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    王潆旋, 姚立红, 阚江明. 伐根机车架把手的试验模态与有限元模态分析[J]. 北京林业大学学报, 2016, 38(2): 124-130. DOI: 10.13332/j.1000-1522.20150225
    引用本文: 王潆旋, 姚立红, 阚江明. 伐根机车架把手的试验模态与有限元模态分析[J]. 北京林业大学学报, 2016, 38(2): 124-130. DOI: 10.13332/j.1000-1522.20150225
    WANG Ying-xuan, YAO Li-hong, KAN Jiang-ming. Analysis of test model and finite element model of the frame and handle of stump cutting machine[J]. Journal of Beijing Forestry University, 2016, 38(2): 124-130. DOI: 10.13332/j.1000-1522.20150225
    Citation: WANG Ying-xuan, YAO Li-hong, KAN Jiang-ming. Analysis of test model and finite element model of the frame and handle of stump cutting machine[J]. Journal of Beijing Forestry University, 2016, 38(2): 124-130. DOI: 10.13332/j.1000-1522.20150225

    伐根机车架把手的试验模态与有限元模态分析

    Analysis of test model and finite element model of the frame and handle of stump cutting machine

    • 摘要: 为获得伐根机车架和操作把手的振动特性,建立合理的车架把手仿真模型,用专业的模态测试系统结合后处理软件以及Ansys Workbench有限元分析软件,对伐根机的车架把手机构进行试验模态和有限元模态分析,并对两者的结果进行对比。结果表明:试验模态与有限元模态分析得到的结果基本吻合,通过2种方法获得的前6阶模态的固有频率误差在10%以内,各阶振型基本相同,说明二者都能较好地反映实际结构的振动特性;简化的有限元模型准确性高,可作为静力学和动力学分析的基本模型;伐根机车架前端与刀盘轴连接处以及把手手持部分易发生较大振幅,建议采取添加隔振材料、变刚性连接为弹性连接、增大易损部位的抗疲劳强度等措施实现隔振和减振。

       

      Abstract: The objectives of this study were to clarify the vibration characteristics of the frame and operation handle of the stump cutting machine, and to establish a reasonable simulation model. Using the professional modal testing system with post-processing software and CAE software (Ansys Workbench), we carried out model test and finite element analysis of the frame and operation handle, and compared their results. The results of model test and finite element analysis can well match each other. For both methods, the error of natural frequency in the first six stages can be controlled within 10%, and the mode of vibration for each stage is basically the same, suggesting that the results of the model test and the finite element analysis can well reflect the actual characteristics of structural vibration. The finite element mode built for the frame and operation handle has a high credibility that it can be used trustingly in statics and dynamics analyses. The link part between the front of the frame and the cutter head shaft, as well as the holding part in the handle, are prone to large amplitude of vibration. Measures like adding vibration isolation material, changing rigid connection to elastic one, and increasing the fatigue strength of vulnerable parts, can be taken to isolate and decrease vibration.

       

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