摘要
针对硬岩掘进机(tunnel boring machine,TBM)强振动工况,分析引起泵轴疲劳失效的两种机理:载荷与材料性能变化.建立了泵轴在强振动下的受力仿真模型,仿真得到泵轴稳态受力幅值随频率及振幅均呈线性增加.根据经验数据,获得不同工况下的S-N曲线修正模型.建立泵轴的有限元模型,加载不同工况的载荷与材料参数,得到振动参数影响泵轴疲劳寿命的规律.结果表明:当振幅小于3 mm,频率小于20 Hz时,泵轴总能满足对寿命要求;当振幅大于4.8 mm时,不能满足其寿命要求;当频率为10 Hz时,能满足泵轴疲劳寿命的最大振幅为4.3 mm.
In view of the fact that TBM works under vibration environment, this paper has analyzed two reasons of fatigue of the pump shaft under vibration： the change of loads and the material performance. We build the model of the vane pump by MATLAB/SIMULINK is built. The results of simulation show that the stable force on pump shaft has active linescaple relationship with the frequency and amplitude. According to the empirical data, the S-N curve in different situation was obtained. And the finite element model of the shaft was established. Adding different loads and the material parameters on the model, the influence rules by vibration are obtained. The results indicate that： when the amplitude is below 3 mm and the frequency is below 20 Hz, it can always satisfy the request of fatigue life. It cannot satisfy the request of fatigue life when the amplitude is above 4.8 ram. When the frequency is 10 Hz, the maximum amplitude to satisfy the fatigue life of shaft is 4.3 mm.
出处
《郑州大学学报（工学版）》
CAS
北大核心
2016年第4期6-10,共5页
Journal of Zhengzhou University（Engineering Science）
基金
国家重点基础研究发展计划资助项目(2013CB035404)
