Comprehensive performance analysis and optimal design of smart light pole for cooperative vehicle infrastructure system

2021 ◽  
Vol 10 (1) ◽  
pp. 904-918
Author(s):  
Ronghui Zhang ◽  
Cong Liu ◽  
Wanting Gou ◽  
Qiang Liu
Keyword(s):  
Lightweight Design ◽  
Theoretical Design ◽  
Industry Standards ◽  
Objective Parameter ◽  
Comprehensive Performance ◽  
Infrastructure System ◽  
Design Requirements ◽  
Light Pole ◽  
Element Theory ◽  
Simulation Practice

Abstract On the basis of the finite element theory, in this study, a theoretical design and simulation practice to carry out steady-state static analysis, structural dynamics analysis, and electromagnetic interferencecharacteristics analysis on smart light poles, is combined. On this basis, a design of modular weight reduction and cost reduction was proposed, which realized the multi-objective parameter optimization of the smart light pole. The simulation results show that the mass of the optimized light pole can be reduced by 14.2%, and the material cost can be reduced by 14.7%. At the same time, the comprehensive performance of the optimized smart light pole can still meet the design requirements of the industry standards. The research results provide a reference for the lightweight design and the comprehensive analysis of the smart light pole in the future.

Smoke Flow Control in Tunnels Using Natural Ventilation

2018 ◽  
Author(s):  
Mark P. Colino ◽  
Elena B. Rosenstein
Keyword(s):  
Natural Ventilation ◽  
Smoke Control ◽  
Smoke Movement ◽  
Design Elements ◽  
Industry Standards ◽  
Emergency Ventilation ◽  
Design Requirements ◽  
Smoke Control System ◽  
Ventilation Systems

This paper provides an overview of the design of natural ventilation systems to control smoke movement in rail tunnels. The paper discusses the current industry standards and design requirements for tunnel emergency ventilation systems, and then addresses the various technical elements that are used to design such systems. These technical elements include parameters in the direct control of the designer, as well as those that are beyond the control of the designer. The paper also presents a case study where various physical design elements are utilized to create a working natural ventilation smoke control system for a short rail tunnel.

Design and Fabrication of an Affordable Transfemoral Prosthetic Leg

2016 ◽  
Vol 842 ◽  
pp. 435-444 ◽  
Author(s):  
Emilio O. Bachtiar ◽  
Tatacipta Dirgantara ◽  
Sandro Mihradi ◽  
Andi Isra Mahyuddin
Keyword(s):  
Optimal Design ◽  
Design Method ◽  
Body Part ◽  
Knee Joints ◽  
Prosthetic Limbs ◽  
Industry Standards ◽  
Final Design ◽  
Normal Human ◽  
Design Requirements ◽  
Analysis System

An invalid is a person with physical or mental abnormalities which hinders their ability of doing normal human activities. One of the aforementioned abnormalities is the loss or malfunction of a body part or organ, such as the human leg. Problems brought about by this disability could be alleviated by the use of prosthetic limbs to restore normal bodily functions [1]. While there are many needs for leg prosthetics in Indonesia, the price of commercially available prosthetic is prohibitively high for most amputees. The current available affordable prosthetics are very basic and employ monocentric knee joints. Here an attempt is made towards acquiring an optimal design of an affordable prosthetic leg using previously developed four-bar knee joint [2,3]. The design is carried out by implementing a systematic design method to arrive at an affordable, yet ones with better performances. The procedure involves a rubric and analyzing various alternatives to arrive at an optimal design conclusion. The evaluation objective is to maximize the performance of the leg and knee prosthetics through an extensive analysis with considerations from various stakeholders, including the potential users, fabricator, and hospitals in Indonesia [4]. The final design of the leg consists of a composite socket, an aluminum pylon, and a solid-ankle cushioned-heel foot design. Its components are modular and compatible with prosthetic industry standards. The knee is made of a combination of polymers and stainless steel and employs a polycentric mechanism in order to satisfy design requirements while keeping costs low [4,5]. The leg and knee were then fabricated according to the analysis results. The total cost of fabrication is approximately 5.5 million IDR, significantly cheaper than commercial prosthetics. The prototype is then tested and examined using a gait analysis system previously developed at Institut Teknologi Bandung by the Biomechanics Research Team [6]. The results show satisfactory performance, albeit with a host of potential improvements.

