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| 1 | A dynamic modeling approach for nonlinear vibration analysis of the L-type pipeline system with clamps显示文摘There exists a lot of research on the nonlinear vibration of the pipeline system with different boundary conditions.To the best of our knowledge,little research on the actual constraint of the clamp has been performed.In this paper,according to hysteresis loops of the clamp obtained from experimental test,the simplified bilinear stiffness and damping model is proposed.Then the Finite Element(FE)model of L-type pipeline system with clamps is established using Timoshenko beam theory in combination with aforementioned stiffness-damping model.Both hammering and shaker tests verify the FE model via the comparisons of natural frequencies and vibration responses.The results show that the maximum errors of natural frequencies and vibration responses are about 8.31%and 17.6%,respectively.The proposed model can simulate the dynamic characteristics of the L-type pipeline system with clamps well,which is helpful to provide some guidance for the early design stage of pipeline in aero-engine. | Qingdong CHAI Jin ZENG Hui MA Kun LI Qingkai HAN | 2020 | Chinese Journal of Aeronautics2020，33，12： | 6 |
| 2 | Parameter identifications for a rotor system based on its finite element model and with varying speeds显示文摘为了为旋转的颤动完成预言,机械,一个精确有限元素(FE ) 模型和转子系统的一个有效参数鉴定方法被要求。在这研究,一个测试钻塔被用作一个转子系统的一个原型基于一个 FE 模型验证一种新奇参数鉴定技术。在改变操作速度的转子柄颤动被测量并且与 FE 结果相关。第一, FE 建模的理论和鉴定技术被介绍。然后磁盘失衡参数,僵硬和测试钻塔上的适用的支持的抑制系数被识别。有识别参数的 FE 模型的计算回答与试验性的结果比较被学习。关键词转子系统 - 有限元素模型 - 参数鉴定 - 模型确认工程被中国(50775028 ) 和中国的科技的部的国家自然科学基础为 863 高技术计划(2007AA04Z418 ) 支持。 | Qingkai Han Hongliang Yao Bangchun Wen | 2010 | Acta Mechanica Sinica2010，26，2： | 4 |
| 3 | External synchronization of two dynamical systems with uncertain parameters显示文摘External synchronization is addressed as two or more dynamical systems with synchronous motions,which is also regarded as master-slave system.In this paper,two dynamical systems,one employs a hysteretic term to model the friction phenomenon,the other involves a hardening stiffness component with the third order of displacement due to flexible deformation,are controlled to converge to the same trajectory.The control strategy is extended from feedback control for all parameters known to adaptive control for linear parameters unknown and all parameters unknown.The slave system can keep synchronous motions with the movements of master via the designed control strategy even all the parameters are not known.The stability of synchronization error,the transient process into synchronization and the effects of parameters on the designed controller using different control strategies are investigated.The simulation results unfold the feasibility and effectiveness of this synchronization method. | HAN QingKai 1,SUN XiaoYu 2,YANG XiaoGuang 3 &WEN BangChun 1 1 School of Mechanical Engineering&Automation,Northeastern University,Shenyang 110004,China 2 School of Electrical Engineering,Shenyang University of Technology,Shenyang 110023,China 3School of Mechanical Engineering,The University of Birmingham,Birmingham,B15 2TT,UK | 2010 | Science China(Technological Sciences)2010，53，3： | 3 |
| 4 | Balancing method without trial weights for rotor systems based on similitude scale model显示文摘 | Ruiduo YE Liping WANG Xiaojie HOU Zhong LUO Qingkai HAN | 2018 | Frontiers of Mechanical Engineering2018，13，4： | 3 |
| 5 | Similitude design for the vibration problems of plates and shells: A review显示文摘 | Yunpeng ZHU You WANG Zhong LUO Qingkai HAN Deyou WANG | 2017 | Frontiers of Mechanical Engineering2017，12，2： | 3 |
| 6 | Achievement of chaotic synchronization trajectories of master-slave manipulators with feedback control strategy显示文摘This paper addresses a master-slave synchronization strategy for complex dynamic systems based on feedback control.This strategy is applied to 3-DOF planar manipulators in order to obtain synchronization in such complicated as chaotic motions of end-effectors.A chaotic curve is selected from Duffing equation as the trajectory of master end-effector and a piecewise approximation method is proposed to accurately represent this chaotic trajectory of end-effectors.The dynamical equations of master-slave manipulators with synchronization controller are derived, and the Lyapunov stability theory is used to determine the stability of this controlled synchronization system.In numerical experiments,the synchronous motions of end-effectors as well as three joint angles and torques of master-slave manipulators are studied under the control of the proposed synchronization strategy.It is found that the positive gain matrix affects the implementation of synchronization control strategy.This synchronization control strategy proves the synchronization's feasibility and controllability for complicated motions generated by master-slave manipulators. | Qingkai Han Lina Hao Hao Zhang Bangchun Wen | 2010 | Acta Mechanica Sinica2010，26，3： | 2 |
| 7 | EMT and MET as paradigms for cell fate switching显示文摘Cell fate determination is a major unsolved problem in cell and developmental biology.The discovery of reprogramming by pluri-potent factors offers a rational system to investigate the molecular mechanisms associated with cell fate decisions.The idea that reprogramming of fibroblasts starts with a mesenchymal-epithelial transition(MET)suggests that the process is perhaps a reversal of epithelial to mesenchymal transition(EMT)found frequently during early embryogenesis.As such,we believe that investigations into MET-EMT may yield detailed molecular insights into cell fate decisions,not only for the switching between epithelial and mesenchymal cells,but also other cell types. | Jiekai Chen Qingkai Han Duanqing Pei | 2012 | Journal of Molecular Cell Biology2012，4，2： | 2 |
