摘要
针对含1层X形结构的三参数隔振器谐振频率会向高频移动的问题,提出一种新型含n层X形结构隔振器.采用谐波平衡法建立新型隔振系统动态响应的解析模型,并将解析解与时域数值解和多体动力学软件Adams得到的仿真数据进行对比,验证了所建含n层X形结构隔振器模型的正确性.基于建立的模型,通过计算对比了新型隔振器与传统两参数隔振器、三参数隔振器、含1层X形结构隔振器的力传递率曲线,得出含n层X形结构隔振器可以进一步降低谐振处的峰值,且谐振频率比向低频发生移动.经过研究得出影响含n层X形结构隔振器性能的主要参数为阻尼比、初始夹角、刚度比,与激励力幅值以及杆长无关;进一步分析了阻尼比、初始夹角、刚度比对隔振系统传递特性的影响,得出通过选择合适的设计参数,可以使含n层X形结构隔振器在谐振频率的峰值进一步减小,且在高频处的隔振性能保持不变.
Aiming at the problem that the resonant frequency of a three-parameter vibration isolator with a layer X-shaped structure will move to high frequencies,a new type of n-layer X-shaped structure isolator is proposed.Firstly,the harmonic balance method is used to establish the analytical model of the dynamic response of the new vibration isolation system,and the analytical solution is compared with the simulation data obtained by the time-domain numerical solution and the multi-body dynamics software ADAMS to verify the correctness of the built-up model of the isolator with an n-layer X-shaped structure.Based on the established model,the force transmissibility curves of,as well as the traditional two-parameter vibration isolator,traditional three-parameter vibration isolator,and a layer X-shaped structure vibration isolator,are calculated and compared.It is concluded that the proposed vibration isolator with n-layer X-shaped structure can further reduce the peak at resonance,and the resonance frequency ratio moves to lower frequency region.At the same time,the main parameters that affect the performance of the X-shaped structure with n-layers are the damping ratios,the initial angle,the stiffness ratios,which are independent of the excitation force amplitude and the rod length.Furthermore,the influence of the damping ratios,the initial angle and the stiffness ratios on the transmission characteristics of the vibration isolation system is further analyzed.The peak at resonance frequency of the vibration isolator with an n-layer X-shaped structure is further reduced when choosing proper design parameters around the resonance frequency,while the dynamic performance is not changed in high-frequency region.
作者
朱冬梅
刘伟
刘海平
史志远
贺凯
ZHU Dongmei;LIU Wei;LIU Haiping;SHI Zhiyuan;HE Kai(College of Mechanical Engineering,University of Science and Technology Beijing,Beijing 100083,China;Mining Products Safety Approval and Certification Center Co,Ltd,Beijing 100013,China)
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2021年第12期61-69,共9页
Journal of Hunan University:Natural Sciences
基金
国家自然科学基金资助项目(51405014)
安标国家矿用产品安全标志中心科技创新基金项目(2019ZL004,2019ZL005)。
关键词
隔振器
谐振频率
N层
X形结构
谐波平衡法
vibration isolator
resonance frequency
n-layer
X-shaped structure
harmonic balance method
