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Dynamic response analysis on caisson wharf structure under earthquake 8

Dynamic response analysis on caisson wharf structure under e...

引用

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

作者： Zhai, Qiu Xu, Yafei Wang, Huakun Wang, Peng Hohai Univ Coll Harbor Coastal & Offshore Engn Nanjing Jiangsu Peoples R China

ISBN: (纸本)9781665465533

the caisson wharf's seismic response is an essential issue in the design and construction. the finite element method is used in numerical simulation. the complex internal components of the caisson structure are usually simplified when modeling, and connection between steel and concrete which affect the results are ignored. Based on the project of Putian port, constraint equation method is used in the numerical model, dynamic response of caisson wharf under earthquake is studied and results of static analysis and dynamic time history analysis are obtained. It shows that the proposed numerical modal is more realistic and can obtain more reasonable results. Under seismic action, displacement and stress increase obviously at the beginning of earthquake, and decrease with time until a trend of stability. As the shape mutation, the stress concentration phenomenon occurred at the caisson front toe and back toe, and toes need to be strengthened during design and construction. the results can provide a reference for the seismic design of caisson wharf.

关键词： caisson wharf finite element method seismic load dynamic time history analysis

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Applicability of extended vortex identification methods for two-phase separation in multiphase pump 8

Applicability of extended vortex identification methods for ...

引用

8th International conference on Pumps and Fans, ICPF 2024

作者： Wu, Xitong Li, Chenhao Luo, Xingqi Feng, Jianjun Zhu, Guojun Department of Power Engineering Institute of Water Resources and Hydroelectric Engineering Xi'an University of Technology Xi'an710048 China

In the process of multiphase flow transport, there is a slip velocity between phases, which affects the interphase force and leads to the separation of two phases. In order to analyze the flow structure of phases separation motion, the extended vortex identification methods in a multiphase pump is evaluated. the results show that the generation of two-phase separation structure inside the fluid machinery will seriously affect the phase distribution characteristics of the fluid machinery, and then affect the internal flow field and external performance. the extended vortex identification methods can characterize the intensity, location and evolution of two-phase separation in the pump. the research can offer a pertinent theoretical foundation for subsequent flow analysis and design optimization. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Vortex flow

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Innovative research on the application of TIRZ theory to multi-mode UAVs 8

Innovative research on the application of TIRZ theory to mul...

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8th International conference of Precision Machinery and Manufacturing Technology, ICPMMT 2023

作者： Fang, J. Shiau, Y.R. Hung, W.C. Department of Aerospace and Systems Engineering Feng Chia University Taichung407 Taiwan

According to the current development of Unmanned Aerial Vehicles (UAVs), it can be known that there are no cases where underwater drones and aerial drones are used in parallel. they are all affected by air and water resistance and are easily disturbed in various environments, making it difficult to move effectively. this research uses TRIZ theory to create a multi-modal unmanned vehicle to innovate and improve the existing situation. the type of equipment produced through this research can effectively move in the air, land, and water. the scope includes TRIZ theory, bionic technology, multi-modal innovative design, research, and application of UAV innovation, and monitoring the improvement of its operational resistance through fluid analysis. the output of this research will effectively promote the development of Multi-mode UAVs and improve the problems of existing UAVs. © Published under licence by IOP Publishing Ltd.

关键词： Drones

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An analysis Framework of Stability for the Concrete Gravity Dam in Landfill 8

An Analysis Framework of Stability for the Concrete Gravity ...

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

作者： Ma, Lili Wang, Kuanjun Liu, Haochen Huang, Yupei Zhejiang Univ Hangzhou Peoples R China Zhejiang Univ Architectural Design & Res Inst Co Hangzhou Peoples R China POWERCHINA Huadong Engn Corp Ltd Hangzhou Peoples R China China Railway Eryuan East China Survey & Design C Hangzhou Peoples R China China Energy Enginggering Grp Zhejiang Elect Power Design Inst Co Ltd Hangzhou Peoples R China

ISBN: (纸本)9781665465533

the dam stability is vital to the landfill safety, and its design and analysis generally refer to several relevant specifications. therefore, taking the concrete gravity dam of a typical landfill project in Hangzhou as the background, both limit equilibrium method (LEM) consisting of two simplified calculation modes and strength reduction method (SRM) are adopted to analyze the dam stability. the calculation models are simplified and the resulting ultimate sliding surfaces are similar to each other. the safety factors are 1.474 and 1.469 in the LEM, respectively. However, it is 1.23 in the SRM. the difference can be due to the different calculation mechanism. Considering some actual construction factors, the dam could be identified in a stable state. Finally, the analysis framework of the concrete gravity dam in a landfill is expected to be a reference for similar projects.