Focal Points in Supervising Building Intelligent System

2013 ◽  
Vol 739 ◽  
pp. 532-536 ◽  
Author(s):  
Yang Zhang ◽  
Yun Sheng Zhang
Keyword(s):  
Intelligent Systems ◽  
Intelligent System ◽  
Focal Points ◽  
College Hospital ◽  
Medical College ◽  
Industry Standards ◽  
Control Procedures ◽  
Design Requirements ◽  
National Stadium ◽  
Building Engineering

ntelligent systems are becoming main parts in more and more building engineering with the development of economy in China. It is given in this paper that the focal points in supervising intelligent systems of building engineering. Quality control procedures are described in detail, which can ensure that the intelligent system can realize the design requirements and meet the industry standards in the construction, system commissioning and testing. The summary of supervision in this paper comes from a large number of famous building engineering in Beijing, such as the National Stadium, ZhongGuancun Science and Technology Square, Beijing Hospital, Peking Union Medical College Hospital, etc.

The Analysis of Feeding Crossbeam on the Automatic Aluminous-Winding Machine

2013 ◽  
Vol 748 ◽  
pp. 336-340
Author(s):  
Yi Hua Zhang ◽  
Pei Hai Hou ◽  
Tie Qun Duan ◽  
Yuan Gao ◽  
Hui Min Han ◽  
...  
Keyword(s):  
Finite Element ◽  
Virtual Work ◽  
Lightweight Design ◽  
Element Model ◽  
Maximum Load ◽  
Difficult Problem ◽  
Improve Design ◽  
Winding Machine ◽  
Strength And Stiffness ◽  
Element Theory

The feeding crossbeam on the automatic aluminous-winding machine plays a supporting role in the preparation process of feeding pipe, the deformation of the feeding crossbeam have a direct impact on mechanical accuracy, it is difficult problem in model design, which is how to design a reasonable structure and make the crossbeam meets the requirements of strength and stiffness, as well achieve lightweight design. This article considers the complex force of crossbeam, and bases on the principle of virtual work and finite element theory, using ANASYS software to make a finite element model, the relation curves of the stress and the strain under the maximum load are summarized and the stress concentration area is found, The current study provides more reliable results to improve design.

scholarly journals Specimen's Geometry Related Influences on Load-Bearing Capacity of Joining Aluminium and UHSS by Innovative Shear-Clinching

2017 ◽  
Vol 6 (4) ◽  
pp. 19 ◽  
Author(s):  
Rejane Horhold ◽  
Martin Muller ◽  
Marion Merklein ◽  
Gerson Meschut
Keyword(s):  
Lightweight Design ◽  
High Strength ◽  
Single Step ◽  
Economic Conditions ◽  
Automotive Body ◽  
Joining Technology ◽  
Strength Capacity ◽  
Body In White ◽  
Design Requirements ◽  
Manganese Steels

Economic conditions as well as comfort and safety-related requirements lead to lightweight design especially in automotive body-in-white production processes. The consequential multi-material mix limits the reliability of conventional thermal joining technologies. Innovative mechanical joining technologies need to be established. Following the lightweight-design requirements, next step for weight-reduction would be the renunciation of additional elements. Clinching technologies support this idea by creating a form- and force-fitting joint, but are limited to the formability of the joining partners. Joining by forming without additional elements even of hot formed ultra-high-strength manganese steels and ductile aluminium can be realised by shear-clinching. A precisely coordinated tool setup initialises a crack in the die-sided material with limited formability without harming the punch-sided ductile aluminium. This paper presents current and detailed investigations of the influences of mechanical loads on strength capacity of multi-material joints using shear-clinching technologies. The results clearly show the promising potential and challenges of this innovative single-step joining technology for multi-material mixes.

scholarly journals Performance Enhanced Coded OFDM with Almost Linear Inter leaver over Rayleigh Fading Channels

2021 ◽  
Author(s):  
chenggao han
Keyword(s):  
Fading Channels ◽  
Orthogonal Frequency Division Multiplexing ◽  
Rayleigh Fading ◽  
Rayleigh Fading Channels ◽  
Frequency Division ◽  
Industry Standards ◽  
Comprehensive Performance ◽  
Union Bound ◽  
Simulation Results ◽  
Coded Ofdm

