土工二维振动离心机转臂的设计研究
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摘要
土工二维振动离心机是岩土地震工程试验研究最有效的试验设备,转臂是支承和驱动吊篮、振动台、试验模型和配重等高速旋转并达到离心试验加速度要求的关键部件.常规土工离心机转臂结构已不满足二维振动试验工况要求.为了使离心机能在常规土工试验、一维振动试验和二维振动试验各工况下稳定运行,将其转臂设计成具有工字梁的焊接框架结构.在对该结构布局和工作原理介绍的基础上,针对某二维振动离心机技术指标,对转臂结构进行了优化设计,并对优化结构进行了力学分析.其结果表明,焊接的框架结构满足二维振动试验工况要求,是一种比较合理的土工二维振动离心机转臂结构.
The two-dimensional geotechnical centrifugal shaker is the most effective test equipment in researches for geotechnical earthquake engineering,and the swing arm is the key component,which supports suspended baskets,shaking table,test model and trim block etc,and drives them rotate to achieve centrifugal test acceleration.The conventional geotechnical centrifuge's swing arm structure cannot meet the two-dimensional vibration test conditions.In order to make the two-dimensional geotechnical centrifugal shaker operate stably under different working conditions such as conventional soil tests,one-dimensional vibration tests and two-dimensional vibration tests,the swing arm was designed as welded frame structure which had I-beams.Aiming at the qualifications of a certain two-dimensional geotechnical centrifugal shaker,the swing arm was optimum designed while its structure layout and operating principle had been introduced.The results of mechanical analysis show that the welded frame structure is reasonable because it meets all of the two-dimensional geotechnical centrifugal shaker's test condition requirements.
The two-dimensional geotechnical centrifugal shaker is the most effective test equipment in researches for geotechnical earthquake engineering,and the swing arm is the key component,which supports suspended baskets,shaking table,test model and trim block etc,and drives them rotate to achieve centrifugal test acceleration.The conventional geotechnical centrifuge's swing arm structure cannot meet the two-dimensional vibration test conditions.In order to make the two-dimensional geotechnical centrifugal shaker operate stably under different working conditions such as conventional soil tests,one-dimensional vibration tests and two-dimensional vibration tests,the swing arm was designed as welded frame structure which had I-beams.Aiming at the qualifications of a certain two-dimensional geotechnical centrifugal shaker,the swing arm was optimum designed while its structure layout and operating principle had been introduced.The results of mechanical analysis show that the welded frame structure is reasonable because it meets all of the two-dimensional geotechnical centrifugal shaker's test condition requirements.
引文
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[7]《岩土离心机模拟技术的原理和工程应用》编委会.岩土离心模拟技术的原理和工程应用[M].武汉:长江出版社,2011:48-50.Principle and Engineering Application of GeotechnicalCentrifuge Modeling Technique Editorial Board.Princi-ple and engineering application of geotechnical centrifugemodeling technique[M].Wuhan:Changjiang Press,2011:48-50.
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[9]冉光斌,罗昭宇,刘小刚,等.土工离心机吊篮的设计及优化方法[J].机械设计,2009,26(11):68-70.RAN Guang-bin,LUO Zhao-yu,LIU Xiao-gang,et al.Design and optimization method of the suspended basketof geotechnical centrifuge[J].Journal of Machine De-sign,2009,26(11):68-70.
[10]李春枝,黎启胜,牛宝良.离心-振动复合下离心机结构振动测试与分析[J].振动与冲击,2008,21(增):265-267.LI Chun-zhi,LI Qi-sheng,NIU Bao-liang.The vibra-tion test and analysis of geotechnical centrifuge structureunder centrifuge and vibration combined environments[J].Journal of Vibration and Shock,2008,21(Supple-ment):265-267.
[2]包承纲.我国离心模拟试验技术的现状和展望[J].岩土工程学报,1991,13(6):92-97.BAO Cheng-gang.The state and prospect of centrifugalmodel test in China[J].Chinese Journal of GeotechnicalEngineering,1991,13(6):92-97.
[3]侯瑜京.土工离心机振动台及其试验技术[J].中国水利水电科学研究院学报,2006,4(1):15-22.HOU Yu-jing.Centrifuge shakers and testing technique[J].Journal of China Institute of Water Resources andHydropower Research,2006,4(1):15-22.
[4]王永志,袁晓铭,孙锐.大型振动离心机设备设计关键技术研究[J].世界地震工程,2011,27(2):113-123.WANG Yong-zhi,YUAN Xiao-ming,SUN Rui.Criticaltechniques of design for large scale centrifugal shakers[J].World Earthquake Engineering,2011,27(2):113-123.
[5]贺云波,简林柯,林廷圻,等.复合离心机振动台系统的研究现状[J].中国机械工程,1999,10(5):576-579.HE Yun-bo,JIAN Lin-ke,LIN Ting-qi,et al.State-of-the-art of systems combining centrifuge with table vibra-tor[J].China Mechanical Engineering,1999,10(5):576-579.
[6]冉光斌.恒加速度离心机转臂的稳健设计方法[J].机械设计与制造,2008(5):5-7.RAN Guang-bin.Robust design method of the invariableacceleration centrifuges swing arm[J].Machinery De-sign&Manufacture,2008(5):5-7.
[7]《岩土离心机模拟技术的原理和工程应用》编委会.岩土离心模拟技术的原理和工程应用[M].武汉:长江出版社,2011:48-50.Principle and Engineering Application of GeotechnicalCentrifuge Modeling Technique Editorial Board.Princi-ple and engineering application of geotechnical centrifugemodeling technique[M].Wuhan:Changjiang Press,2011:48-50.
[8]贾普照.稳态加速度模拟试验设备:离心机设计(15)[J].航天器环境工程,2011,28(3):288-305.JIA Pu-zhao.Steady state acceleration simulation test e-quipment-centrifuge design(Serial No.15)[J].Space-craft Environment Engineering,2011,28(3):288-305.
[9]冉光斌,罗昭宇,刘小刚,等.土工离心机吊篮的设计及优化方法[J].机械设计,2009,26(11):68-70.RAN Guang-bin,LUO Zhao-yu,LIU Xiao-gang,et al.Design and optimization method of the suspended basketof geotechnical centrifuge[J].Journal of Machine De-sign,2009,26(11):68-70.
[10]李春枝,黎启胜,牛宝良.离心-振动复合下离心机结构振动测试与分析[J].振动与冲击,2008,21(增):265-267.LI Chun-zhi,LI Qi-sheng,NIU Bao-liang.The vibra-tion test and analysis of geotechnical centrifuge structureunder centrifuge and vibration combined environments[J].Journal of Vibration and Shock,2008,21(Supple-ment):265-267.
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