In order to analyze the fatigue of concrete pump trucks,a data-driven method of compi-ling fatigue load spectra for concrete pump truck booms was proposed by utilizing big data analysis technology.The typical operating posture of concrete pump trucks was defined by analyzing the angle of boom inclination and pinch angle.Then,load information was collected according to the selected typical operating posture,and data pre-processing was performed on the collected raw signals to im-prove the data quality and make the fatigue load spectrum more reliable afterwards.A parametric method was used to estimate and extrapolate the amplitude distribution of the tested load spectra to obtain the load spectra under the whole life cycle,and the load spectra were strengthened for fatigue verification.The reliability and engineering practicability of the proposed method were verified by con-ducting tests on a large amount of data collected from 300 pump trucks of a certain model.The results provide some references for the fatigue load spectrum preparation of the multi-joint boom structure of concrete pump trucks.
关键词
混凝土泵车/臂架结构/载荷谱/疲劳试验
Key words
concrete pump truck/boom structure/load spectrum/fatigue test
维普
万方数据