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检索条件"任意字段=8th Biennial Conference on Engineering Systems Design and Analysis"

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A numerical displacement-based approach for the structural analysis of cable nets 8th

A numerical displacement-based approach for the structural a...

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8th International conference on Structural engineering, Mechanics and Computation (SEMC)

作者： Frigo, B. Fantilli, A. P. Politecn Torino Turin Italy

ISBN: (纸本)9781003348450;9781032391144

A new displacement-based approach is proposed herein to predict the behaviour of pretensioned cable nets subjected to vertical loads. the cables are contained in horizontal plane and have a single degree of freedom in each node, where loads are applied. the model is based on the equilibrium equations of an infinitesimal cable-element, which are solved by considering the catenary equation under the hypothesis of (a) zero bending stiffness, (b) linear elastic behaviour of materials, (c) small deformation, and (d) the existence of perfect hinges in each node. More precisely, a finite-difference numerical procedure is introduced in order to evaluate nodal displacements related to a set of applied vertical forces. the effectiveness of the proposed approach is then assessed by comparing the numerical results with those obtained by other models found in the current literature. Finally, the proposed approach is used to design new and more efficient insulating panels for the green house technology.

关键词： Cables

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Micro-Vibration Prediction and Evaluation analysis of the Structural Foundation of a Precision Instrument Plant Across the Reservoir 8

Micro-Vibration Prediction and Evaluation Analysis of the St...

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8th International conference on Hydraulic and Civil engineering - Deep Space Intelligent Development and Utilization Forum (ICHCE)

作者： Wang, Yingjie Zhang, Hanyun Ji, Yongxing Xiong, Mengqi Shen, Zhengyang Hohai Univ Coll Water Conservancy & Hydropower Engn Nanjing 210098 Peoples R China Arcplus Grp PLC Shanghai 200041 Peoples R China Shanghai Water Engn Design & Res Inst Co Ltd Shanghai 200061 Peoples R China

ISBN: (纸本)9781665465533

the precision instrument plant is usually subjected to micro-vibration excitation by the passing of a high-speed railway, which affects the normal operation and working accuracy of precision instruments in the plant. this paper focuses on the natural vibration characteristics and micro-vibration of a large-scale precision scientific device plant across a reservoir. the whole finite element model of the final designed scheme of heavy bridge and culvert was established. the numerical analysis results show that the first 10 natural frequencies of the concrete structure of the main structure completely avoid the inherent frequency of the site of 5 similar to 10 Hz. the root means square of the comprehensive displacement of the foundation slab of the plant within the frequency of 1 similar to 100 Hz according to the time-history analysis does not exceed 150 nm, which meets the demands of micro-vibration control. Comparing the calculation results of two different damping ratio schemes, it is found that the damping ratio is an important factor in micro-vibration. the chosen designed scheme of heavy bridge and culvert across the reservoir is feasible to control the micro-vibration.

关键词： precision instrument plant natural vibration characteristics micro-vibration heavy bridge and culvert vibration control

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Review on Friction Stir Welding of Titanium Alloys—A Fracture Mechanics Perspective 8th

Review on Friction Stir Welding of Titanium Alloys—A Fractu...

引用

8th International and 29th All India Manufacturing Technology, design and Research conference, AIMTDR 2021

作者： Ganesan, Ramprasad Pothur, Hema Department of Mechanical Engineering Sri Venkateswara University Andhra Pradesh Tirupati517502 India

ISBN: (纸本)9789811976117

the present review article emphasizes the various research works (from the year 1995 to 2020) conducted in joining different types of titanium alloys by using friction stir welding in a systematic approach. the processed material, that is the allotropic forms of titanium alloys and its characteristics, selection of tool materials, pin profiles, and process parameters were reported in detail. the position and orientation-specific material properties, intense cooling mechanisms, effect of heat treatment processes, and the effect of varying workpiece thicknesses were discussed by correlating the influence of microstructural evolution on the mechanical properties. Finally, the recent developments on the investigations of fatigue properties, fracture properties, crack initiation, crack propagations, and fracture failure analysis were being investigated along with the various numerical analyses by using FEM-based software for the prediction of process parameters, calibrated mechanical properties, and comparing the same with the actual experimental results which were reported in detail. © 2023, the Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Friction stir welding

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Optimization of Population Mobility Model of Artificial Society Based on Big Data Analytics 8

Optimization of Population Mobility Model of Artificial Soci...

