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Parameters Optimization and Performance Evaluation of the Tuned Inerter Damper for the Seismic Protection of Adjacent Building Structures

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工程与科学中的计算机建模(英文) 2024年第1期138卷 551-593页

作者： Xiaofang Kang Jian Wu Xinqi Wang Shancheng Lei Key Laboratory of Intelligent Underground Detection Technology School of Civil EngineeringAnhui Jianzhu UniversityHefei230601China Chengnan College Changsha University of Science and TechnologyChangsha410015China

In order to improve the seismic performance of adjacent buildings,two types of tuned inerter damper(TID)damping systems for adjacent buildings are proposed,which are composed of springs,inerter devices and dampers in serial or in *** dynamic equations of TID adjacent building damping systems were derived,and the H2 norm criterion was used to optimize and adjust them,so that the system had the optimum damping performance under white noise random *** TID frequency ratio and damping ratio as optimization parameters,the optimum analytical solutions of the displacement frequency response of the undamped structure under white noise excitation were *** results showed that compared with the classic TMD,TID could obtain a better damping effect in the adjacent *** the TIDs composed of serial or parallel,it was found that the parallel TIDs had more significant advantages in controlling the peak displacement frequency response,while the H2 norm of the displacement frequency response of the damping system under the coupling of serial TID was *** the adjacent building composed of two ten-story frame structures as an example,the displacement and energy collection time history analysis of the adjacent building coupled with the optimum design parameter TIDs were carried *** was found that TID had a better damping effect in the full-time range compared with the classic *** paper also studied the potential power of TID in adjacent buildings,which can be converted into available power resources during earthquakes.

关键词： Adjacent buildings tuned inerter damper(TID) H2 norm optimization vibration control energy harvesting

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MXene-enhanced environmentally stable organohydrogel ionic diode toward harvesting ultralow-frequency mechanical energy and moisture energy

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SusMat 2023年第6期3卷 859-876页

作者： Jianyu Yin Nishuang Liu Peixue Jia Ziqi Ren Qixiang Zhang Wenzhong Lu Qianqian Yao Mingfang Deng Yihua Gao School of Physics&Wuhan National Laboratory for Optoelectronics(WNLO) Huazhong University of Science and Technology(HUST)WuhanChina

With the accelerating advancement of distributed sensors and portable electronic devices in the era of big data,harvesting energy from the surrounding environment to power electrical devices has become increasingly ***,most mechanical energy harvesters often require high operating frequencies to function ***,for practical applications,the survivability of devices in harsh operating environments is a vital issuewhich must be ***,the single-stimulus responsiveness limits their further applications in complex external ***,a pressure and moisture dual-responsive ionic diode consisting of two organohydrogels with opposite charges as an energy harvester is *** organohydrogel ionic diode utilizes the migration of cations and anions to form the depletion zone and followed by an enhancement of the built-in potential along the depletion zone as a result of mechanical stress or humidity,converting ultralow-frequency mechanical energy or moisture energy into electrical ***,this mechanism is further confirmed by the finite element *** the increased rectification ratio due to the introduction of MXene,the ionic diode exhibits a relatively large output current(∼10.10μA cm^(−2))and power density(∼0.10μW cm^(−2))at a mechanical pressure of 0.01 Hz,outperforming most currently available mechanical energy *** impressively,the incorporation of ethylene glycol provides the hydrogel ionic diode with excellent temperature tolerance and long-term environmental *** organohydrogel ionic diode can also be applied as a moisture-driven power generator and self-powered humidity *** study presents promising prospects for the efficient collection of renewable and sustainable energy and the practical application of hydrogel-based energy harvesters in extreme environments.

关键词： energy harvesting environmentally stable ionic diode organohydrogel ultralow frequency

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Unleashing the Potential of Unidirectional Mechanical Materials: Breakthroughs and Promising Applications

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Materials Sciences and Applications 2024年第4期15卷 66-86页

作者： Sunil Harripersad SBCS Global Learning Institute Limited Port of Spain Trinidad & Tobago Faculty of Mechanical Engineering Atlantic International University Honolulu Hawaii USA Faculty of Science American Association for the Advancement of Science (AAAS) Washington D.C. USA Department of Planning RCA and R&D Coosal&#8217s Group of Companies Port of Spain Trinidad and Tobago Caterpillar Engineering Technicians for the World Program Irving Texas USA Faculty of Engineering TECH Technological University Tenerife Spain

The emergence of mechanically one-way materials presents an exciting opportunity for materials science and engineering. These substances exhibit unique nonreciprocal mechanical responses, enabling them to selectively channel mechanical energy and facilitate directed sound propagation, controlled mass transport, and concentration of mechanical energy amidst random motion. This article explores the fundamentals of mechanically one-way materials, their potential applications across various industries, and the economic and environmental considerations related to their production and use.

