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《Sichuan Building Science》 2013-01
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Vibration test and shock absorption research on medium-speed mill-foundation coupled system(Ⅰ)——Vibration test in site

PENG Yiliang1,PENG Zhifeng2,LIU Yongzhou1,ZHANG Fengjian2,WEI Xiabing1(1.Henan Electric Power Survey and Design Institute,Zhengzhou 450007,China; 2.School of Civil Engineering,Xi'an University of Architecture & Technology,Xi'an 710055,China)  
Spring vibration-isolated foundation is used for the medium-speed mill for reducing the impact of equipment disturbing force on the main plant in thermal power plant.In order to evaluate rationally the vibration performance of medium-speed mill with spring vibration-isolated foundation,eight mills in five power plants including one mill with non-isolated vibration foundation are tested.In order to consider the dynamic interaction between medium-speed mill and foundation,the vibration displacement and acceleration of upper and lower bedplates of foundations and equipment bodies are measured.According to the test results the vibration safety of the mills is evaluated and the causes of vibration overrun for mill foundation are analyzed.The study shows that the vibration displacement of medium-speed mill with spring vibration-isolated foundation meets the code requirements,but the vibration displacement of equipment body is larger.The vibration displacement of equipment body should be controlled by limiting the vibration displacement of foundation platform in design.
【Fund】: 国家自然科学基金项目(50908186)
【CateGory Index】: TM621
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