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8th International conference on Big Data and Information Analytics, BigDIA 2022

作者： Yang, Fang Chen, Bin Chen, Hailiang Ai, Chuan Zhao, Yong College of Systems Engineering National University of Defense Technology Changsha China

ISBN: (数字)9781665487962

ISBN: (纸本)9781665487962

It has become a promising research topic that using the Artificial Society (AS) solves social governance problems such as emergency management, environmental protection, and urban planning. the unceasing evolution of the AS requires high demands for the accuracy of the basic models in AS. With the development of the IoT and data science, researchers can refine the models in AS by contrasting the big data harvested from real society. this paper aims to improve the accuracy of the population mobility model in AS based on the analysis of the real-world dataset about urban population mobility and the comparison between the real-world data and the data generated from AS. To this end, firstly, the datasets are processed and analyzed by Spark. To improve the efficiency in this phase, we design the RDD structure for population mobility data and propose a novel query method, named partition traversal method. then, the population mobility patterns are analyzed and compared, which are extracted from the datasets of real-world and AS, respectively. Based on the diversity between the two patterns, the optimization scheme of the population mobility model is finally proposed by adjusting the workplace selection. this study is an important reference for the modeling and optimization of population mobility in AS. © 2022 IEEE.

关键词： Big data

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Dynamic Vibration analysis of Shape Memory Alloy Wire-Coupled Wind Turbine Blades 8th

Dynamic Vibration Analysis of Shape Memory Alloy Wire-Couple...

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8th International and 29th All India Manufacturing Technology , design and Research conference, AIMTDR 2021

作者： Mani, Yuvaraja Veeraragu, Jagadeesh Department of Mechanical Engineering PSG College of Technology Coimbatore India

ISBN: (纸本)9789811938658

Monitoring vibrational characteristics of the domestic wind turbine blade system under dynamic conditions are a tedious problem. Mitigation of vibration in domestic wind turbine blades is a meticulous process due to the variation of wind speed. the research on the effect of an active control system has depicted a significant vibration reduction. Experimentation on the effect of SMA at dynamic conditions is yet to be elaborately studied. the effect of Shape Memory Alloy (SMA) on vibration control at dynamic conditions is not effectively studied. the influence of super-elastic and shape memory characteristics of SMA at dynamic conditions is evaluated through operational modal analysis. the dynamic model of the tip displacement of the blade, coupled with nacelle movement represented the need for vibration control in the blade system. the experimental dynamic analysis performed on the wind turbine blade system depicted the effect of centrifugal stiffening and the induced frequency shift in the wind turbine blade system. the flapwise mode of the blade was shifted 15% in the operating speed of the turbine. the SMA embedment showed a significant reduction in the vibrational amplitude of the blade. the coupling of SMA wires on the wind turbine blades under passive and active conditions depicted a 57 and 64% reduction in the amplitude of flapwise vibration of the system. © 2023, the Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Vibration control

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Research on Bolt Bending analysis Method Based on FEM 8

Research on Bolt Bending Analysis Method Based on FEM

引用

2022 8th International conference on Mechanical engineering, Materials and Automation Technology, MMEAT 2022

作者： Xu, Lijun Tan, Jinglei JiMei University ChengYi College Xiamen361021 China Aero Engine Corporation of China Shanghai201210 China

In practical engineering, for instance the aerospace aircraft and engine industry, fastener connection is a very common joint structures, the current engineering typical strength analysis for bolt connection structure doesn't include bolt bending analysis. In the engineering research and design phase, if the bolt connection plate is too thick or it contains shims or spacers that cause the bolt itself to be too long, then bolt bending failure analysis is also necessary. the bolt bending analysis is a complex failure mode, there is no unified analysis method for effective assessment for it. this paper introduces an improved calculation method which is proposed to specifically calculate the bending load of the bolt according to the force characteristics of the bolt for bolt bending analysis. © Published under licence by IOP Publishing Ltd.

关键词： Bolts

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analysis of Dynamic Characteristics of Modular Drilling Rig Mast Based on Workbench 8

Analysis of Dynamic Characteristics of Modular Drilling Rig ...

引用

8th International conference on Mechanical engineering and Automation Science, ICMEAS 2022

作者： Fan, Rong-Quan Yang, Lei Dong, Jie Gao, Yun-Kai Li, He-Yu-Qiu Mei, Qi Economic and Technological Research Institute State Grid Sichuan Electric Power Company Chengdu China State Grid Dazhou Power Supply Company State Grid Sichuan Electric Power Company Chengdu China Sichuan University School of Mechanical Engineering Chengdu China

ISBN: (数字)9781665463058

ISBN: (纸本)9781665463058

the mast is an important part of all kinds of hole forming equipment. In addition to bearing the load of the drilling rig, the reaction force and moment of the drilling rig, the mast also protects the transmission parts in the mast, including the sprocket and chain. In order to study the mechanical properties of the drilling rig mast, and provide the basis for the choosing of installation environment and working conditions, take the mast as the research object and build the physical modeling of the mast by using SolidWorks. through modal analysis, transient dynamic analysis and random vibration analysis, the natural frequency and mode shape of the mast and the dynamic response characteristics under the worst working conditions are obtained. It is determined that the mast will not resonate under the excitation of its own vibration and the power head. the hinge joint between the bottom of the mast and the frame is the position of maximum force, and the top of the mast is the area where the maximum deformation occurs. the response characteristics of the mast under dynamic load are determined, which provides a theoretical basis and important reference for the subsequent design of the same type of mast. © 2022 IEEE.