关键词： Mechanically One-Way Materials Nonreciprocal Mechanical Responses Directed Sound Propagation Controlled Mass Transport energy harvesting Structural Engineering Economic Viability Environmental Impact

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Ultra-robust triboelectric nanogenerator for harvesting rotary mechanical energy

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Nano Research 2018年第5期11卷 2862-2871页

作者： Xinyu Du Nianwu Li Yuebo Liu Jiaona Wang Zuqing Yuan Yingying Yin Ran Cao Shuyu Zhao Bin Wang Zhong Lin Wang Congju Li Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences National Center for Nanosdence and Technology (NCNST) Beijing 100083 China School of Materials Science & Engineering Beijing Institute of Fashion Technology Beijing 100029 China School of Material Science and Engineering Georgia Institute of Technology Atlanta Georgia 30332-0245 USA University of Chinese Academy of Sciences Beijing 100049 China

Triboelectric nanogenerators （TENGs） for harvesting rotary mechanical energy are mostly based on in-plane sliding or free-standing mode. However, the relative displacement between two contacting triboelectric layers causes abrasion, which lowers the output power and reduces service life. Therefore, it is important to develop a method to minimize abrasion when harvesting rotary mechanical energy. Here, we report a scale-like structured TENG （SL-TENG）, in which two triboelectric layers work under a contact-separation mode to avoid in-plane relative sliding in order to minimize abrasion. As a result, the SL-TENG exhibits outstanding robustness. For example, the output voltage of the SL-TENG does not exhibit any measurable decay although this output has been continuously generated through more than a million cycles. Moreover, at a very low rotation rate of 120 rpm, the SL-TENG can generate a maximum short-drcuit current of 78 μA, delivering an instantaneous power density of 2.54 W/m^2 to an external load. In relation to this, a Li-ion battery was charged using the SL-TENG. After a 30-rain charging time, the battery achieved a discharge capacity of 0.1 mAh. Through a power management circuit integrated into the SL-TENG, a continuous direct current （DC） of 5 V is outputted, providing sufficient DC power for driving a radio-frequency wireless sensor and other conventional electronics.

关键词： nanogenerator ultra-robust energy harvesting rotary motions scale-like structure

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harvesting energy from Asphalt Pavement by Piezoelectric Generator

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Journal of Wuhan University of Technology(Materials Science) 2014年第5期29卷 933-937页

作者：赵鸿铎 TAO Yujie NIU Yanliang LING Jianming Key Laboratory of Road and Traffic Engineering of Ministry of Education Tongji University

This paper presents the way to harvest mechanical energy from asphalt pavement by piezoelectric generator. Results show that the potential energy in asphalt pavement can be up to 150 kW/h per lane per kilometre. Part of the mechanical energy can be harvested by piezoelectric transducers. The performance of seven typical transducers is examined through finite element analysis. Results show that PZT piles and multilayer, cymbal and bridge can work in asphalt pavement environment. PZT piles and multilayer have higher energy converting rate, However, the total harvested energy is small if these transducers are embedded directly in pavement. A prototype pavement generator is developed using PZT piles to increase the harvested energy. The generator can harvest more than 50 kW/h energy from the pavement under heavy traffic. 8-16 PZT piles are recommended for one generator. Round shape is suggested for the PZT piles to reduce the concentration of stress. And multilayer structure is recommended for PZT piles to decrease the electric potential of generator. The generator can be extended as sensor in the asphalt pavement, which can be used to monitor the traffic, pavement stress and temperature.

