【摘要】 现代试验模态分析技术,是近年来迅速发展起来的一种结构动态分析的先进技术,本文将此技术应用到拖拉机驾驶室的动态分析中,通过对驾驶室的伪随机信号的激励,测取驾驶室114个点的加速度信号,由HP-5423A模态分析仪识别出模态参数,并显示振型图,迅速地掌握其动态特性。然后针对驾驶室室内噪声偏高问题,进行了结构修改,达到了减振降噪目的。更多还原

【Abstract】 Technology of experimental modal analysis is an advanced one which has been, newly developed for structural dynamic analysis. This paper has applied this technology for dynamic analysis of tractor cab.With pseudo-random signal,the tractor cab was excited, then vibration acceleration at 193 points were measured. By means of the dynamic structural analyzer HP-5423A, modal parameters are identified. Finally, these parameters can be used to improrve the besign of the cab.更多还原