三向隔震不锈钢丝金属橡胶力学性能试验研究
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摘要
为开发金属橡胶三向隔震器,文中针对不同成型密度的不锈钢丝金属橡胶试件,分别在拟静力、动力荷载作用下进行压缩和剪切性能试验,测试试件成型密度、加载幅值、循环加载次数、动力加载频率等因素对金属橡胶材料压缩和剪切滞变性能的影响规律,分析研究各试件的力学性能和阻尼性能。研究结果表明,金属橡胶材料承受压缩和剪切变形时均具有良好的变形能力(压缩荷载下可回复变形达40%,剪切荷载下可回复变形达80%),其滞变耗能能力随着试件成型密度的增大而增大;加载频率和加载次数对金属橡胶压缩和剪切滞变性能几乎没有影响;压缩荷载下试件的割线模量大于剪切荷载下的割线模量,但压缩变形时的等效阻尼比小于剪切变形下的等效阻尼比。
In order to develop novel three directional isolators,a large number of tests of the stainless steel metallic-pseudo-rubber(MPR) material were carried out.The mechanical properties of stainless steel MPR specimens with various nominal densities were tested.Static and dynamic compression and shear loads were applied on the specimens.During the tests,the influence of several important factors such as nominal density,strain amplitude,cyclic loading number and loading frequency on the mechanical behavior of MPR are studied.The experimental results indicate that MPR has good deformation capacity under either compression or shear loading.The restorable strain limit is 40% under compression loading,while it is 80% under shear loading.With the increase of nominal density,the MPR has larger energy dissipation capability.Frequency and cyclic number of applied loading have little influence on properties of the MPR in the case of compression and shear tests.The secant modulus of specimens under compression loading is larger than that under shear loading but the damping ratio is opposite.
In order to develop novel three directional isolators,a large number of tests of the stainless steel metallic-pseudo-rubber(MPR) material were carried out.The mechanical properties of stainless steel MPR specimens with various nominal densities were tested.Static and dynamic compression and shear loads were applied on the specimens.During the tests,the influence of several important factors such as nominal density,strain amplitude,cyclic loading number and loading frequency on the mechanical behavior of MPR are studied.The experimental results indicate that MPR has good deformation capacity under either compression or shear loading.The restorable strain limit is 40% under compression loading,while it is 80% under shear loading.With the increase of nominal density,the MPR has larger energy dissipation capability.Frequency and cyclic number of applied loading have little influence on properties of the MPR in the case of compression and shear tests.The secant modulus of specimens under compression loading is larger than that under shear loading but the damping ratio is opposite.
引文
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[10]Jiang Hongyuan,Zhang Ruihua,Xia Yuhong.Stationary dynamic characteristics analysis of new squeezed film damper[J].Chinese Journal ofMechanical Engineering,2006,19(3):442-445.
[2]切戈达耶夫,穆柳金,科尔特平,编著,李中郢,译.金属橡胶构件的设计[M].北京:国防工业出版社,2000.ЧегодаевДЕ,МулюкинОП,КолтыгинЕВ.Design of Metal Rubber Components[M].Li Z Y translated.Beijing:National Defence IndustryPress,2000.
[3]李惠,毛晨曦.新型SMA耗能器及结构地震反应控制实验研究[J].地震工程与工程振动,2003,23(1):133-139.Li Hui,Mao Chenxi.Experimental investigation of earthquake response reduction of buildings with added two types of SMApassive energy dissipa-tion devices[J].Journal of Earthquake Engineering and Engineering Vibration,2003,23(1):133-139.
[4]BSSC.Recommended Provisions for Seismic Regulations for NewBuildings and Other Structures(FEMA450)[S].Washington:FE-MA,2004.
[5]Tinker ML,Cuthins MA.Damping phenomenon in a wire rope vibration isolator[J].Journal of Sound and Vibration,1992,157(1):7-18.
[6]辛士勇,朱石坚,曾懿.金属橡胶隔振器隔振性能的实验研究[J].中国舰船研究,2008,12(3):13-21.Xin Shiyong,Zhu Shijian,Zeng Yi.Experimental study of the vibration reducing performance of metal rubber isolators[J].Chinese Journal ofShip Research,2008,12(3):13-21.
[7]寇宏宁,刘国权,杨建春,等.金属橡胶用Cr-Ni-Mn系不锈钢丝的微观组织及力学性能研究[J].航空材料学报,2006,26(4):32-33.Kou Hongning,Liu Guoquan,Yang Jianchun,et al.Microstructure and mechanical properties of stainless steel wires used for metal rubber[J].Journal of aeronautical materials,2006,26(4):32-33.
[8]姜洪源,敖宏瑞,夏宇宏,等.金属橡胶成型工艺研究及其应用[J].机械工艺师,2001,35(2):35-36.Jiang Hongyuan,Ao Hongrui,Xia Yuhong,et al.Research on manufacturing technology and application of metal rubber[J].Mechanical technolo-gist,2001,35(2):35-36.
[9]杨春香,周易,张虎,等.金属橡胶动态隔振性能的实验研究[J].航空学报,2006,5(3):536-539.Yang Chunxiang,Zhou Yi,Zhang Hu,et al.Research on dynamic performance of metal rubber damper[J].Acta Aeronautica Et Astronautica Sin-ica.2006,5(3):536-539.
[10]Jiang Hongyuan,Zhang Ruihua,Xia Yuhong.Stationary dynamic characteristics analysis of new squeezed film damper[J].Chinese Journal ofMechanical Engineering,2006,19(3):442-445.
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