关键词： concrete gravity dam landfill stability analysis landfill

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Production analysis for Corrugated Box Manufacturing: Simulation Study in Delhi-NCR 8th

Production Analysis for Corrugated Box Manufacturing: Simula...

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8th International conference on Inventive Communication and Computational Technologies, ICICCT 2024

作者： Soni, Umang Sakhuja, Sumit Soni, Ashu Netaji Subhas University of Technology New Delhi India Chitkara University Chandigarh New Delhi India Bharati Vidyapeeth College of Engineering New Delhi India

ISBN: (纸本)9789819777099

Simulation of real-world operations is a critical prerequisite to strategy and decision-making. the modeling and simulation of such real-world processes are imitated using agents. their time-varying analysis and applications have been discussed in the research work. A significant reduction of problems in the form of fundamental elements plays a key role in the design and modeling of most real-world processes. Manufacturing simulation can be represented using a process modeling approach, which can help approximate a process as a function that displays certain real-world properties of the process over time. the present work first discusses how a process can be modeled using a server and a queue, by creating input through the generation of entities. Using a similar methodology, a discrete event simulation of a cardboard printing factory situated in Delhi-NCR (India) has been demonstrated. Authors observed utilization statistics, the number of entities departed, the average waiting time of goods and the number of entities pending by introducing changes in the manufacturing capacity as part of the experiment. © the Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Smart manufacturing

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design and Dynamic-Static Characteristics analysis of Electric Fuel Pump Boost Valve 8th

Design and Dynamic-Static Characteristics Analysis of Electr...

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8th International conference on Advances in Construction Machinery and Vehicle engineering, ICACMVE 2023

作者： Si, Guolei Li, Binjie Li, Mengru Zhou, Caibo Lu, Liang Zhang, Zize Aerospace Fenghuo Servo Control Technology Corporation Chengdu611130 China School of Mechanical Engineering Tongji University Shanghai200092 China

ISBN: (纸本)9789819718757

In response to the challenges of significant power loss and the difficulty in quickly blocking fuel reverse backflow in one-way valves used in electric fuel systems for aerospace engines, this paper proposes a pump boost valve with a main valve spool designed as a baffle structure and equipped with a backflow damping mechanism. the aim of this boost valve is to achieve flow distribution between the main and auxiliary fuel circuits during engine startup, thereby reducing ineffective power loss. the baffle spool design is implemented to block reverse fuel backflow, while the backflow damping mechanism is incorporated to regulate the dynamic and static characteristics of the boost valve. Based on the proposed design, the working principle is analysed, and a dynamic model is established using AMESim for the modelling and simulation study of the boost valve's dynamic and static characteristics. Comparative experiments are conducted between the newly designed boost valve and traditional boost valves, and the accuracy of the simulation model is validated through experimental verification. the experimental results confirm that the newly designed boost valve outperforms traditional valves in terms of reducing power loss and effectively blocking fuel reverse backflow. Additionally, through the analysis of parameters such as spring stiffness, spool diameter, and backflow damping hole, this study optimises the static and dynamic characteristics of the electric fuel pump. By optimizing these structural parameters, the performance of the electric fuel pump is improved, leading to enhanced stability and responsiveness. © the Author(s) 2024.

关键词： Engines

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Research on the application of CPU control system based on ARM processor in power system 7

Research on the application of CPU control system based on A...

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7th International conference on Advanced Electronic Materials, Computers, and Software engineering, AEMCSE 2024

作者： Shen, Wuqiang Long, Zhenyue Shen, Guiquan Cui, Lei Zhang, Xiaolu Guangdong Power Grid Company Limited Guangdong Guangzhou510000 China Joint Laboratory on Cyberspace Security China Southern Power Grid Guangdong Guangzhou510000 China

ISBN: (纸本)9781510681866

Due to the existence of a large number of different brands and models of equipment and systems in the power system, the CPU control system in the power system is prone to system integration and compatibility problems. In order to ensure the smooth application of CPU control system in electric power system, the research on the application of CPU control system in electric power system based on ARM processor is proposed. the CPU control system architecture of ARM processor is established, and the irregular characteristics and task attributes of computational tasks such as sparse matrix operations in power system topology analysis are analyzed. Subsequently, a general optimization criterion for GPU parallel algorithm design is proposed. Experimental results show that the above CPU control system for topology analysis algorithms in power systems achieves a 6-fold acceleration ratio relative to the 8-threaded CPU algorithm on a 30,000-node system, and more than a 4-fold acceleration in the full process of topology analysis. © 2024 SPIE.

