碾压混凝土坝成层软弱结构水弹性试验模拟
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摘要
面向碾压混凝土坝流激振动问题精细化模拟研究的需要,总结了碾压混凝土坝成层结构的特性,并基于水弹性模型试验,对碾压混凝土坝的成层软弱结构模拟方法进行了研究,提出了带碾压成层结构水弹模型模拟的6条相似准则和3种碾压成层结构水弹模型的黏合模拟方式。基于频响函数原理,对5组模拟试件的冲击振动信号及频响函数进行分析,评估了不同模拟方式下试件的动力响应特性。结果表明:混凝土成层软弱结构采用由下至上分别为下层铣厚橡胶、硫化型橡胶黏合剂、低弹模薄层橡胶、硫化型橡胶黏合剂、上层铣厚橡胶的模拟方式,模拟结果符合理论规律。
This paper summarizes the features of the layered structure of the roller compacted concrete dam,which was needed for the fine simulation study of the flow-induced vibration of the roller compacted concrete dam.Besides,based on the hydroelastic model test,the simulation method of the layered weak structure of the roller compacted concrete dam is studied in depth,then six scaling criteria that the simulation of the hydroelastic model with rolled layered structure need to meet were presented,and three kinds of adhesion simulation methods of the layered structure are also put forward.Meanwhile,the vibration response signals and frequency response functions for five sets of simulated specimens are analyzed on account of the principle of frequency response function,and the dynamic response characteristics of specimens under different simulation methods are also evaluated.The simulation results show that the mode with materials of milling rubber,vulcanized rubber adhesive,thin low elastic modulus rubber,vulcanized rubber adhesive and milling rubber from the bottom to the top is in accordance with the theoretical laws.
This paper summarizes the features of the layered structure of the roller compacted concrete dam,which was needed for the fine simulation study of the flow-induced vibration of the roller compacted concrete dam.Besides,based on the hydroelastic model test,the simulation method of the layered weak structure of the roller compacted concrete dam is studied in depth,then six scaling criteria that the simulation of the hydroelastic model with rolled layered structure need to meet were presented,and three kinds of adhesion simulation methods of the layered structure are also put forward.Meanwhile,the vibration response signals and frequency response functions for five sets of simulated specimens are analyzed on account of the principle of frequency response function,and the dynamic response characteristics of specimens under different simulation methods are also evaluated.The simulation results show that the mode with materials of milling rubber,vulcanized rubber adhesive,thin low elastic modulus rubber,vulcanized rubber adhesive and milling rubber from the bottom to the top is in accordance with the theoretical laws.
引文
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[16]段虎明,秦树人,李宁.频率响应函数估计方法综述[J].振动与冲击,2008,27(5):48-52.Duan Huming,Qin Shuren,Li Ning.Measurement methods review for frequency response function[J].Journal of Vibration and Shock,2008,27(5):48-52.(in Chinese)
[17]曹坚.基于参数模型的频响函数估计方法[J].振动、测试与诊断,2011,31(1):70-73.Cao Jian.Estimation of frequency response function using parameter model[J].Journal of Vibration,Measurement&Diagnosis,2011,31(1):70-73.(in Chinese)
[18]Dobrowiecki T P,Schoukens J,Guillaume P.Optimized excitation signals for MIMO frequency response function measurements[J].IEEE Transactions on Instrumentation&Measurement,2006,55(6):2072-2079.
[2]Gu Chongshi,Song Jingxiang,Fang Haiting.Analysis model on gradual change principle of effect zones of layer face for RCCD[J].Applied Mathematics and Mechanics,2006,27(11):1335-1340.