This paper presents a comprehensive performance analysis of coded orthogonal frequency division multiplexing (COFDM) over the quasi-static multipath Rayleigh fading channels. We first analyze the pairwise error probability (PEP) of COFDM and then consider the union bound on bit error rate (BER) by introducing the notion of diversity guard (DG) and a novel interleaver class, named almost linear interleaver (ALI). A construction of ALI is also introduced with its parameter selection. Simulation results show that the COFDM with ALI outperforms that with random interleaver (RI) and the block interleaver (BI) adopted in the IEEE industry standards.<br><br>

scholarly journals Guidelines for Topology Optimization as Concept Design Tool and Their Application for the Mechanical Design of the Inner Frame to Support an Ancient Bronze Statue

2021 ◽  
Vol 11 (17) ◽  
pp. 7834
Author(s):  
Abas Ahmad ◽  
Michele Bici ◽  
Francesca Campana
Keyword(s):  
Topology Optimization ◽  
Additive Manufacturing ◽  
Early Stage ◽  
Lightweight Design ◽  
Design Tool ◽  
Design Solution ◽  
Design Activity ◽  
Concept Design ◽  
Bronze Statue ◽  
Design Requirements

For the past few decades, topology optimization (TO) has been used as a structural design optimization tool. With the passage of time, this kind of usage of TO has been extended to many application fields and branches, thanks to a better understanding of how manufacturing constraints can achieve a practical design solution. In addition, the advent of additive manufacturing and its subsequent advancements have further increased the applications of TO, raising the chance of competitive manufacturing. Design for additive manufacturing has also promoted the adoption of TO as a concept design tool of structural components. Nevertheless, the most frequent applications are related to lightweight design with or without design for assembly. A general approach to integrate TO in concept designs is still missing. This paper aims to close this gap by proposing guidelines to translate design requirements into TO inputs and to include topology and structural concerns at the early stage of design activity. Guidelines have been applied for the concept design of an inner supporting frame of an ancient bronze statue, with several constraints related to different general design requirements, i.e., lightweight design, minimum displacement, and protection of the statue’s structural weak zones to preserve its structural integrity. Starting from the critical analysis of the list of requirements, a set of concepts is defined through the application of TO with different set-ups (loads, boundary conditions, design and non-design space) and ranked by the main requirements. Finally, a validation of the proposed approach is discussed comparing the achieved results with the ones carried out through a standard iterative concept design.

scholarly journals Lightweight design and static analysis of lattice compressor impeller

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Yuan Zhang ◽  
Fanchun Li ◽  
Dejun Jia
Keyword(s):  
Lightweight Design ◽  
Beam Diameter ◽  
Limit Condition ◽  
Symmetric Structure ◽  
Lattice Cell ◽  
Compressor Impeller ◽  
Research Goal ◽  
Design Requirements ◽  
Periodic Symmetric Structure ◽  
Different Diameters

Abstract Taking the compressor impeller as the research object and the lightweight design as the research goal, a lattice filled lattice cell suitable for the application of rotating periodic symmetric structure is designed. Its purpose is to make the rigidity and strength of impeller adjustable and reduce the mass of impeller on the premise of meeting the design requirements. The analysis and comparison of unfilled impeller, solid impeller and lattice filled impeller with different diameters were carried out under the limit condition of 80,000 r/min. The results showed that the average circumferential deformation of lattice impeller tip with beam diameter of 0.2 mm, 0.4 mm and 1 mm was 4.84%, 3.49% and 3.71% lower than that of solid impeller. For the impeller with a lattice beam diameter of 0.4 mm, its weight can be reduced by 22.68% compared with the solid impeller. The average circumferential deformation of the tip of the lattice impeller lies between the unfilled impeller and the solid impeller. The results show that the impeller with lattice filling hub can not only reduce the weight effectively, but also improve the efficiency of the compressor.

