矩形箱装置减振分析与利用
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摘要
通过对矩形水箱的动力学分析后,提出利用水构成一种非线性吸振器,进行低频振动的吸收。通过进一步对两自由度吸振系统仿真,可知增大子系统的阻尼可以在更大程度上降低主系统的响应,因此利用常见建筑材料沙子构成了另外一种吸振器,做了它和水以及无吸振材料时的对比性实验,通过最后的数据分析,认为子系统阻尼越大,其对低频振动的吸收效果愈好,尽管其在个别频率处的效果可能会低。这为低频振动的实际工程治理提供了一种新的方法。
A non-linear absorber using water was proposed based on the dynamic analysis of rectan- gular box to absorb low-frequency vibration.Deeply,through simulation of two-degree freedom system, an conclusion was made,that is ,increasing damping of subsystem can reduce the response of main-sys- tem.Therefore,another absorber was lifted by using usual material-sand,and comparison experiment was carried out by water,sand and no absorbing material.The final data indicates that the damping of subsys- tem is bigger,the absorbing effect is better,although its effect is lower in some discrete frequencies, which provide a new method of low-frequency vibration control in actual project.
A non-linear absorber using water was proposed based on the dynamic analysis of rectan- gular box to absorb low-frequency vibration.Deeply,through simulation of two-degree freedom system, an conclusion was made,that is ,increasing damping of subsystem can reduce the response of main-sys- tem.Therefore,another absorber was lifted by using usual material-sand,and comparison experiment was carried out by water,sand and no absorbing material.The final data indicates that the damping of subsys- tem is bigger,the absorbing effect is better,although its effect is lower in some discrete frequencies, which provide a new method of low-frequency vibration control in actual project.
引文
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[4]Y.Tamura,K.Fujii and T.Ohtsuki.Effectiveness of Tuned Liquid Dampers Under Wind Excitation[J].Engineering Structures.1995;17 (9):609-621.
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[6]钱稼茹，P．W．arnitchai，丁熊．用TLD减小电视塔动力反应的振动台实验研究[J]．建筑结构学报．1995，16(5)：32-39．
[7]翟伟廉．高层建筑和高耸结构的风振控制设计[M]．武汉：武汉测绘科技大学出版社．1991．
[8]张敏政，丁世文，郭迅．利用水箱减振的结构控制研究[J]．地震工程与工程振动．1993，13(1)：40-48．
[9]居容初，曾心传弹性结构与液体的耦联振动理论[M]．北京：地震出版社．1983．
[10]李俊，金咸定，刘见华．多自由度无阻尼动力吸振器的研究[J]．．振动、测试与诊断，2003，23(2)．
[2]H.F Bauer.Oscillations of Immiscible Liquids in a Rectangular Container:a New Damper for Exicited Structures[J].J.of Sound and Vibration.1984;93(1):117-133.
[3]Sato T.Tuned Sloshing Dampers[J].J.of Wind Engineering.1987,32:67-68.
[4]Y.Tamura,K.Fujii and T.Ohtsuki.Effectiveness of Tuned Liquid Dampers Under Wind Excitation[J].Engineering Structures.1995;17 (9):609-621.
[5]程文壤，翟伟廉．南京电视塔的风振控制[J]．土木工程学报，1993(4)
[6]钱稼茹，P．W．arnitchai，丁熊．用TLD减小电视塔动力反应的振动台实验研究[J]．建筑结构学报．1995，16(5)：32-39．
[7]翟伟廉．高层建筑和高耸结构的风振控制设计[M]．武汉：武汉测绘科技大学出版社．1991．
[8]张敏政，丁世文，郭迅．利用水箱减振的结构控制研究[J]．地震工程与工程振动．1993，13(1)：40-48．
[9]居容初，曾心传弹性结构与液体的耦联振动理论[M]．北京：地震出版社．1983．
[10]李俊，金咸定，刘见华．多自由度无阻尼动力吸振器的研究[J]．．振动、测试与诊断，2003，23(2)．
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