典型路面激励下的工程专用自卸车车架动态响应研究

摘要

采用固有模态分析与具有自适应特征的经验模态分解EMD算法相结合的方法，对采集到的车架关键点振动信号进行重构。应用信号处理方法从重构后的信号中有效提取车架的动态特征，分析结果表明，该自卸车车架在工地路面激励下易产生低频共振，严重影响整车性能和使用寿命，需要对车架结构进行进一步优化。%We combine the inherent modal analysis with experience modal decomposition EMD algorithm with self-adaptation characteristic to reconstruct the key point vibration signal of frame. We use the signal processing method to effectively extract frame dynamic characteristics from the reconstructed signals. The analysis results show that the dump truck frame easily produces low frequency resonance under the site road excitation, which will seriously affect the performance and service life of the vehicle, therefore optimization of this vehicle frame is needed.