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Applied Mathematics and Mechanics(English Edition) 2024年第8期45卷 1371-1386页

作者： Zeyu CHAI J.T.HAN Xuyuan SONG jian zang Yewei ZHANG Zhen ZHANG College of Aerospace Engineering Shenyang Aerospace UniversityShenyang 110136China Jacobs School of Engineering University of California San DiegoSan Diego CA 92122U.S.A. Key Laboratory of Vibration and Control of Aero-Propulsion System Ministry of EducationNortheastern UniversityShenyang 110819China

A novel X-shaped variable stiffness vibration isolator(X-VSVI)is *** Runge-Kutta method,harmonic balance method,and wavelet transform spectra are introduced to evaluate the performance of the X-VSVI under various *** layer number,the installation angle of the X-shaped structure,the stiffness,and the active control parameters are systematically *** addition,a prototype of the X-VSVI is manufactured,and vibration tests are carried *** results show that the proposed X-VSVI has a superior adaptability to that of a traditional X-shaped mechanism,and shows excellent vibration isolation performance in response to different amplitudes and forms of ***,the vibration isolation efficiency of the device can be improved by appropriate adjustment of parameters.

关键词： bionic vibration isolation X-shaped structure variable stiffness structure nonlinear dynamics prototype experiment

预应力施工技术在道路桥梁施工技术中的实践研究

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大众科学 2024年第2期45卷 115-117页

作者：臧健江苏财经职业技术学院江苏淮安223001

预应力施工技术在道路桥梁的施工中具有重要的实践意义。旨在探讨预应力施工技术在道路桥梁施工中的应用情况和效果,并针对关键问题进行了深入研究。采用实地观察和实验室测试相结合的方法,通过对多个道路桥梁项目的施工过程进行监测和... 详细信息

预应力施工技术在道路桥梁的施工中具有重要的实践意义。旨在探讨预应力施工技术在道路桥梁施工中的应用情况和效果,并针对关键问题进行了深入研究。采用实地观察和实验室测试相结合的方法,通过对多个道路桥梁项目的施工过程进行监测和分析,总结了预应力施工技术在道路桥梁施工中的优点和存在的问题。研究结果表明:预应力施工技术可以有效地提高道路桥梁的承载能力和使用寿命,降低全寿命周期成本。然而,在实践应用中仍存在一些问题,如预应力锚固系统的设计和施工方法的选择等,需要进一步地优化和改进。因此,提出了改进预应力施工技术的建议,以更好地应用于道路桥梁的施工中。总之,预应力施工技术在道路桥梁施工中的实践研究具有重要的理论和实际意义,对于提高道路桥梁的质量和安全性具有重要的推动作用。

关键词：预应力施工技术道路桥梁施工技术应用

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钢筋混凝土高温锈蚀耦合粘结性能试验研究

建材世界 2024年第4期45卷 34-38页

作者：刘琼臧健诸城市建筑业发展中心诸城262200

为深入探究高温锈蚀耦合作用下粘结性能的变化规律,对48个中心拉拔试件进行高温下拉拔试验。结果表明:高温下粘结性能随着温度等级增大呈现减小趋势,随锈蚀率增大而逐渐降低。温度700℃且锈蚀率为6%时,试件粘结强度降低了53.8%。最后,... 详细信息

为深入探究高温锈蚀耦合作用下粘结性能的变化规律,对48个中心拉拔试件进行高温下拉拔试验。结果表明:高温下粘结性能随着温度等级增大呈现减小趋势,随锈蚀率增大而逐渐降低。温度700℃且锈蚀率为6%时,试件粘结强度降低了53.8%。最后,基于试验数据建立了高温-锈蚀耦合作用下的粘结滑移本构方程,得到了服役结构遭受火灾时的粘结性能评估规律。

关键词：高温作用钢筋锈蚀粘结滑移本构模型

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点阵夹芯梁在气动力下的振动控制与能量采集

动力学与控制学报 2024年第7期22卷 38-49页

作者：王祥宇臧健沈阳航空航天大学航空宇航学院沈阳110136

本文提出了一种带有振动控制与能量采集的多功能点阵夹芯梁(Multifunctional-Lattice Sandwich Beam,M-LSB)结构.首先,在点阵夹芯梁内部安装了镍钛合金型非线性能量阱(Nitinol-Nonlinear Energy Sink,N-NES),以实现振动抑制.其次,在梁... 详细信息

本文提出了一种带有振动控制与能量采集的多功能点阵夹芯梁(Multifunctional-Lattice Sandwich Beam,M-LSB)结构.首先,在点阵夹芯梁内部安装了镍钛合金型非线性能量阱(Nitinol-Nonlinear Energy Sink,N-NES),以实现振动抑制.其次,在梁上铺设超磁致伸缩薄片(Giant Magnetostrictive Lamina,GML),通过GML的维拉里效应实现能量采集.根据哈密顿原理和牛顿第二定律,建立了气动环境下耦合系统的运动方程.使用龙格-库塔法计算动力学方程得到了有无N-NES时多功能点阵夹芯梁的时域响应,验证了N-NES的振动控制效果和GML的能量采集效率.结果表明,N-NES可以实现高效的振动抑制,GML可以有效地收集气动环境下点阵夹芯梁的振动能量.