关键词： Dynamic response

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Flight Dynamics and Dual Front Rotor Tilt Mechanism for a Quad Plane UAV 8

Flight Dynamics and Dual Front Rotor Tilt Mechanism for a Qu...

引用

8th International conference on Electrical, Electronics and Information engineering, ICEEIE 2023

作者： Sulistijono, Indra Adji Mahendra, Ade Yogi Risnumawan, Anhar Hanafi, Nofria Politeknik Elektronika Negeri Surabaya Mechatronics Engineering Division Surabaya Indonesia

ISBN: (纸本)9798350340501

this paper presents a quad-plane tilt-rotor innovation, representing an advancement in Unmanned Aerial Vehicle (UAV) design. the quad plane boasts improvements in crucial aspects, including motor placement, motor count, airfoil selection, vehicle typology, and wing and tail configurations. One of the standout features highlighted in our study is its ability to conduct mapping designed explicitly for detailed plant health analysis. What sets it apart is its take-off capability that eliminates the need for launch areas and provides unmatched flexibility during deployment. When operating in fixed-wing mode, the quad plane excels in surveillance missions by ensuring data recording is automatically stored on an SD Card to maintain data integrity from take-off to landing. We employ a PID control method further supported by an IMU sensor to ensure stability during flight control. Integrating a GPS guarantees accuracy by processing satellite-derived radio signals to determine latitude and longitude information. With a flight duration of 15 minutes and reliable control outcomes, the UAV is a game changer in aerial surveillance applications. the quad-plane tilt rotor is more than a technological achievement;it has the potential to completely transform agricultural methods in Indonesia, tackling the issues of diminishing yields and rice production. Our research indicates that this unmanned aerial vehicle (UAV) is on the verge of establishing benchmarks in monitoring and analysis. © 2023 IEEE.

关键词： three term control systems

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Prediction of Mechanical Behaviour of AA 3003-O with Varying Volume Fractions of White Fly Ash and SiC 8th

Prediction of Mechanical Behaviour of AA 3003-O with Varying...

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8th International and 29th All India Manufacturing Technology, design and Research conference, AIMTDR 2021

作者： Ilanthirayan, P. Kalayarasan, M. Mohanraj, S. Department of Mechanical Engineering PSG College of Technology Coimbatore641 004 India

ISBN: (纸本)9789811945700

the mechanical and wear behaviour of a hybrid (AA 3003-O) aluminium alloy composite with parameters such as different volume fractions of white fly ash and SiC particles alongside varied particle sizes of SiC were optimized using the Taguchi method. In contrast to experiments with grey fly ash, white fly ash has been utilized in this study to prepare the hybrid composite. the tensile strength was measured experimentally in accordance with the resulting aluminium hybrid composites from the L9 orthogonal array. the orthogonal array analysis of variance and signal-to-noise ratio was used to study the individual effect of parameters on reinforced aluminium hybrid composites. the predicted values of optimal combination on testing parameters obtained through the Taguchi approach have a close correlation to that of experimentally observed values. It was also observed that the mathematical models developed were found to have statistically significance. © 2023, the Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Tensile strength

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Loss analysis of ANPC Inverters with Hybrid Si and WBG Devices 8th

Loss Analysis of ANPC Inverters with Hybrid Si and WBG Devic...

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8th International conference on Life System Modeling and Simulation, LSMS 2024 and 8th International conference on Intelligent Computing for Sustainable Energy and Environment, ICSEE 2024

作者： Zhang, Yifei Li, Kang Zhang, Li School of Electronic and Electrical Engineering University of Leeds LeedsLS29JT United Kingdom

ISBN: (纸本)9789819602247

High efficiency, high output waveform quality and low stress switching are among the principal requirements for the power converter design. this paper investigates the design and control of a 3-level Active Neutral Point Clamped (ANPC) grid-tied inverters to meet these requirements. A new PWM switching strategy is designed for power loss reduction in the control of ANPCs that use hybrid Si and WBG switching devices. the locations of switching devices made of different materials in the circuit are investigated, and the power losses and switching stresses under different PWM control strategies are compared. the power losses due to both conduction and switching for each switching device and the whole circuit are evaluated. Simulation results confirm that both the converter design and the PWM control strategy need to be optimized together for the best trade-off among different objectives, such as the power losses and the cost. © the Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： Hybrid power

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