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| 1 | A limb-inspired bionic quasi-zero stiffness vibration isolator显示文摘Vibration reduction has always been one of hot and important topics in mechanical engineering,especially for the special measurement instrument.In this paper,a novel limb-inspired bionic structure is proposed to generate negative stiffness and design a new quasi-zero stiffness isolator via torsion springs,distinguishing from the existing tension spring structures in the literature.The nonlinear mathematical model of the proposed structure is developed and the corresponding dynamic properties are further investigated by using the Harmonic Balance method and ADAMS verification.To evaluate the vibration isolation performance,typical three-springs quasi-zero stiffness(TS QZS)system is selected to compare with the proposed bionic structure.And the graphical processing unit(GPU)parallel technology is applied to perform necessary two-parameter analyses,providing more insights into the effects of parameters on the transmissibility.It is shown that the proposed structure can show advantages over the typical TS QZS system in a wider vibration isolation range for harmonic excitation case and shorter decay time for the impact excitation case. | Rong Zeng Guilin Wen Jiaxi Zhou Gang Zhao | 2021 | Acta Mechanica Sinica2021，37，7： | 2 |
| 2 | Design and experimental study of a compact quasi-zero-stiffness isolator using wave springs显示文摘The quasi-zero-stiffness(QZS)vibration isolation has been proven to be an effective way to isolate low-frequency vibration.However,most of the existing QZS isolators are space-consuming,which could not be employed in the space-limited circumstances.In this paper,a quite compact QZS isolator is engineered by connecting a pair of mutually repulsive magnet rings and a space-saving wave spring in parallel,called WQZS isolator.The restoring force of the magnet ring is derived by the equivalent magnetic charge method,and an empirical formula for the restoring force of the wave spring is derived by the least squares method based on experimental data.The dynamic model of the WQZS vibration isolation system is built,and the vibration isolation performance is evaluated through transmissibility.Finally,an experimental prototype is fabricated,and the experimental tests on frequency sweep are carried out.The results show that compared with the linear counterpart,the vibration isolation frequency of the WQZS isolator is reduced by 48.89%,and the peak transmissibility is decreased by 59.33%.Most importantly,the space occupancy of the WQZS isolator designed in this paper is much lower than that of the traditional QZS isolators,and thus it should be a potential solution for low-frequency vibration isolation in the space-limited environment. | WANG Qiang ZHOU JiaXi WANG Kai XU DaoLin WEN GuiLin | 2021 | Science China(Technological Sciences)2021，64，10： | 1 |
| 3 | 准零刚度隔振系统的分析及研究进展显示文摘基于准零刚度隔振系统的基本原理,对准零刚度非线性系统在简谐力激励和位移激励情况下的动力学特性进行了系统分析,进一步展开论述了准零刚度隔振系统的结构设计理念和研究框架,总结了准零刚度隔振系统的研究现状和准零刚度隔振器的主动控制理论进展.最后阐述了准零刚度隔振中现存许多亟待解决和值得深入研究的方向,提出了准零刚度隔振系统在三维隔振和复杂随机振动等领域尚存的问题,为设计新型的准零刚度隔振系统提供借鉴与参考. | 刘涛 李爱群 | 2023 | 东南大学学报(自然科学版)2023，53，6： | 0 |
| 4 | 仿脊柱隔振器振动特性分析显示文摘受人体脊柱负重减振作用的生物学启发,设计了一种多层节状连接仿生隔振器。分析不同设计参数对隔振器静态刚度和承载能力的影响,由拉格朗日动力学公式建立了隔振系统动力学方程,利用谐波平衡法对动力学方程进行求解,分析不同设计参数对隔振器位移传递率的影响,通过四阶龙格库塔法求出数值解并与谐波平衡法的解析解进行对比,验证了该研究结论的正确性。研究结果表明:隔振器静态刚度具有明显非线性特性,通过设计参数的调节可使隔振器在工作范围内获得正刚度、零刚度或负刚度;满足正刚度条件时降低刚度比、增加初始角度可提高隔振器承载能力;改变隔振器设计参数如增加层数、减小初始角度、降低刚度比可显著降低隔振器位移传递率。研究结果对仿脊柱隔振器的工程应用具有指导意义。 | 李小彭 王政浩 王碧涵 | 2022 | 振动与冲击2022，41，8： | 0 |
| 5 | 仿足弓准零刚度隔振器特性分析与实验显示文摘为满足光学精密仪器更高的精度及动态特性要求,解决其安装空间逼仄与宽频域隔振的矛盾,提出了一种由屈曲梁与黏弹性材料并联构成的仿生准零刚度隔振装置,并建立了该仿生隔振装置的非线性动力学模型,结合谐波平衡法对其振动传递特性进行了分析。仿真与实验结果表明:当频率比大于15时,振动幅值传递率小于0.2,系统共振区振动幅值传递率低于0.75,隔振效果良好。该结论验证了仿足弓准零刚度隔振器的有效性,为光学精密仪器复杂隔振系统设计提供了参考。 | 邓宏光 陈新度 王晗 张帆 | 2024 | 振动.测试与诊断2024，44，1： | 0 |
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