关键词： Power systems computer aided design

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design of Power Delay Efficient Wallace Muliplier 9

Design of Power Delay Efficient Wallace Muliplier

引用

9th International conference on Advanced Computing and Communication systems, ICACCS 2023

作者： Kalamani, C. Dharani Vanjipriya Ishwarya Niranjana, M. Dr. Mahalingam College of Engineering and Technology Department of ECE Coimbatore India Sri Eshwar College of Engineering Department of ECE Coimbatore India

ISBN: (纸本)9798350397376

In applications involving image processing, multipliers are crucial. Area, potency, and delay analysis of the circuit are a few of the different metrics used to describe the performance of digital analysis. the 4-bit AXB is multiplied by a 4X4 Wallace tree resulting in the formation of a fractional creation, which causes an incrimination in latency. the delay is further decremented by inserting a 4-2 compressor in the fractional creation generation phase and it is used to implement 8bit Wallace multiplier to reduce delay. the simulated result shows a decrease in power and delay. © 2023 IEEE.

关键词： Image processing

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A Compact Microstrip Patch Antenna with DGS for Ultra-wideband and Kurz Bands Applications 6

A Compact Microstrip Patch Antenna with DGS for Ultra-wideba...

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6th International conference on Electrical engineering and Information and Communication Technology, ICEEICT 2024

作者： Abir, Fahim Shahriyar Parveen, Rubina Rahman, Mahfujur Hajee Mohammad Danesh Science and Technology University Department of Electronics and Communication Engineering Dinajpur Bangladesh

ISBN: (纸本)9798350385779

this article focuses on the design, analysis, and opti- mization of a broadband antenna exhibiting a -10 dB impedance bandwidth of 29.3 GHz (5.55-34.85 GHz). the antenna consists of a small and compact (12 12 0.8 mm3) geometry constructed on Rogers RT5880 (lossy) substrate with partial DGS (defected ground structure) covering a significant portion of UWB (3.1 GHz to 10.6 GHz), C band (4 GHz to 8 GHz), X band (8 GHz to 12 GHz), Ku band (12 GHz to 18 GHz), K band (18 GHz to 27 GHz), and 5G band (above 24 GHz) used for wireless systems. It exhibits a maximum gain of 4.75 dBi and an average efficiency of 85%. this makes the antenna suitable for diverse modern wireless communication systems, having a wide frequency spectrum. the antenna is designed, simulated, and analyzed with CST-MWS (Computer Simulation Technology-Microwave Studio) Suite 2018. © 2024 IEEE.

关键词： Defected ground structures

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design and CFD Simulation of Heat Transfer in Circular Pipes 8th

Design and CFD Simulation of Heat Transfer in Circular Pipes

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8th International conference on Advances in Construction Machinery and Vehicle engineering, ICACMVE 2023

作者： Ali, Furman Abbas, Munawwar Ali Sun, Bo Chen, Li Hussain, Shahid Department of Mathematics University of Baltistan Skardu16200 Pakistan School of Automotive Studies Tongji University Shanghai201804 China Shanghai Key Lab of Vehicle Aerodynamics and Vehicle Thermal Management Systems Shanghai201804 China School of Mechanical Engineering Tongji University Shanghai201804 China

ISBN: (纸本)9789819718757

A major issue for human growth is the energy crisis. In the current study, circular pipes are considered an energy-efficient technology viable in all seasons. It uses non-constant soil temperature and water flow in coldest regions. this model reports the thermal performance of pipes with different results in hot and cold climates. To degree thermal performance, pipe version changed into advanced and simulated with ANSYS 18.1 Fluid Flow (Fluent). Data was collected from two modelled summer and winter seasons. Continuity, momentum, and energy equation have been used for the simulation. Comparison analysis is also being carried out about the obtained results with previously published articles. the effects of summer and winter temperature and speed on performance were also evaluated. Further, the graphical interpretation is also carried for velocity and pressure distribution. the study highlights a drastic drop in temperature and velocity near the inlet and outlet region while Pressure is inversely proportional to velocity in these regions. It is also obtained from the simulation that the temperature pressure and velocity remain uniform in the fully develop region. © the Author(s) 2024.

关键词： Computational fluid dynamics

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