流体引起的空调管路振动分析与实验研究

发布时间：2018-05-28 07:37

本文选题：空调 + 管道振动　；参考：《振动与冲击》2017年01期

【摘要】：结合流体动力学和结构动力学分析了空调室外机管路系统由流体引起的振动问题。采用有限元方法建立了管路系统的动力学模型,并通过模态试验验证了模型的准确性。使用流体动力学方法分析了管内流场,获得管道内壁的表面压力,并以压力作为激励,结合实验验证后的管路动力学模型进行了谐响应分析。通过管路ODS(Operational Deflection Shapes)实验,验证了由流体引起的管路振动分析方法的可靠性和有效性。研究表明:管路理论模态分析与实验结果基本吻合,确保建立的动力学模型的准确性,为后续分析的准确度提供了基础;管路振动分析与ODS实验对比结果在低频段理论与实验吻合较好,而在高频段误差较大。分析了误差产生的原因,为后续研究指明了方向。
[Abstract]:In this paper, the fluid induced vibration of outdoor air conditioning system is analyzed in combination with hydrodynamics and structural dynamics. The dynamic model of pipeline system is established by finite element method, and the accuracy of the model is verified by modal test. The hydrodynamic method is used to analyze the flow field in the pipe, and the surface pressure of the inner wall of the pipe is obtained. The pressure is used as the excitation, and the harmonic response analysis is carried out in combination with the experimental verification of the dynamic model of the pipeline. The reliability and validity of the fluid induced vibration analysis method are verified by the pipe ODS(Operational Deflection experiments. The results show that the theoretical modal analysis is in good agreement with the experimental results, which ensures the accuracy of the established dynamic model and provides the basis for the accuracy of subsequent analysis. The results of pipeline vibration analysis and ODS experiment are in good agreement with the experiment in low frequency band, but the error is large in high frequency band. The causes of the error are analyzed, and the direction of the following research is pointed out.
【作者单位】：昆明理工大学机电工程学院振动噪声监测与控制研究所;四川长虹空调有限公司;
【基金】：国家自然科学基金地区基金(51465022)
【分类号】：TB657.2;TB53

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