摘要
研究了一种钻锚机钻臂模态参数的精确提取方法,并通过仿真和实验对方法的有效性和可靠性进行了验证。实验结果表明,该方法能够从脉冲响应信号中高精度的提取结构的模态参数(模态频率、阻尼比),不受多阶模态响应信号叠加的影响,有效地解决了传统模态参数提取方法的不足。利用本方法获得的模态参数,为钻锚机钻臂有限元模型的更新与修正,为其动态特性的预估和优化设计提供了参考。
A novel method was proposed to identify the modal parameters of roof bolter' s drilling arm with high preci- sion. In order to verify this method, we made an experiment, and the results showed that the method had a good validity and reliability. The proposed method is less affected by mode superposition and can overcome the disadvantages of tra- ditional modal parameters identification method. Furthermore, the method can help to update the FEM model of roof bolter' s drilling arm and the identified modal parameters also provide basic data to further dynamic analysis and opti- mum design.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2012年第7期1239-1244,共6页
Journal of China Coal Society
关键词
钻锚机钻臂
模态参数提取
有限元模型修正
roof bolter' s drilling arm
modal paramenter identification
finite element model updating