关键词：点阵夹芯梁镍钛合金型非线性能量阱超磁致伸缩薄片能量采集

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Complex dynamics of a harmonically excited structure coupled with a nonlinear energy sink

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Acta Mechanica Sinica 2017年第4期33卷 801-822页

作者： jian zang Li-Qun Chen Shanghai Institute of Applied Mathematics and Mechanics Shanghai University Shanghai 200072 China Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai 200072 China Department of Mechanics Shanghai UniversityShanghai 200444 China

Nonlinear behaviors are investigated for a structure coupled with a nonlinear energy sink. The structure is linear and subject to a harmonic excitation, modeled as a forced single-degree-of-freedom oscillator. The nonlinear energy sink is modeled as an oscillator consisting of a mass,a nonlinear spring, and a linear damper. Based on the numerical solutions, global bifurcation diagrams are presented to reveal the coexistence of periodic and chaotic motions for varying nonlinear energy sink mass and stiffness. Chaos is numerically identified via phase trajectories, power spectra,and Poincaré maps. Amplitude-frequency response curves are predicted by the method of harmonic balance for periodic steady-state responses. Their stabilities are *** Hopf bifurcation and the saddle-node bifurcation are determined. The investigation demonstrates that a nonlinear energy sink may create dynamic complexity.

关键词： bifurcation excited saddle harmonic chaotic oscillator stiffness freedom branches modeled

Resonance response of fluid-conveying pipe with asymmetric elastic supports coupled to lever-type nonlinear energy sink

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Applied Mathematics and Mechanics(English Edition) 2022年第12期43卷 1873-1886页

作者： Runqing CAO Zhijian WANG jian zang Yewei ZHANG Faculty of Aerospace Engineering Shenyang Aerospace UniversityShenyang 110136China

This paper studies the vibration absorber for a fluid-conveying pipe,where the lever-type nonlinear energy sink(LNES)and spring supports are coupled to the asymmetric ends of the *** pseudo-arc-length method integrated with the harmonic balance method is used to investigate the steady-state responses ***,the numerical solution of the fluid-conveying pipe is calculated with the Runge-Kutta ***,a special response,called the collapsible closed detached response(CCDR),is first observed when the vibration response of mechanical structures is ***,the relationship between the CCDR and the main structure primary response(PR)is *** addition,the closed detached response(CDR)is also observed to research the resonance response of the fluid-conveying *** appearance of either the CCDR or the CDR does affect the resonance ***,the mentioned two phenomena underline that the trend of vibration responses under external excitation goes continuous and ***,the main advantage of the LNES is presented by contrasting the LNES with the nonlinear energy sink(NES)coupled to the same pipe *** is found that the LNES can reduce the resonance response amplitude by 91.33%.

关键词： fluid-conveying pipe vibration attenuation collapsible closed detached response(CCDR) lever-type nonlinear energy sink(LNES) elastic support

Nonlinear Vibration Isolation of Spacecraft System by a Bionic Variable-Stiffness Device Enhanced by Electromagnetic Component

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Acta Mechanica Solida Sinica 2023年第6期36卷 921-932页

作者： Zeyu Chai Xuyuan Song jian zang Yewei Zhang College of Aerospace Engineering Shenyang Aerospace UniversityShenyang 110136China

This study addresses the modified bionic vibration isolation technology by introducing the electromagnetic system to simulate biological damping *** has been proven effective in improving the vibration *** assuming the spacecraft-adapter system as a two-degree-of-freedom system,an excellent simplified model can be *** novel bionic vibration isolation device(ABVS-EMVI),which combines an active bionic variable-stiffness device(ABVSVI)with the electromagnetic system,is proposed for the purpose of isolating vibration and harvesting energy at the same *** dynamic equations of the spacecraft-adapter system with ABVS-EMVI are obtained using the Taylor expansion within the framework of the Lagrange equation,and the harmonic balance method is introduced to acquire the amplitude and voltage response of the *** results indicate that the electromagnetic system can enhance the vibration isolation performance and provide energy harvesting *** confirming the ability of ABVS-EMVI to deal with different forms and amplitudes of excitation,the performance of vibration isolation and energy harvesting is investigated in terms of various parameters,and several new conclusions have been drawn.

