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| 1 | Numerical and Experimental Investigations on Tunable Low-frequency Locally Resonant Metamaterials显示文摘In this paper,a tunable locally resonant metamaterial is proposed for low-frequency band gaps.The local resonator composed of two pairs of folded slender beams and a proof mass is designed based on the theory of compliant mechanism.The design optimization on geometric parameters is carried out to fulfil the quasi-zero-stiffness property.The locally resonant metamaterial is formed by periodically arranged unit cells,and the transmittance of longitudinal wave is studied through three aspects:numerical predictions,finite element simulations and experimental tests.The variation trends revealed by these three methods match well with one another:the band gap moves to lower frequency and both its depth and width get smaller and smaller with the increase of pre-compression(Δ).The band gap overlays the frequency range of 73.10–92.38 Hz and 16.78–19.49 Hz atΔ=0mm andΔ=10mm,respectively,providing a wide range of tunability.Besides,the ultralow-frequency band gap can be achieved asΔapproaches 10 mm.This study may provide an avenue for achieving the tunable ultralow-frequency locally resonant band gap. | Qida Lin Jiaxi Zhou Hongbin Pan Daolin Xu Guilin Wen | 2021 | Acta Mechanica Solida Sinica2021，34，5： | 4 |
| 2 | Spectrum op- timization-based chaotification using time-delay feedback control 显示文摘 | Zhou Jiaxi Xu Daolin Zhang Jing | 2012 | Chaos Solitons Fractals2012，45，6： | 1 |
| 3 | Controlling the ultimate state of projective synchronization in chaotic systems of arbitrary dimension显示文摘 | Xu Daolin Chee Chin Yi | 2002 | Phys Rev E2002，66，： | 1 |
| 4 | Control of projective synchronization in chaotic systems显示文摘 | Xu Daolin | 2001 | Phys Rev E2001，63，： | 1 |
| 5 | Applying chaos control in periodic windows显示文摘 | STEVEN R B XU Daolin LIAW Chinyong | 1998 | Chaos Solitons & Fractal1998，9，8： | 1 |
| 6 | A secure communication scheme using projective chaos synchronization显示文摘 | Li Zhigang Xu Daolin | 2004 | Chaos Solitons & Fractals2004，22，2： | 1 |
| 7 | A secure communication scheme using projective chaos synchronization显示文摘 | Li Zhigang Xu Daolin | 2004 | Chaos Solitons and Fractals2004，22，2： | 1 |
| 8 | Control algorithm for creation of Hopf bifurcations in continuous-time systems of arbitrary dimension 显示文摘 | Wen Guilin Xu Daolin | 2005 | Physics Letters A2005，337，12： | 1 |
| 9 | Manipulating the scaling factor of projective synchronization in three-dimensional chaotic systems显示文摘 | Xu Daolin Z Li higang Bishop Steven R | 2001 | Chaos (S0108-4453)2001，11，3： | 1 |
| 10 | Control of projective synchronization in chaotic systems显示文摘 | XU Daolin | | 0，，02： | 1 |
| 11 | Control of projective synchronization in chaotic systems显示文摘 | XU Daolin | 2001 | Physical Review E (S0031-9007)2001，63，02： | 1 |
| 12 | Controlling the ultimate state of projective synchronization in chaotic systems of arbitrary dimension显示文摘 | Xu Daolin Chee Chin Yi | 2002 | Physical Review E (S0031-9007)2002，66，04： | 1 |
| 13 | Involvement of miR-21 in resistance to daunorubicin by regulating PTEN expression in the leukaemia K562 cell line显示文摘 | Haitao Bai Rang Xu Zhongwei Cao Daolin Wei Chun Wang | 2010 | FEBS Letters2010，，2： | 1 |
| 14 | Theoretical design and experimental verification of a tunable floating vi- bration isolation system显示文摘 | Liu Chunrong Xu Daolin Ji Jianfei | 2012 | Journal of Sound and Vi- bration2012，331，： | 1 |
| 15 | 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 |
| 16 | Theoretical and experimental analyses of a nonlinear magnetic vibration isolator with quasi-zero-stiffness characteristic显示文摘 | Daolin Xu Qiping Yu Jiaxi Zhou | 2013 | Journal of Sound and Vibration2013，，332： | 1 |
| 17 | A zero-crossing approach to uncover the mask by chaotic encryption with periodic modulation显示文摘 | Chin Yi Chee Daolin Xu Steven R. Bishop | 2004 | Chaos, Solitons and Fractals2004，，： | 1 |
| 18 | A secure communication scheme using projective chaos synchronization 显示文摘 | Li Zhigang Xu Daolin | 2004 | Chaos Solitons & Fractals2004，22，2： | 1 |
| 19 | Control of projective synchronization in chaotic systems显示文摘 | Xu Daolin | 2001 | Physical review E2001，64，02： | 1 |
| 20 | Estimation of periodic-like motions of chaotic evolutions using detected unstable periodic patterns 显示文摘 | Daolin Xu Zhigang Li Bishop Steven R | 2002 | Pattern Recognition Letters2002，，： | 1 |
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