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国家自然科学基金(51275265)

作品数:5 被引量:38H指数:3
相关作者:危银涛王静周福强刘哲更多>>
相关机构:清华大学易瑞博科技(北京)有限公司更多>>
发文基金:国家自然科学基金国家重点实验室开放基金更多>>
相关领域:交通运输工程机械工程理学化学工程更多>>

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5 条 记 录,以下是 1-10
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Analysis of a rheological model of a Conveyor belt
The development of Conveyor belt systems is nowadays demanding for new mathematical models to analyze and pred...
危银涛李勇
关键词:CDIKELVIN
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考虑面外振动的轮胎三维环模型被引量:12
2016年
提出了包含面外扭转和面外弯曲振动的三维环模型,并应用于卡车子午线轮胎振动模态分析。在综述轮胎环模型发展的基础上,考虑了大变形应变和非线性应变项、面内面外弯曲和面外扭转三维位移模式,修正文献中的轮胎初始应力和气压功表达式,利用Hamilton变分原理首次建立了三维轮胎环模型的动力学控制方程,并利用模态展开技术得到了三维环模型面内和面外振动固有频率的解析解。该解析解首次建立了轮胎物理参数和轮胎三维振动固有频率之间的解析表达式,为轮胎的动态设计提供了理论指导。为验证三维环模型的准确性,对比了环模型分析、有限元模型和实验模态分析的结果,发现三者之间吻合良好,这证明文中建立的轮胎三维环模型的可靠性和准确性,能抓住子午线轮胎振动的本质规律。
危银涛刘哲周福强赵崇雷
关键词:轮胎振动模态分析子午线轮胎
Influence of Tire Dynamics on Slip Ratio Estimation of Independent Driving Wheel System被引量:4
2014年
The independent driving wheel system, which is composed of in-wheel permanent magnet synchronous motor(I-PMSM) and tire, is more convenient to estimate the slip ratio because the rotary speed of the rotor can be accurately measured. However, the ring speed of the tire ring doesn’t equal to the rotor speed considering the tire deformation. For this reason, a deformable tire and a detailed I-PMSM are modeled by using Matlab/Simulink. Moreover, the tire/road contact interface(a slippery road) is accurately described by the non-linear relaxation length-based model and the Magic Formula pragmatic model. Based on the relatively accurate model, the error of slip ratio estimated by the rotor rotary speed is analyzed in both time and frequency domains when a quarter car is started by the I-PMSM with a definite target torque input curve. In addition, the natural frequencies(NFs) of the driving wheel system with variable parameters are illustrated to present the relationship between the slip ratio estimation error and the NF. According to this relationship, a low-pass filter, whose cut-off frequency corresponds to the NF, is proposed to eliminate the error in the estimated slip ratio. The analysis, concerning the effect of the driving wheel parameters and road conditions on slip ratio estimation, shows that the peak estimation error can be reduced up to 75% when the LPF is adopted. The robustness and effectiveness of the LPF are therefore validated. This paper builds up the deformable tire model and the detailed I-PMSM models, and analyzes the effect of the driving wheel parameters and road conditions on slip ratio estimation.
LI JianqiuSONG ZiyouWEI YintaoOUYANG Minggao
基于开裂应变能密度方法的橡胶疲劳寿命预测
本文基于开裂应变能密度方法和Endurica橡胶疲劳软件,成功预测处于动态单轴拉伸状态下的矩形橡胶试件的疲劳寿命,基于开裂应变能密度方法,不仅可以成功预测疲劳寿命,而且可以预测开裂位置和开裂方向。
金状兵危银涛李勇
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载重子午线轮胎滚动振动噪声仿真技术研究
研究了一种预测轮胎滚动振动噪声的新方法,提出用混合的拉格朗日-欧拉方法来解决瞬时变动的拉格朗日网格上的振动信息向欧拉网格上映射的数据转化问题。首先进行带花纹轮胎的瞬态滚动计算,然后提取外表面的节点加速度,采用混合的拉格朗...
冯希金危银涛朱作勇项大兵
关键词:载重子午线轮胎振动噪声
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管带式输送机启动动力学分析
本文根据管带式输送机设计需求,采用有限元方法对大长度带式输送机进行动力学建模,并利用MATLAB对该动力学模型进行求解计算,并重点分析了不同启动条件对输送机动力学特性的影响。
项大兵危银涛李勇
关键词:MATLAB动力学分析
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磁流变减震器滞回特性魔术公式模型
本文的目的是发展一种新的、简单通用的磁流变减震器模型,以适用于半主动悬架的动力学分析与控制。通过对磁流变减震器进行运动学和流变学分析,将减震器的作用力分为剪切项、粘性项、摩擦项、弹性项和惯性项。对于其中最重要和最复杂的剪...
薛兵李雪冰危银涛
关键词:磁流变液减震器滞回特性半主动悬架
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Analysis of coast-by noise of heavy truck tires被引量:1
2016年
Heavy truck tires are one of ihe rnam sources of road traffic noise. However, the mecha- nism and plopagation of the noise generated by these tires have not been systematically investigated 7o determine the noise of heavy truck tires with different structures and patterns, and to analyze the coraelation between the indoor tire noise and coast-by tire noise, an integrated tire indoor noise test and a coast-by noise test were designed and successfully implemented. The indoor test was conducted on a drum inside a semi- anechoic chamber to simultaneously measure the near field and far field noise of the tires. The outdoor measurements were carried out using a coast-by test on the new ISO 10844 surface. A formula for quantitative analysis with appropriate corrections was developed to analyze the data with reasonable errors, which can be used to predict the coast-by noise through the indool tire noise test accurately and effectively. The analysis shows that when trying to build the relationship between indoor and outdoor heavy truck tire noise, care should be taken to differentiate the tires with a load capacity index in excess of 121 and without any dual fitting indication from ordinary tires, due to the specified test procedure.
Yintao WeiYongbao YangYalong ChenHao WangDabing Xiangzhichao Li
基于Matlab/Simulink的PMSM磁场定向控制算法的设计与应用(英文)被引量:3
2014年
随着微处理器的快速发展,永磁同步电动机(PMSM)驱动系统广泛应用于需要高精度控制的工业领域。为了克服设计PMSM系统的复杂和费时的局限性,提出一种PMSM速度控制的磁场定向控制算法(FOC)。该算法在HATLAB/Simulink中实现,利用其中的标准模块,利用Matlab的自动代码生成工具,可在DSP微处理器中实现。采用了STM32F4微控制器。为处理电流反馈信号,引入主动式电流读取误差补偿器。利用由3个双向5-A Hall传感器执行的模数转换器,使信号精度达10mA、10Bit。在0~2000r/min范围内,试验了带传感器的PMSM。对期望速度的阶跃响应实验表明:整个系统的动态性能和稳态性能良好。
Pawel StojaczykDawid Woroch洪波危银涛
关键词:SIMULINK自动代码生成
轨道车辆空气弹簧疲劳分析
利用基于开裂能理论的疲劳分析方法对空气弹簧进行寿命评估.借助有限元技术对带有附加气室的空气弹簧系统进行仿真,提取空气弹簧胶囊每个单元中心的应变历程,将应变历程代入开裂能计算公式计算每个单元中心所有可能开裂平面的开裂能峰值...
李志超; 李雪冰; 刘万强; 何园; 王昊; 丁智平; 危银涛;
关键词:空气弹簧有限元仿真
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