摘要
针对目前阻尼合金研究试样较小、测试方法和条件同实际应用环境相差较大的问题,采用Fe-Mn阻尼合金和45钢制作成同尺寸的简支梁,在振动台上进行激振实验,测试其在受迫振动条件下的幅频响应特性,有助于认识大尺寸Fe-Mn合金构件在受迫振动条件下的阻尼减振行为,为进一步推动其在工程中应用奠定基础。实验结果表明:在受迫振动条件下,Fe-Mn阻尼合金梁的阻尼减振特性主要表现在大幅度降低共振时的振幅和明显减小产生共振的频率范围两方面,这在工程中具有很好的应用前景;激振强度较大时,Fe-Mn阻尼合金梁展现出很好的阻尼减振性能,而激振较小时,阻尼减振性能不明显,说明其适用于受较大力和冲击场合下的减振。
In order to solve problems that damping alloy specimen are much smaller and testing methods are not coincident with practical application conditions,the amplitude-frequency forced response characteristics of simply supported beams made by Fe-Mn damping alloy and 45 steel are studied repectively on a vibratory table.The results indicate that for forced vibration,the damping behavior of the Fe-Mn alloy beam shows its resonance amplitude could be reduced significantly and the range of its resonance frequency is apparently narrower than that of 45 steel.The larger the exciting force,the better the damping capacity of the Fe-Mn alloy beam.In a word,in engineering application,Fe-Mn damping alloy is suitable for the environment where there exist larger vibrating force and shock.
出处
《振动与冲击》
EI
CSCD
北大核心
2008年第10期81-82,86,共3页
Journal of Vibration and Shock
基金
上海交通大学机械系统与振动国家重点实验室开放基金(VSN-2007-04)
新世纪优秀人才支持计划资助项目(NCET-06-793)
教育部科学技术研究重点项目(107093)
关键词
阻尼合金
阻尼减振
Fe—Mn
简支梁
受迫振动
幅顿特性
damping alloy
damping capacity
Fe-Mn
simply supported beam
forced vibration
amplitude-frequency characteristics
