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摘要(小五，黑体)：提出具有负刚度特性的欧拉屈曲梁结构并分析其静态特性，将负刚度机构和线性隔振器并联使用，设计

度向渐软刚度以及渐软-渐硬刚度混合的特性改变，并显著改变系统的传递性能。(小五，宋体)

关键词(小五，黑体)：负刚度；隔振；非线性系统；谐波平衡法；载荷(小五，宋体)

中图分类号(小五，黑体)：TG156(小五，Times New Roman)

which is analyzed. A quasi-zero stiffness isolator is designed by parallel connected the negative stiffness mechanism and a linear

isolator. The Euler buckled beam structure functions as a stiffness corrector to lower the stiffness of the linear isolator. If the load is

chosen properly, the equilibrium point will be set at the zero stiffness point, any changes of the load will lead the equilibrium point

deviating from the zero stiffness point. The dynamic model is built considering the load effect and the Harmonic balance method is

employed to solve for the dynamic response of the system. Force transmissibility of the zero stiffness isolator is defined and

compared with that of an equivalent linear one. The effect of excitation amplitude and load on the performance is analyzed. The

results show that the force excitation amplitude and load can change the characteristic of the nonlinear isolator from a hardening

stiffness system to a softening stiffness system and even a mixed softening-hardening stiffness system. The excitation amplitude and

load also have great affection on the transmissibility performance. (小五)

Key words(小五，加粗)：Negative stiffness；Vibration isolation；Nonlinear systems；Harmonic balance method；load

� 国家自然科学基金资助项目(11202128)。20121205 收到初稿，20120205

收到修改稿（六号宋体，此处为脚注，和正文分开）

领域，对低频隔振的需求更加迫切。然而，普通的

隔振器很难在低频范围有效隔振，研发在低频区域

隔振性能好、承载能力强的隔振器一直是各国学者

的研究热点。线性理论表明，在一定载荷下，降低

隔振器的刚度可以显著降低隔振器起始隔振频率，

从而获取低频隔振性能。但是降低隔振器的刚度又

使得隔振器的静态变形增加而丧失承载能力，同时

会带来稳定性以及占用空间过大等问题。近年来，