[3]崔广涛,林继镛,彭新民,等.二滩拱坝泄洪振动水弹性模型研究[J].天津大学学报,1991(1):1-10.Cui Guangtao,Lin Jinyong,Peng Xinmin,et al.Hydroelastic model experimental syudy on ertan arch dam vibration by discharge flow[J].Journal of Tianjin University,1991(1):1-10.(in Chinese)
[4]练继建,崔广涛.水工结构水弹性模型模拟方法与应用[J].水利水电技术,2001(12):20-21.Lian Jijian,Cui Guangtao.Simulation method and application of hydraulic elasticity model of hydraulic structures[J].Water Resources and Hydropower Engineering,2001(12):20-21.(in Chinese)
[5]张林让,吴杰芳,曹晓丽,等.构皮滩拱坝坝身泄洪振动水弹性模型试验研究[J].长江科学院院报,2009(2):36-40.Zhang Linrang,Wu Jiefang,Cao Xiaoli,et al.Hydroelastic model test research on releasing flood vibration of arch dam for goupitan project[J].Journal of Yangtze River Scientific Research Institute,2009(2):36-40.(in Chinese)
[6]马斌,练继建,杨敏.大比尺高拱坝泄洪振动水弹性模型研究[J].中国工程科学,2008(11):23-29.Ma Bin,Lian Jijian,Yang Min.Hydroelastic model experimental study on large scale high arch dam vibration by discharge flow[J].Engineering Sciences,2008(11):23-29.(in Chinese)
[7]彭新民,王富强,杨敏,等.拉西瓦高拱坝水弹性模型基础确定的研究[J].中国农村水利水电,2005(5):72-74.Peng Xinmin,Wang Fuqiang,Yang Min,et al.Research on the hydro-elastic model basis of laxiwa high arch dam[J].China Rural Water and Hydropower,2005(5):72-74.(in Chinese)
[8]张仲卿.沙牌碾压混凝土拱坝仿真结构模型试验研究[J].水电站设计,2003(4):36-40.Zhang Zhongqing.Study of simulation structural model testing for shapai RCC arch dam[J].Design of Hydroelectric Power Station,2003(4):36-40.(in Chinese)
[9]张宇,冯新,侯爽,等.结构缝对高碾压混凝土拱坝地震破坏机理影响的试验研究[J].水利学报,2015,46(10):1222-1232.Zhang Yu,Feng Xin,Hou Shuang,et al.Experimental study of the impact of structural joints on seismic failure mechanism of large roller compacted concrete arch dam[J].Journal of Hydraulic Engineering,2015,46(10):1222-1232.(in Chinese)
[10]王迎春.碾压混凝土层面结合特性和质量标准研究[D].杭州:浙江大学,2007.
[11]武维毓.基于碾压混凝土成层特性的弹塑性分析及数值模拟研究[D].杭州:浙江大学,2014.
[12]张旭辉.碾压层缝对碾压混凝土拱坝承载能力的影响研究[D].桂林:广西大学,2006.
[13]潘慧铭.(三)界面的扩散作用[J].黏合剂,1988(2):41-48.Pan Huiming.(three)The diffusion effect of interface[J].Adhesives,1988(2):41-48.(in Chinese)
[14]严志云,石虹桥,梁世强,等.聚合物复合材料界面黏合理论研究进展[J].仲恺农业技术学院报,2007,20(2):62-65.Yan Zhiyun,Shi Hongqiao,Liang Shiqiang,et al.Progress of study on the interfacial adhesion of polymer composites[J].Journal of Zhongkai University of Agriculture and Technology,2007,20(2):62-65.(in Chinese)
[15]王作龄.橡胶材料黏合的科学[J].世界橡胶工业,1999(1):24-34.Wang Zuoling.The science of rubber material bonding[J].World Rubbre Industry,1999(1):24-34.(in Chinese)
[16]段虎明,秦树人,李宁.频率响应函数估计方法综述[J].振动与冲击,2008,27(5):48-52.Duan Huming,Qin Shuren,Li Ning.Measurement methods review for frequency response function[J].Journal of Vibration and Shock,2008,27(5):48-52.(in Chinese)
[17]曹坚.基于参数模型的频响函数估计方法[J].振动、测试与诊断,2011,31(1):70-73.Cao Jian.Estimation of frequency response function using parameter model[J].Journal of Vibration,Measurement&Diagnosis,2011,31(1):70-73.(in Chinese)
[18]Dobrowiecki T P,Schoukens J,Guillaume P.Optimized excitation signals for MIMO frequency response function measurements[J].IEEE Transactions on Instrumentation&Measurement,2006,55(6):2072-2079.