| 8 | Periodic motion stability of a dual-disk rotor system with rub-impact at fixed limiter显示文摘 | Han Qingkai | | 0，，： | 1 |
| 9 | Periodic motions of a dual-disk rotor system with rub-impact at fixed limiter显示文摘 | Han Qingkai | | 0，，： | 1 |
| 10 | Nonlinear stability and bifurcation of multi-DOF chatter system in grinding process显示文摘 | HAN Qingkai YU Tao ZHANG Zhiwei | 2006 | Key Engineering Materials2006，，： | 1 |
| 11 | Dynamics of a geared parallel-rotor system subjected to changing oil-bearing stiffness due to external loads显示文摘 | Zhang Hao Zhai Jingyu Han Qingkai | 2015 | Finite Elements in Analysis and Design2015，，： | 1 |
| 12 | TRANSIENT RESPONSE OF A BI-LAYERED MULTIFERROIC COMPOSITE PLATE显示文摘In this paper,a three-dimensional finite-element formulation for the multiferroic composite is developed and implemented into the commercial software ABAQUS for its transient analysis.First,a special three-dimensional eight-node solid element is designed to handle the multiferroic composite made of elastic,piezoelectric,and piezomagnetic materials.Second,a userdefined subroutine for this newly developed element is implemented into ABAQUS.Finally,the transient responses of a bi-layered multiferroic composite are calculated by using the direct time integration method.Two typical magnetic potential signals,Gauss and Ricker pulses,are applied to the composite with various time durations of excitation.The induced electric field shows that the transient response can be substantially influenced by the input signal,which could be tuned for the strongest electric output. | Ruifeng Wang Qingkai Han Ernian Pan | 2011 | Acta Mechanica Solida Sinica2011，24，1： | 1 |
| 13 | time frequency features of rotor systems with slowly varying mass显示文摘 | Tao Yu Qingkai Han | | 0，，18： | 1 |
| 14 | Vibration measurement and fault analysis of large scale rotating machinery显示文摘 | Han Qingkai Yu Jiancheng Gong Zhaomin | 2003 | Journal of Vibration Measurement Diagnosis2003，23，1： | 1 |
| 15 | Periodic motion stability of a dual-disk rotor system with rub-impact at fixed limiter显示文摘 | Han Qingkai | 2009 | Vibro-Impact Dynamics of Ocean System and Related Problems2009，44，： | 1 |
| 16 | PRESS-based EFOR algorithm for the dynamic parametrical modeling of nonlinear MDOF systems显示文摘 | Haopeng LIU Yunpeng ZHU Zhong LUO Qingkai HAN | 2018 | Frontiers of Mechanical Engineering2018，13，3： | 1 |
| 17 | A Distributed-Centralized Scheme for Short- and Long-Term Spectrum Sharing with a Random Leader in Cognitive Radio Networks显示文摘 | LIANG Qingkai HAN Sihui YANG Feng et at | 2012 | IEEE Journal on Selected Areas of Communications2012，30，11： | 1 |
| 18 | Analytical modeling and vibration analysis of fiber reinforced composite hexagon honeycomb sandwich cylindrical-spherical combined shells显示文摘This study analyzes and predicts the vibration characteristics of fiberreinforced composite sandwich(FRCS)cylindrical-spherical(CS)combined shells with hexagon honeycomb core(HHC)for the first time based on an analytical model developed,which makes good use of the advantage of the first-order shear deformation theory(FSDT),the multi-segment decomposition technique,the virtual spring technology,the Jacobi-Ritz approach,and the transfer function method.The equivalent material properties of HHC are firstly determined by the modified Gibson’s formula,and the related energy equations are derived for the HHC-FRCS-CS combined shells,from which the fundamental frequencies,the mode shapes,and the forced vibration responses are solved.The current model is verified through the discussion of convergence and comparative analysis with the associated published literature and finite element(FE)results.The effects of geometric parameters of HHC on the dynamic property of the structure are further investigated with the verified model.It reveals that the vibration suppression capability can be greatly enhanced by reducing the ratio of HHC thickness to total thickness and the ratio of wall thickness of honeycomb cell to overall radius,and by increasing the ratio of length of honeycomb cell to overall radius and honeycomb characteristic angle of HHC. | Hui LI Bocheng DONG Zhijiang GAO Jing ZHAO Haiyang ZHANG Xiangping WANG Qingkai HAN | 2022 | Applied Mathematics and Mechanics(English Edition)2022，43，9： | 0 |
| 19 | Effect of Pyrolysis Temperature on Resonant Frequency of PDC-SiBCN Ceramic Based Wireless Passive Temperature Sensors显示文摘Wireless passive temperature sensors fabricated by polymer-derived SiBCN ceramic(PDC-SiBCN) pyrolyzed at different temperatures was studied.The resonant frequency of the sensors was measured in the temperature range of50 to 610℃.For the sensor made of the PDC-SiBCN pyrolyzed at 1000,1100 and 1200℃ individually,the resonant frequency decreased monotonically with developing the testing temperature.While for the sensor made of the PDC-SiBCN pyrolyzed at 1300℃,the resonant frequency showed a non-monotonic variation with testing temperature.The results suggest a possibility of tuning the resonant frequency of PDC-SiBCN based wireless passive temperature sensors by altering the pyrolysis temperature. | YU Yuxi HUANG Qifan XIA Fansen SAN Haisheng HAN Qingkai | 2016 | Journal of the Chinese Ceramic Society2016，，4： | 0 |
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