust filter. Simulation results showed that the filter provides a quick transient response and a little more accurate estimate than KF, given substantial process noise or unknown noise statistics. So the robust filter is an effective and useful method for initial alignment of SINS. This research should make the use of SINS more popular, and is also a step for further research. 相似文献
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LI Qing-fen JIN Guo and WANG Yan-bo School of Mechanical Electrical Engineering Harbin Engineering University Harbin China 《船舶与海洋工程学报》2005,(1)
1INTRODUCTION Crackopeningdisplacement(COD)andtheJ in tegralastwoimportantfracture characterizingparame tersinelastic plasticfracturemechanics,arealready welldevelopedandusedinindustrialapplications.However,deeplycrackedstandardlaboratory specimenwhichhasahighlevelofconstraintmaynot alwaysberepresentativeofthosefoundinstructural components.Structuralcomponentsoftenexhibitcom parativelyshallowandsurface breaking,andtheplas ticflowassociatedwiththemreachesthesurfaceofthe component.Inthisca… 相似文献
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LI Qing-fen ZHENG Wei and SHU Hai-sheng School of Mechanical Electrical Engineering Harbin Engineering University Harbin China 《船舶与海洋工程学报》2005,(3)
In partⅠandⅡof this series, experimental investigation in both EPFM and LEFM had been discussed. In this part, further theoretical analysis is given. The theoretical development of Two Parameter Fracture Mechanics by Hancock etc, has rationalized our experimental results. This method can be applied to engineering practice, and will allow the advantage of enhanced toughness for specimens with low levels of constraint to be taken into account for defect assessment. 相似文献
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Wei Zhang Chao Wu Wenshan Yang Shanshan Xu Shaofei Ren . China Ship Development Design Center Wuhan China . College of Shipbuilding Engineering Harbin Engineering University Harbin China 《船舶与海洋工程学报》2011,(3)
Due to the unique structural mode and material property of a composite sandwich plate, related research such as fragment impact resistance of a composite mast is short of publication and urgent in this field. In this paper, the commonly accepted sandwich core board theory was modified. Damage caused by a fragment attack was simulated onto a sandwich plate model built with solid and shell elements. It was shown that shear failure and vast matrix cracking are the main reasons for outer coat damage, and tensio... 相似文献
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水下爆炸对舰船结构损伤特征研究综述 总被引:2,自引:0,他引:2
鱼雷、水雷等水中兵器是舰船生命力的主要威胁之一。舰船水下爆炸已成为国际上研究的热点问题,虽然,近年来在舰船水下爆炸领域取得了一系列丰硕的研究成果,但迄今为止,水下爆炸冲击波、气泡运动及其对舰船结构的毁伤机理与规律仍未被完全揭示。针对此研究现状,首先分析了水下爆炸载荷特性,总结了水下爆炸对舰船结构的毁伤特性;其次,从应用研究和科学研究两方面,概括了舰船水下爆炸实验、理论分析以及数值方法方面的研究进展,总结了在基础研究方面存在的问题,旨在为舰船抗爆抗冲击相关研究提供参考。 相似文献
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前轮定位角对汽车转向回正作用的影响 总被引:6,自引:1,他引:6
利用数学方法,通过将前悬挂系统简化为相关杆系,论述了车轮外倾角、主销内倾角和后倾角以及转向轮转角改变时对汽车转向回正作用的影响,并求出了使汽车具有转向回正作用时,上述有关角度之间的数学关系。 相似文献
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哈尔滨铁路局哈尔滨东站 《铁道货运》2006,(1):39-42
为落实铁道部危险品运输专项整治的要求,哈尔滨东站结合自身特点,创新管理,发挥科技优势,使危险货物运输专项整治卓有成效。同时完善制度建设,创新培训手段,加强职工素质培养,为安全生产提供制度和人力保障。 相似文献