关键词： Bionic structure Electromagnetic system Vibration isolation Energy harvesting

A Supersonic Aerodynamic Energy Harvester:A Functionally Graded Material Beam with a Giant Magnetostrictive Thin Film

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Acta Mechanica Solida Sinica 2022年第1期35卷 161-173页

作者： Zhengqi Qin Weijiao Chen jian zang Yewei Zhang College of Aerospace Engineering Shenyang Aerospace UniversityShenyang 110136China

In this study,a simply supported functionally graded material beam with a giant magnetostrictive thin film(GMF)was selected as an energy *** on the theory of large deformation and the Villari effect of GMF,piston theory was used to simulate the dynamic equation of the whole structure under supersonic aerodynamic pressure and in a thermal environment by using Hamilton^principle,and the energy harvesting effect of GMF was simulated by using a Runge-Kutta *** the critical flutter velocity,the maximum voltage output and energy harvesting results were discussed as they were affected by external factors such as the geometric model of structure parameters,slenderness ratio,gradient index,number of turns of an electromagnetic coil,airflow velocity,and *** electromechanical coupling coefficient/C33 was 71%.The results show that this proposed harvester can achieve an optimal harvesting effect by adjusting the parameters appropriately,and collect energy in thermal and supersonic environments using the GMF,which provides power to sensors of the health monitoring system of the aircraft’s own structure.

关键词： Supersonic aerodynamic energy harvesting Functionally graded material(FGM)beam Giant magnetostrictive thin film(GMF)

A novel way for vibration control of FGM fluid-conveying pipes via NiTiNOL-steel wire rope

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Applied Mathematics and Mechanics(English Edition) 2023年第6期44卷 877-896页

作者： jian zang Ronghuan XIAO Yewei ZHANG Liqun CHEN College of Aerospace Engineering Shenyang Aerospace UniversityShenyang 110136China Shanghai Institute of Applied Mathematics and Mechanics School of Mechanics and Engineering ScienceShanghai UniversityShanghai 200444China

In this study,a coupling model of fluid-conveying pipes made of functionally graded materials(FGMs)with NiTiNOL-steel(NiTi-ST)for vibration absorption is *** vibration responses of the FGM fluid-conveying pipe with NiTi-ST are studied by the Galerkin truncation method(GTM)and harmonic balance method(HBM).The harmonic balance solutions and the numerical results are ***,the linearized stability of the structure is *** effects of the structure parameters on the absorption performance are also *** results show that the NiTi-ST is an effective means of vibration ***,in studying the effect of the NiTi-ST,a closed detached response(CDR)is first *** is noteworthy that the CDR may dramatically change the vibration amplitude and that the parameters of the NiTi-ST may determine the emergence or disappearance of the *** vibration absorption device can be extended to offer more general vibration control in engineering applications.

关键词： NiTiNOL-steel(NiTi-ST) functionally graded material(FGM)fluid-conveying pipe vibration absorption harmonic balance method(HBM) closed detached response(CDR)

Aeroelastic Properties and Nonlinear Vibration Control of a Simply-Supported Lattice Sandwich Beam Embedded with Nitinol-Steel Wire Ropes

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Acta Mechanica Solida Sinica 2022年第5期35卷 755-764页

作者： Yewei Zhang Xichao Chen Donghui Li jian zang College of Aerospace Engineering Shenyang Aerospace UniversityShenyang110136China

As a novel vibration absorber,Nitinol-steel wire rope(NiTi-ST)has rarely been studied on vibration suppression for lattice sandwich beams in supersonic *** this paper,NiTi-ST with nonlinear stiffness and hysteretic damping is embedded in a lattice sandwich beam to control the beam's *** nonlinear restoring and hysteretic damping force of NiTi-ST are treated as *** dynamic equation is established based on Hamilton's *** amplitude responses of the beam with different NiTi-ST configurations are *** vibration-suppression effects and energy dissipation of lattice sandwich beam with different NiTi-ST configurations under different air velocities are also *** frequency-domain and time-domain methods are used to analyze the structural aeroelastic *** results show that the use of NiTi-ST can significantly suppress excessive vibration of a lattice sandwich beam in supersonic airflow.

关键词： Lattice sandwich beam Nonlinear vibration control Nitinol-steel wire rope Supersonic airflow