共查询到19条相似文献,搜索用时 46 毫秒
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空调管路系统的振动分析 总被引:1,自引:0,他引:1
针对空调管路的振动问题,以某空调管路为研究对象,建立了该空调管路的有限元计算模型,并基于振动结构模态分析理论分析了该管路的振动模态特性。以模态分析结果为依据,研究了管路壁厚及阻尼配重对管路振动模态的影响,提出空调管路结构设计的建议,从而避免管路因振动而产生破裂,导致制冷剂泄露的事故。 相似文献
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某柴油车在行驶一定里程后,其空调排气管的某弯管出现了裂纹失效现象.为了探究失效原因,预测管路疲劳寿命,建立了柴油车空调排气管分析模型,对空调排气管进行模态分析;采集试验车路跑过程中输入空调排气管的加速度信号,经处理转化为载荷功率谱;进行随机振动分析,发现理论分析的失效位置与实际损坏位置基本吻合;依据随机振动分析的结果,应用三区间法对管路的疲劳寿命进行计算,验证了理论计算的可靠性;最后,对管路结构进行优化,减小了结构的最大应力,为该柴油车空调排气管的生产设计提供了参考. 相似文献
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某柴油车在行驶一定里程后,其空调排气管的某弯管出现了裂纹失效现象.为了探究失效原因,预测管路疲劳寿命,建立了柴油车空调排气管分析模型,对空调排气管进行模态分析;采集试验车路跑过程中输入空调排气管的加速度信号,经处理转化为载荷功率谱;进行随机振动分析,发现理论分析的失效位置与实际损坏位置基本吻合;依据随机振动分析的结果,应用三区间法对管路的疲劳寿命进行计算,验证了理论计算的可靠性;最后,对管路结构进行优化,减小了结构的最大应力,为该柴油车空调排气管的生产设计提供了参考. 相似文献
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空调室外机管路在工作时会产生相应的振动,管路在长期振动下容易断裂导致冷媒的泄漏。为了解管路的固有特性,本文对压缩机管路模型进行了模态分析,并研究了在改变回气管和排气管的结构下,压缩机管路系统固有频率的相应变化值。通过分析可知,排气管结构的改变对压缩机管路系统固有频率值的影响较为明显,达到了减振和避振的目的。 相似文献
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分析面向复杂工况的暖通空调管路动力学特性。采用ANSYS软件建立暖通空调管路的有限元模型,通过数值模拟的方法进行管路的双向流固耦合计算,根据计算结果分析面向复杂工况的暖通空调管路动力学特性。管路的流固耦合振动位移随管路材料硬度的增加而下降;当管路进口压力为连续脉冲波动时,较进口压力为常数时的流固耦合振动现象更明显。在暖通空调管路设计与优化中,可以通过适当增大管路材料的硬度,并调节管路进口压力保持在一个较低的水平,来提升管路的抗振性。 相似文献
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空调压缩机工作时会间歇性的吸气和排气,这将会导致压缩机产生相应的振动,而振动将会传递到与之相连的管路上,管路在长期振动下容易断裂导致冷媒的泄漏。通过有限元仿真软件对管路系统进行了模态分析和谐响应分析,并通过增加消声器和增加管路壁厚的方法对管路进行减振分析,通过优化管路系统降低管路振幅,提高管路使用寿命。 相似文献
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基于国内某空调制造企业的产品研发实践,对目前空调器配管几种主要的断裂失效形式进行了总结。分析了失效发生的原因,提出了相应的解决思路。通过案例对配管断裂的故障分析和应对策略进行了讨论,相关分析结论对提高配管工作可靠性具有一定的工程指导意义。 相似文献
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Experimental analysis for reducing refrigerant-induced noise of 4-way cassette type air conditioner 总被引:1,自引:0,他引:1
Hyung Suk Han Weui Bong Jeong Shigeo Aoyama Jin Yong Mo 《Journal of Mechanical Science and Technology》2009,23(5):1456-1467
Various refrigerant flow patterns can produce a range of noise types according to their cycle conditions. Consequently, the
identification of flow patterns in a tube is crucial to reducing refrigerant-induced noise. Because of the obstacles involved
in identifying them accurately by experiment, in this paper, these flow patterns are estimated from the flow pattern map.
Working from the assumption that the refrigerant-induced noise for an air conditioner in the heating mode comes from slug
flow in the condenser-outlet pipe, the reduction of refrigerant-induced noise by avoiding slug flow in a tube is examined.
To fully understand the conditions under which the refrigerant-induced noise occurs, cycle simulator equipment for an outdoor
unit is developed. With this cycle simulator, noise tests of 4-way cassette type indoor units are performed under the conditions
that the refrigerant-induced noise occurs. Increasing the mass flux in a tube by reducing the diameter of the condenser-outlet
pipe can avoid slug flow, and the refrigerant-induced noise can therefore be reduced. The results of the cycle simulator can
be verified with an outdoor unit 5HP system multi air conditioner and the results are well in line with simulator results.
This paper was recommended for publication in revised form by Associate Editor Yeon June Kang
Hyung-Suk Han received a B.S. degree in Production and Mechanical Engineering from Pusan National University in 1996. He then went on to
receive his M.S. and Ph.D. degrees from Pusan National University in 1998 and 2007, respectively. Dr. Han is currently a Senior
Researcher at Defense Agency of Technology and Quality, Pusan, Korea. He is currently serving as a Co-Researcher of Noise
and Vibration Analysis Laboratory in Pusan National University. Dr. Han’s research interests are in the area of the mechanical
applications of noise and vibration including refrigerant-induced noise.
Wei-Bong Jeong received a B.S. degree in Mechanical Engineering from Seoul National University in 1978. He then went on to receive his M.S.
and Ph.D. degrees from KAIST in 1980 and from Tokyo Institute of Technology in 1990, respectively. Dr. Jeong is currently
a Professor at the Mechanical Engineering at Pusan National University in Busan, Korea. He is currently serving as an Academic
Director of the Korean Society for Noise and Vibration Engineering. Dr. Jeong’s research interests are in the area of the
measurement and signal processing of noise and vibration, finite/boundary element programming of noise and vibration, fluid-structure
interactions and acoustic-structure interactions. 相似文献
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一种新型管外旋转机构的设计研究 总被引:4,自引:0,他引:4
基于挠性体摩擦传动的欧拉公式和链传动理论,提出并设计了应用于X射线检测实时成像管道机器人图像采集系统中的一种新型管外同步旋转机构,并给出了管外同步旋转机构旋转平稳性和承载能力主要影响因素及其定量分析,完成了样机的制造。该机构满足了X射线实时成像检测技术的工艺要求。 相似文献
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