关键词： asphalt pavement energy harvesting piezoelectric generator finite element analysis

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Enhanced galloping energy harvester with cooperative mode of vibration and collision

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Applied Mathematics and Mechanics(English Edition) 2022年第7期43卷 945-958页

作者： Qiong WANG Zewen CHEN Linchuan ZHAO Meng LI Hongxiang ZOU Kexiang WEI Xizheng ZHANG Wenming ZHANG Hunan Provincial Key Laboratory of Vehicle Power and Transmission System Hunan Institute of EngineeringXiangtan 411104Hunan ProvinceChina State Key Laboratory of Mechanical System and Vibration School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China

The low power and narrow speed range remain bottlenecks that constrain the application of small-scale wind energy *** paper proposes a simple,lowcost,and reliable method to address these critical issues.A galloping energy harvester with the cooperative mode of vibration and collision(GEH-VC)is presented.A pair of curved boundaries attached with functional materials are introduced,which not only improve the performance of the vibration energy harvesting system,but also convert more mechanical energy into electrical energy during *** beam deforms and the piezoelectric energy harvester(PEH)generates electricity during the flow-induced *** addition,the beam contacts and separates from the boundaries,and the triboelectric nanogenerator(TENG)generates electricity during the *** order to reduce the influence of the boundaries on the aerodynamic performance and the feasibility of increasing the working area of the TENG,a vertical structure is *** the wind speed is high,the curved boundaries maintain a stable amplitude of the vibration system and increase the frequency of the vibration system,thereby avoiding damage to the piezoelectric sheet and improving the electromechanical conversion efficiency,and the TENG works with the PEH to generate *** the boundaries can protect the PEH at high wind speeds,its stiffness can be designed to be low to start working at low wind *** electromechanical coupling dynamic model is established according to the GEH-VC operating principle and is verified *** results show that the GEH-VC has a wide range of operating wind speeds,and the average power can be increased by 180%compared with the traditional galloping *** GEH-VC prototype is demonstrated to power a commercial temperature *** study provides a novel perspective on the design of hybrid electromechanical conversion mechanisms,that is,to combine and collaborate based on their respective char

关键词： energy harvesting wind energy galloping piezoelectric energy harvester(PEH)

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Recent Advances and Challenges Toward Application of Fibers and Textiles in Integrated Photovoltaic energy Storage Devices

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Nano-Micro Letters 2023年第3期15卷 190-247页

作者： Amjid Rafique Isabel Ferreira Ghulam Abbas Ana Catarina Baptista CENIMAT|I3N Department of Materials ScienceSchool of Science and TechnologyNOVA University LisbonCampus de Caparica2829‑516 CaparicaPortugal

Flexible microelectronic devices have seen an increasing trend toward development of miniaturized,portable,and integrated devices as wearable electronics which have the requirement for being light weight,small in dimension,and *** three-dimensional(3D)and two-dimensional(2D)electronics gadgets fail to effectively comply with these necessities owing to their stiffness and large *** have come up with a new family of one-dimensional(1D)flexible and fiber-based electronic devices(FBEDs)comprising power storage,energy-scavenging,implantable sensing,and flexible displays ***,development and manufacturing are still a challenge owing to their small radius,flexibility,low weight,weave ability and integration in textile *** paper will provide a detailed review on the importance of substrates in electronic devices,intrinsic property requirements,fabrication classification and applications in energy harvesting,energy storage and other flexible electronic ***-and textile-based electronic devices for bulk/scalable fabrications,encapsulation,and testing are reviewed and presented future research ideas to enhance the commercialization of these fiber-based electronics devices.

关键词： Flexible electronics Electronic textiles energy harvesting Supercapacitors Photovoltaic devices

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Distributionally robust optimization based chance-constrained energy management for hybrid energy powered cellular networks

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Digital Communications and Networks 2023年第3期9卷 797-808页

作者： Pengfei Du Hongjiang Lei Imran Shafique Ansari Jianbo Du Xiaoli Chu The Engineering Research Center of Intelligent Air-ground Integrated Vehicle and Traffic Control Ministry of EducationXihua UniversityChengdu610039China Chongqing Key Lab of Mobile Communications Technology Chongqing University of Posts and TelecommunicationsChongqing400065China James Watt School of Engineering University of GlasgowGlasgowG128QQUK Shaanxi Key Laboratory of Information Communication Network and Security Xi'an University of Posts and TelecommunicationsXi'an710121China Electronic and Electrical Engineering University of SheffieldSheffieldS102TNUK

