摘要
准零刚度隔振器相比线性隔振器,具有宽频、低传递率的优良隔振性能,是一种应用前景较好的被动式隔振器。但单个静态平衡点的准零刚度隔振器在变承载质量隔振、大幅激励隔振方面存在问题,因此基于斜杆拉簧恒值负刚度机制构造了恒值准零刚度隔振器,推导出了恒值准零刚度、非恒值准零刚度、零刚度的参数条件,分析了参数影响下的准零刚度特性和规律。设计并制造了实验模型,根据恒值准零刚度参数条件装配实验模型,通过万能试验机获得了实验模型的力位移曲线,与理论预测值一致性较好,验证了静态分析理论。随后采用Polytec激光测振仪和振动台对恒值准零刚度实验模型开展了动态实验,获得的实验传递率与理论预测值一致性较好,具有起始隔振频率接近1 Hz的较宽频带和较低传递率幅值。
Compared with linear vibration isolator,quasi-zero stiffness vibration isolator has excellent vibration isolation performance with wide frequency and low transmissibility,and it is a kind of passive vibration isolator with better application prospect.However,the quasi-zero stiffness isolator with a single static equilibrium point has problems in the variable bearing mass isolation and large excitation isolation.For solving the problems,a constant-value quasi-zero stiffness isolator is constructed by using the constant-value negative stiffness mechanism of oblique bars and tension springs.The parameter conditions of constant-value quasi-zero stiffness,non-constant-value quasi-zero stiffness and zero stiffness are derived,as well as the characteristics of quasi-zero stiffness and the law under the influence of the parameters are analyzed.The experimental model is then designed,manufactured and assembled according to the constant-value quasi-zero stiffness parameter conditions.The universal testing machine is used to obtain the force-displacement curves which corresponded well with theoretical predictions,providing verification for the static analysis theory.Subsequently,the Polytec laser vibrometer and the shaking table are used to collect dynamic experiments results on the experimental model with constant-value quasi-zero stiffness.The experimental transmissibility is consistent with theoretical predictions well.The isolator has the wide bandwidth with the starting isolation frequency of close to 1 Hz and low transmissibility amplitude.
作者
赵峰
秦浦
杜文辽
王才东
曹树谦
ZHAO Feng;QIN Pu;DU Wenliao;WANG Caidong;CAO Shuqian(School of Mechanical and Electrical Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002;Department of Mechanics,Tianjin University,Tianjin 300072;Tianjin Key Laboratory of Nonlinear Dynamics and Control,Tianjin 300072)
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2024年第17期223-234,共12页
Journal of Mechanical Engineering
基金
国家自然科学基金(12202405、 52275138)
河南省重点研发专项(231111221100)
河南省高校科技创新人才支持计划(22HASTIT023)资助项目。
关键词
隔振
准零刚度
恒值准零刚度
阻尼
实验
vibration isolation
quasi-zero stiffness
constant QzS
damping
experiment