Analysis of approaches to the organization of lightning protection and grounding systems according to PJSC "Transneft" standards and foreign standards

2021 ◽  
pp. 46-55
Author(s):  
Леонид Юрьевич Могильнер ◽  
Андрей Викторович Рудоманов ◽  
Николай Николаевич Скуридин ◽  
Николай Анатольевич Власов ◽  
Игорь Валерьевич Немчиков
Keyword(s):  
Lightning Protection ◽  
Underground Part ◽  
Grounding System ◽  
Protection Zones ◽  
Regulatory Documents ◽  
Industry Standards ◽  
Protection Systems ◽  
Personnel Safety ◽  
Design Requirements ◽  
Ground Part

Совершенствование мер по защите объектов трубопроводного транспорта нефти и нефтепродуктов от опасного воздействия молний - актуальная научно-практическая задача во всем мире. На основании опыта разработки нормативных документов в области защиты резервуаров и резервуарных парков, других объектов от опасного воздействия молнии, а также практических результатов обследования систем молниезащиты и заземления проведено сравнение требований российских стандартов (в том числе отраслевых стандартов ПАО «Транснефть») и основных стандартов США и стран ЕС по проектированию и эксплуатации систем молниезащиты и заземления резервуарных парков. Установлено, что все стандарты одинаково трактуют назначение систем молниезащиты и заземления, предписывают проводить визуальные осмотры надземной части заземляющих устройств, измерения переходного сопротивления контактов и сопротивления заземляющих устройств, содержат обязательные требования по обеспечению безопасности персонала. В то же время выявлены принципиальные отличия стандартов в России и за рубежом, в том числе в объемах обследования подземной части заземляющих устройств, в использовании изолированных систем молниезащиты резервуаров, а также в применяемых уровнях защиты, методиках расчета зон защиты объектов, периодичности проведения обследований. Сделан вывод о том, что требования к проектированию систем молниезащиты и заземления на объектах ПАО «Транснефть» жестче, а состав работ по обследованию шире, чем установлено зарубежными стандартами. При этом обоснована актуальность данного подхода и его преимущества. Based on experience in the development of regulatory documents of tanks and tank farms, other facilities protection from the dangerous lightning effects, as well as the practical results of lightning protection and grounding system survey, a comparison was made between the requirements of Russian standards (including PJSC Transneft industry standards) and main US and EU standards on the design and operation of lightning protection and grounding systems for tank farms. It has been established that all standards treat the purpose of lightning protection and grounding systems in the same way, prescribe visual inspections of above-ground part of grounding devices, measurements of contact resistance and resistance of grounding devices, and contain mandatory requirements for ensuring personnel safety. At the same time, fundamental differences between Russian and foreign standards were revealed, including the scope of inspection of the underground part of grounding devices, in the use of isolated lightning protection systems for tanks, as well as the applied protection levels, methods for calculating protection zones, and the surveys frequency. It is concluded that design requirements for lightning protection and grounding systems at PJSC “Transneft” facilities are stricter, and scope of survey work is wider than established by foreign standards. At the same time, the relevance of this approach and its advantages are substantiated.

Lightweight Design of PLATE ShearS Bed Based on Topology Optimization and Test Methods

2013 ◽  
Vol 568 ◽  
pp. 143-149
Author(s):  
Yong Wang ◽  
Kun Li ◽  
Bao Ping Cui ◽  
Zu Fang Zhang
Keyword(s):  
Topology Optimization ◽  
Lightweight Design ◽  
Optimization Method ◽  
Maximum Principal Stress ◽  
Test Methods ◽  
Total Displacement ◽  
Design Requirements ◽  
Improvement Scheme ◽  
Different Thickness ◽  
Topology Optimization Method

In order to meet the lightweight design requirements of one swing-type plate shears, the topology optimization method is applied to improve the structure of bed. According to the analysis of the actual working conditions, the reasonable load and boundary conditions are determined. The conceptual model of bed structure is established by using topology optimization method. Lightweight improvement scheme is proposed based on the topology optimization results, and the rationality of scheme is verified by test and analysis. Different parts of the bed are thickened or thinned, and the influences of different thickness of the stiffener on the maximum principal stress, total displacement, displacement in Y direction and weight of bed structure model are analyzed. A reasonable lightweight scheme of shear machine bed is proposed. The weight of the bed is reduced and the lightweight purpose is finally achieved in the case of meeting the requirements of shearing accuracy.

Sign in / Sign up

Export Citation Format

Share Document