energy harvesting has been recognized as a promising technique with which to effectively reduce carbon emis-sions and electricity expenses of base ***,renewable energy is inherently stochastic and inter-mittent,imposing formidable challenges on reliably satisfying users'time-varying wireless traffic *** addition,the probability distribution of the renewable energy or users’wireless traffic demand is not always fully known in *** this paper,we minimize the total energy cost of a hybrid-energy-powered cellular network by jointly optimizing the energy sharing among base stations,the battery charging and discharging rates,and the energy purchased from the grid under the constraint of a limited battery size at each base *** solving the formulated non-convex chance-constrained stochastic optimization problem,a new ambiguity set is built to characterize the uncertainties in the renewable energy and wireless traffic demands according to interval sets of the mean and *** this ambiguity set,the original optimization problem is transformed into a more tractable second-order cone programming problem by exploiting the distributionally robust optimization ***,a low-complexity distributionally robust chance-constrained energy management algo-rithm,which requires only interval sets of the mean and covariance of stochastic parameters,is *** results of extensive simulation are presented to demonstrate that the proposed algorithm outperforms existing methods in terms of the computational complexity,energy cost,and reliability.

关键词： Cellular networks energy harvesting energy management Chance-constrained Distributionally robust optimization

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Self-powered forest ambient monitoring microsystem based on wind energy hybrid nanogenerators

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Science China(Technological Sciences) 2022年第10期65卷 2348-2360页

作者： LI BoYuan QIU Yu HUANG Peng TANG WenJie ZHANG XiaoSheng School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 611731China

In response to the call for zero-carbon energy supply for Internet of Things(IoTs)applications and to get rid of the dependence of traditional distributed IoTs devices on batteries,the invention of nanogenerators that can convert wind energy in the surrounding environment into electrical energy have received widespread ***,a wind energy hybrid harvester(WH-EH)combining a soft-friction and positive-directional triboelectric nanogenerator(SP-TENG)and a hierarchical rotating electromagnetic nanogenerator(HR-EMG)is reported to construct a self-powered forest environment monitoring *** the design of thin inner wall beams and comb-shaped electrodes,the SP-TENG is able to change the output into positivedirectional,which can be stored directly in the energy storage device,breaking the limitation of the alternating positive and negative output of conventional *** addition,the HR-EMG embeds coils in the cup lid to make the most of the available space in the external *** the WH-EH,a layered structure,including the HR-EMG and SP-TENG is adopted to jointly utilize wind energy for both higher output and higher *** order to effectively implement wireless monitoring of the forest environment,the WH-EH is further utilized to develop a self-powered forest environment monitoring microsystem by powering the IoTs sensor nodes,realizing ambient temperature and humidity sampling and wireless transmission,so as to achieve the purpose of preventing forest *** is believed that the development of the WH-EH and the self-powered forest environment monitoring microsystem provides diverse options for the practicalization of self-powered IoTs systems and the energy supply problem of IoTs sensor networks.

关键词： self-powered nanogenerator MEMS energy harvesting microsystem

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An Efficient energy Aware Routing Mechanism for Wireless Body Area Networks

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Computers, Materials & Continua 2022年第1期70卷 1111-1126页

作者： Wejdan Wasel Aljaghthami Mohammad Haseeb Zafar Afraa Zuhair Attiah Faculty of Computing and Information Technology King Abdulaziz UniversityJeddah21589Saudi Arabia

The accelerated development of wireless network technology has resulted in the emergence of Wireless Body Area Network(WBAN),which is a technology commonly used in the medical *** consists of tiny sensor nodes that interconnect with each other and set in the human body to collect and transmit the patient data to the physician,to monitor the patients *** nodes typically have limited battery energy that led to a shortage of network ***,energy efficiency is considered one of the most demanding challenges in routing design for *** proposed routing mechanisms inWBAN did not cover the source node energy and energy harvesting ***,this study proposes an Efficient energy Aware Routing(EEAR)*** paper constructs a path cost function that considers three parameters:residual energy,number of hops to the sink,and the distance between the ***,data aggregationwith filtration and hybrid energy harvesting technique are used to extend the network lifetime,reduce the network traffic load,andmaintain the source node *** simulations using MATLAB have been performed to evaluate the performance of the proposed *** is contrasted with the two latest schemes,called Priority-based Congestion-avoidance Routing Protocol(PCRP)and energy Efficient Routing Protocol(EERP).The results show the significant performance of theEEARmechanism in terms of network lifetime,residual energy,network stability,and throughput.

关键词： Wireless body area network routing protocol energy efficiency network lifetime energy harvesting

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