土工二维振动离心机主机结构的设计
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摘要
土工二维振动离心机是目前最先进的地震模拟试验设备,但其研制技术在国内鲜有报道。通过对二维振动离心机试验工况分析,确定了三层总体布局方案和垂臂/顺臂振动方向。针对二维振动离心机给定技术指标,提出了双吊篮对称臂结构和带工字梁的焊接框架转臂支架,并通过隔振专利技术设计了顺臂隔振和不平衡力检测系统。为保证隔振系统稳定运行和增强主机抗振能力,设计了动平衡调节系统,改进了支承系统与地基的联接方式。最后对主机系统进行了力学分析,其结果表明所设方案满足试验工况和技术指标要求。
Two-dimensional geotechnical centrifugal shaker is the most advanced test equipment for the recent earthquake simulation. However,few studies about its development technology have been reported at home. Through the analysis of test conditions of two-dimensional geotechnical centrifugal shaker,the three-layer overall layout and vertical or radial vibration direction were determined at first. Then aiming at given technical requirements of a certain two-dimensional geotechnical centrifugal shaker,a symmetrical structure swing arm with two swinging baskets and the swing arm bracket with welded I-beams frame structure were designed. Meanwhile,the unbalance force detection and radial vibration isolation system was designed based on the patent of vibration isolation. And then the dynamic balance system was designed and the connection mode between the support system and ground was improved to make the vibration isolation system operated stably and increase the anti-overturning ability of the main body structure. Finally,the structure of main body was analyzed,and the results show that the design meets all the test conditions and technical requirements.
Two-dimensional geotechnical centrifugal shaker is the most advanced test equipment for the recent earthquake simulation. However,few studies about its development technology have been reported at home. Through the analysis of test conditions of two-dimensional geotechnical centrifugal shaker,the three-layer overall layout and vertical or radial vibration direction were determined at first. Then aiming at given technical requirements of a certain two-dimensional geotechnical centrifugal shaker,a symmetrical structure swing arm with two swinging baskets and the swing arm bracket with welded I-beams frame structure were designed. Meanwhile,the unbalance force detection and radial vibration isolation system was designed based on the patent of vibration isolation. And then the dynamic balance system was designed and the connection mode between the support system and ground was improved to make the vibration isolation system operated stably and increase the anti-overturning ability of the main body structure. Finally,the structure of main body was analyzed,and the results show that the design meets all the test conditions and technical requirements.
引文
[1]孙锐,袁晓铭,王永志,等.NEES系统中振动离心机最新进展及国内振动离心机发展设想[J].世界地震工程,2010,16(1):31~39.
[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.
[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.
[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.
[5]冉光斌,胡绍全,刘小刚,等.振动离心机隔振系统:CN201220165821.7[P].中国工程物理研究院总体工程研究所.2013.3.
[6]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.
[7]冉光斌,冯英伟,刘小刚,等.土工振动离心机动平衡调节系统设计[J].机械设计与研究,2012,28(5):123~126.
[8]《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.
[9]冉光斌,余绍蓉,刘小刚,等.土工二维振动离心机转臂的设计研究[J].工程设计学报,2013,20(1):70~74.
[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(S):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.
[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.
[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.
[5]冉光斌,胡绍全,刘小刚,等.振动离心机隔振系统:CN201220165821.7[P].中国工程物理研究院总体工程研究所.2013.3.
[6]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.
[7]冉光斌,冯英伟,刘小刚,等.土工振动离心机动平衡调节系统设计[J].机械设计与研究,2012,28(5):123~126.
[8]《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.
[9]冉光斌,余绍蓉,刘小刚,等.土工二维振动离心机转臂的设计研究[J].工程设计学报,2013,20(1):70~74.
[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(S):265~267.
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