摘要
针对掘锚机截割机构动态载荷难以直接测量的技术难题,提出一种基于振动加速度能量与应变信号融合的间接识别方法。通过三向应变测试获取主应力时程曲线,结合振动能量特征提取构建载荷应力映射模型。实验表明:截割作业阶段(0~6 s)主应力峰值达14.2 MPa,振动能量密度幅值0.921m^(2)/s^(5),两者衰减同步率达96.5%;建立的线性模型在12 MPa应力范围内平均误差6.8%,验证了机械载荷与振动响应的动态耦合机制。该方法为掘进装备状态监测提供了非接触式测量新方案。
To address the technical challenge of direct measurement of dynamic loads on cutting mechanism of anchor excavator,proposed an indirect identification method integrating vibration acceleration energy and strain signals.The principal stress time-history curves were obtained through triaxial strain testing,and a load-stress mapping model was constructed by combining vibration energy feature extraction.Experimental results show that during the cutting phase(0~6 s),the peak principal stress reaches 14.2 MPa with vibration energy density amplitude of 0.921 m^(2)/s^(5),exhibiting 96.5%synchronous attenuation.The established linear model demonstrates an average error of 6.8%within 12 MPa stress range,validating the dynamic coupling mechanism between mechanical loads and vibration responses.This method provides a novel non-contact measurement solution for excavation equipment condition monitoring.
作者
叶竹刚
Ye Zhugang(Inner Mongolia Branch,Shanxi Tiandi Coal Mining Machinery Co.,Ltd.,Ordos 017209,China)
出处
《煤矿机械》
2026年第3期71-74,共4页
Coal Mine Machinery
关键词
掘锚机
截割机构
动态载荷识别
振动能量
应变分析
anchor excavator
cutting mechanism
dynamic load identification
vibration energy
strain analysis
