小型森林消防车振动特性试验
发布时间：2018-10-22 10:11
【摘要】：采用室内道路模拟技术,利用动态信号分析系统采集空载、50%、75%和95%4种不同的充水工况下车架纵向、罐体垂向及横向的加速度信号,计算加速度均方根值,并利用傅里叶变换进行频域分析来识别振动特性,从而研究流固耦合运动对该消防车产生的振动影响。结果表明,在林区山地路况作业时,该小型消防车水罐振动明显,且在流固耦合的作用下,该消防车水罐3个轴向上的振动频率均变化明显,充水工况较空载时的振动频率更快,且3种不同充水工况的振动频率存在差异。根据试验结果,建议该消防车在林区作业时,装水量应控制在95%左右,避免半载情况下的流固耦合运动对整车稳定性造成较大影响。
[Abstract]:Using indoor road simulation technology, using dynamic signal analysis system to collect acceleration signals in longitudinal, vertical and lateral directions of the frame under four different water filling conditions: 50% and 95%, and to calculate the root mean square (RMS) of acceleration. The frequency domain analysis of Fourier transform is used to identify the vibration characteristics, and the effect of fluid-solid coupling motion on the vibration of the fire engine is studied. The results show that the vibration of the small fire truck water tank is obvious when the mountain road condition is in the forest area, and under the action of fluid-solid coupling, the vibration frequencies of the three axial directions of the fire truck water tank all change obviously. The vibration frequency of water filling condition is faster than that of no load, and the vibration frequency of three different water filling conditions is different. According to the test results, it is suggested that the loading capacity of the fire engine should be controlled at about 95% when it is operating in the forest area, so as to avoid the fluid-solid coupling movement under half load which will greatly affect the stability of the vehicle.
【作者单位】： 北京林业大学工学院;
【基金】：北京市支持中央在京高校共建项目(2009)
【分类号】：U467;U469.68
本文编号：2286877
[Abstract]:Using indoor road simulation technology, using dynamic signal analysis system to collect acceleration signals in longitudinal, vertical and lateral directions of the frame under four different water filling conditions: 50% and 95%, and to calculate the root mean square (RMS) of acceleration. The frequency domain analysis of Fourier transform is used to identify the vibration characteristics, and the effect of fluid-solid coupling motion on the vibration of the fire engine is studied. The results show that the vibration of the small fire truck water tank is obvious when the mountain road condition is in the forest area, and under the action of fluid-solid coupling, the vibration frequencies of the three axial directions of the fire truck water tank all change obviously. The vibration frequency of water filling condition is faster than that of no load, and the vibration frequency of three different water filling conditions is different. According to the test results, it is suggested that the loading capacity of the fire engine should be controlled at about 95% when it is operating in the forest area, so as to avoid the fluid-solid coupling movement under half load which will greatly affect the stability of the vehicle.
【作者单位】： 北京林业大学工学院;
【基金】：北京市支持中央在京高校共建项目(2009)
【分类号】：U467;U469.68
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