基于弯扭组合模型的压缩机曲轴扭振分析
发布时间:2018-11-14 12:52
【摘要】:曲轴作为压缩机的关键部件,其扭转振动是引起压缩机共振故障的重要因素。针对大型往复式压缩机曲轴复杂的结构特点和曲轴扭转振动的实际情况,提出具有连续分布质量的等截面轴和弯曲梁相组合的曲轴扭振模型,以曲柄臂和等截面轴的扭转振动微分方程为基础,推导给出了计算曲轴扭振固有频率的状态方程。大型曲轴实例分析结果表明,此方法的计算精度优于传统的集中质量模型、阶梯轴模型,非常接近有限元结果,适合大型往复式压缩机轴系的快速设计计算。
[Abstract]:As the key component of compressor, the torsional vibration of crankshaft is an important factor to cause the resonant fault of compressor. In view of the complex structural characteristics of crankshaft of large reciprocating compressor and the actual situation of torsional vibration of crankshaft, a crankshaft torsional vibration model with continuous distribution mass is proposed. Based on the torsional vibration differential equations of crank arm and iso-section axis, the state equation of state for calculating the natural frequency of torsional vibration of crankshaft is derived. The analysis results of large crankshaft examples show that the accuracy of this method is better than that of the traditional centralized mass model and stepped shaft model, which is very close to the finite element results, and is suitable for the rapid design and calculation of the shafting of large reciprocating compressors.
【作者单位】: 华东理工大学机械与动力工程学院;
【分类号】:TH45
本文编号:2331207
[Abstract]:As the key component of compressor, the torsional vibration of crankshaft is an important factor to cause the resonant fault of compressor. In view of the complex structural characteristics of crankshaft of large reciprocating compressor and the actual situation of torsional vibration of crankshaft, a crankshaft torsional vibration model with continuous distribution mass is proposed. Based on the torsional vibration differential equations of crank arm and iso-section axis, the state equation of state for calculating the natural frequency of torsional vibration of crankshaft is derived. The analysis results of large crankshaft examples show that the accuracy of this method is better than that of the traditional centralized mass model and stepped shaft model, which is very close to the finite element results, and is suitable for the rapid design and calculation of the shafting of large reciprocating compressors.
【作者单位】: 华东理工大学机械与动力工程学院;
【分类号】:TH45
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