• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Vehicle aerodynamics, 2009 >Analysis of a Vehicle's Longitudinal Response to an Unsteady Wind Environment
【24h】

Analysis of a Vehicle's Longitudinal Response to an Unsteady Wind Environment

机译：车辆对非稳态风环境的纵向响应分析

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In a preceding paper an on-road investigation of the longitudinal aerodynamic response of a vehicle to ambient wind was presented. That study resulted in a frequency-dependent response function with a distinctive maximum within the range of the natural frequency of the vehicle on its suspension system. This finding raised the question as to whether the horizontal response of a car's deceleration to wind gusts is associated with or caused by the suspension's natural frequency. The objective of the present work is an attempt to shed some light on this question by the investigation of both deceleration and pitch angle fluctuations in additional on-road experiments. Both vehicle velocity and total airspeed in the driving direction and the pitch angle are recorded by independent data acquisition systems during a set of coastdown experiments. The deceleration data and the vehicle's response to the airspeed fluctuations are derived by differentiation of its velocity-time history and numerical filtering techniques. The experiments reveal a cause-and-effect relation between wind gusts and pitch motion that is additionally supported by model calculations. The study results in frequency-dependent longitudinal vehicle response and pitch angle response functions. Both functions show distinctive maxima, which are clearly separated from each other. This finding implicates that the resonance in the longitudinal vehicle response is caused by an aerodynamic effect.
机译：在先前的论文中，对车辆对环境风的纵向空气动力响应进行了公路研究。该研究得出了频率相关的响应函数，该函数在其悬架系统上的车辆固有频率范围内具有明显的最大值。这一发现提出了一个问题，即汽车减速对阵风的水平响应是否与悬架的固有频率相关或由其引起。本工作的目的是通过研究附加的道路实验中的减速度和俯仰角波动来试图阐明这个问题。在一组滑行实验期间，由独立的数据采集系统记录了行驶方向上的车速和总空速以及俯仰角。减速数据和车辆对空速波动的响应是通过区分速度-时间历史和数值滤波技术得出的。实验表明，阵风与俯仰运动之间的因果关系得到了模型计算的进一步支持。该研究得出了频率相关的纵向车辆响应和俯仰角响应函数。两种功能均显示出独特的最大值，这些最大值彼此明显分开。该发现暗示车辆纵向响应中的共振是由空气动力效应引起的。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号