司机操作特性对挖掘机主泵压力的载荷特性的影响

载荷谱是挖掘机系统和部件寿命预测和可靠性分析的数据基础,载荷特性的差异对寿命预测和可靠性分析结果影响很大。司机操作特性是影响载荷特性,特别是载荷集中位置和波动程度的重要因素之一。通过采集3名司机操作下的挖掘机液压系统主泵压力载荷数据,并进行载荷处理和载荷分段提取挖掘段载荷,得到每名司机操作下载荷数据的均值和标准差,通过拟合图法和K-S检验法验证载荷特征值的正态分布特性,并基于显著性差异理论分析了3名司机操作下载荷特性的差异性,证明了司机操作特性对载荷特性影响的客观性,为重视工程机械领域人为因素对载荷特性的影响提供了理论依据。

Influence of Operating Characteristics on Load Characteristics of Main Pump Pressure of an Excavator

Load spectrum is the data base for life prediction and reliability analysis of the systems and components in excavators, and the differences between load characteristics well affect the prediction and analysis results. Operating characteristics of operators are important factors that affect the load characteristics, especially the load centralized locations and load fluctuations. Load of the main pump pressure in the hydraulic system of an excavator was tested under the operations of three different operators. After the load processing and segments, load of the digging section was extracted, then the mean value and standard deviation of the load with different operators were obtained. Based on the fitting chart and K-S testing method, the mean value and standard deviation were proved to fit the normal distribution, and the otherness of the characteristic value between different operators was analyzed with the significant difference theory. It testifies the objectivity of the influence of the operating characteristics on the load characteristics, which provides theoretical foundations to pay attention to the effects of human factors on load characteristics in the field of construction machinery.