CAJ | 학술논문

针对工程实践中的低频隔振难题，提出一种紧凑的、带滚球装置的准零刚度隔振器。首先，对隔振器进行了静力学分析，得到了实现准零刚度的参数条件；其次，建立了隔振系统动力学模型，利用谐波平衡法分析了系统频响特性及隔振性能，讨论了激励幅值和阻尼对响应的影响；最后，利用 ADAMS 对系统动力学特性进行仿真及隔振效果评估。结果表明，与相应的线性隔振系统相比，准零刚度隔振器的起始隔振频率显著降低，且在低频范围内力传递率比线性系统低得多。因此，滚球装置提供的负刚度明显降低了系统竖向总刚度，使系统具有优异的低频隔振性能，更重要的是紧凑的设计使其更易工程化。
침대공정실천중적저빈격진난제，제출일충긴주적、대곤구장치적준령강도격진기。수선，대격진기진행료정역학분석，득도료실현준령강도적삼수조건；기차，건립료격진계통동역학모형，이용해파평형법분석료계통빈향특성급격진성능，토론료격려폭치화조니대향응적영향；최후，이용 ADAMS 대계통동역학특성진행방진급격진효과평고。결과표명，여상응적선성격진계통상비，준령강도격진기적기시격진빈솔현저강저，차재저빈범위내력전체솔비선성계통저득다。인차，곤구장치제공적부강도명현강저료계통수향총강도，사계통구유우이적저빈격진성능，경중요적시긴주적설계사기경역공정화。
A compact ball-type quasi-zero-stiffness (QZS )vibration isolator was proposed for the purpose of low-frequency vibration isolation.Firstly,its parameters of quasi-zero stiffness were obtained using a static analysis. Furthermore,the dynamic model of the vibration isolation system was established, and the frequency-response characteristic and vibration isolation performance were analyzed with the harmonic balance method.The effects of excitation amplitude and damping on the system response were also discussed.Finally,numerical simulations were performed with ADAMS software,and the vibration isolation effects were evaluated.The results showed that compared with the corresponding linear vibration isolation system,the QZS vibration isolator can obviously reduce the starting vibration isolation frequency,and has a much lower load transmissibility in the range of low frequency;therefore,the negative stiffness provided by the ball-type mechanism significantly reduces the total vertical stiffness of the system,and the excellent low-frequency vibration isolation performance is achieved;what's more,its compact design makes it more convinient to be used in engineering.