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Journal of Advance Research in Mechanical & Civil Engineering (ISSN: 2208-2379)最新文献

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Reversible Substation in DC Traction 直流牵引可逆变电站
Pub Date : 2015-04-30 DOI: 10.53555/nnmce.v2i4.331
Priya Sharma
In order to improve the green foot prints and also reduce the operational costs, it is currently standard practice to fit the Rolling stock of Metros railway units with regenerative dynamic braking systems. Thus, energy generated by a braking train can be reused by other accelerating trains. The excess energy is inverted back to the system for use in auxiliary power requirement like lighting lifts, escalator ect in stations. To capture the regenerative energy the popular technology in use are Energy Storage Systems (Batteries, Super capacitors and Fly wheel) and Inverters. For the urban metro rail using DC traction recently a new technology has been used which is known as the “Reversible Electric Sub Stations”. This improves the line receptivity of the DC systems by transferring the excess energy to the AC side. This new technology will make it possible to send that part of the braking energy that is usually burnt in resistors, back into the grid. That is by making the electric substation “reversible”, meaning that they can also operate in the reverse, feeding energy from the braking trains back to the grid. The main benefit is 99% of the regenerated energy is used and the braking resisters in the Rolling stock can be removed, which will in turn reduce the train mass and heat generated.
为了提高绿色足迹并降低运营成本,目前的标准做法是为地铁车辆配备再生动力制动系统。因此,制动列车产生的能量可以被其他加速列车再利用。多余的能量被倒转回系统,用于辅助电力需求,如车站的电梯、自动扶梯等照明。为了捕获可再生能源,目前使用的流行技术是能量存储系统(电池、超级电容器和飞轮)和逆变器。近年来,在城市地铁直流牵引轨道上采用了一种新的技术,即“可逆变电站”。这通过将多余的能量转移到交流侧来提高直流系统的线路接受度。这项新技术将有可能把通常在电阻器中燃烧的那部分制动能量送回电网。这是通过使变电站“可逆”来实现的,这意味着它们也可以反向运行,将制动列车产生的能量反馈给电网。主要的好处是99%的再生能量被利用,并且可以去除机车车辆中的制动电阻,这反过来又会减少列车质量和产生的热量。
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引用次数: 2
Development of Lane Departure Warning Traffic System 车道偏离警告交通系统的开发
Pub Date : 2015-03-31 DOI: 10.53555/nnmce.v2i3.345
P. Balashanmugam, G. Balasubramanian, Dipam Talukdar, Rohit Roy
In road-transport terminology, a lane departure warning system (LDWS) is a mechanism designed to warn a driver when the vehicle begins to move out of its lane on freeways and arterial roads. These systems are designed to minimize accidents by addressing the main causes of collisions: driving error, distraction and drowsiness. In this work the authors present a system which has the potential to reduce fatalities which are caused by the common type of crashes called the Run –Off-Road (ROR) crash. The work is to build a lane Departure Warning System for use on roads and highways. The functioning of the system will be to constantly monitor the car placement in relation to the road marks (with the aid of infrared proximity sensor), detect when the driver drifts away from the current lane without an appropriate warn signal, and provide a quick and effective alert to the driver to take a corrective action. To provide an alert system to trigger the quickest response possible. So the aim of this work is to make an intelligent system in hope to design a safer mean of transportation to save lives wasted on roads yearly, especially with the increase in the number of cars introduced to the roads each year. So the need of such security systems in today’s intelligent cars is essential.
在道路运输术语中,车道偏离警告系统(LDWS)是一种在高速公路和主干道上车辆开始偏离车道时向驾驶员发出警告的机制。这些系统旨在通过解决导致碰撞的主要原因:驾驶失误、分心和困倦,将事故降到最低。在这项工作中,作者提出了一个系统,它有可能减少由常见类型的撞车事故(ROR)造成的死亡人数。这项工作是建立一个车道偏离警告系统,用于道路和高速公路。该系统的功能是(借助红外接近传感器)持续监控车辆与道路标志的位置,检测驾驶员在没有适当警告信号的情况下偏离当前车道,并向驾驶员提供快速有效的警报,以便采取纠正措施。提供警报系统,以尽快作出反应。所以这项工作的目的是做一个智能系统,希望设计一种更安全的交通工具,以挽救每年在道路上浪费的生命,特别是随着每年引入道路的汽车数量的增加。因此,在当今的智能汽车中,这种安全系统的需求是必不可少的。
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引用次数: 0
Study on Performance of Infill Wall Masnory RCC Frame Using Alternative Types of Bricks – A Review 可选砌块填充墙砌体混凝土框架性能研究综述
Pub Date : 2015-03-31 DOI: 10.53555/nnmce.v2i3.358
Dhaval. H. Joravia, K. Parikh
The purpose of this literature review is to study the reduction of base shear and behavior of masonry in seismic loading and the evolution of interlocking brick methodologies and their different shapes. And also study Arrangement of infill walls with RCC frame in plan and elevation and base shear analysis using SAP2000 software. The study includes use of polymer material as make of polymer brick and study of availability of recyclable polymer material.
本文的目的是研究地震荷载作用下砌体基底剪力的减少和性能,以及互锁砖方法的演变及其不同的形状。并对碾压混凝土框架填充墙的平面布置进行了研究,利用SAP2000软件进行了高程和基底剪力分析。研究了高分子材料在高分子砖制造中的应用以及高分子材料可回收性的研究。
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引用次数: 1
Design, Analysis and Fabrication of Quadcopter 四轴飞行器的设计、分析与制造
Pub Date : 2015-03-31 DOI: 10.53555/nnmce.v2i3.342
Prof.A.V. Javir, K. Pawar, Santosh Dhudum, Nitin Patale, Sushant Patil
Quadcopter also known as quadrotor is the next form of helicopters having more dynamic stability than helicopters. They play a predominant role in different areas like surveillance, military operations, fire sensing and some important areas having many complexities. This paper focuses on the aerodynamic effects of quadcopter. It addresses all the aspects of quadcopter ranging from mechanical design to electronics used. It provides backup to the selection of different components with the help of various formulas from research papers. It also gives clear results with respect to weight of components and their corresponding costs. Along with this, finite element analysis is done on the frame so as to sustain the loads generated in the vehicle and concluded that small deformation occurred on the center plates are safe and within the limit.
四旋翼直升机也被称为四旋翼是下一种形式的直升机有更多的动态稳定性比直升机。它们在监视、军事行动、火灾传感和一些复杂的重要领域发挥着主导作用。本文主要研究四轴飞行器的气动效应。它解决了四轴飞行器的所有方面,从机械设计到使用的电子设备。它提供了备份,以选择不同的成分与各种公式的帮助下,从研究论文。它还给出了关于组件重量及其相应成本的明确结果。与此同时,对车架进行了有限元分析,以承受车辆产生的荷载,得出中心板发生的小变形是安全的,在限制范围内。
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引用次数: 33
Investigating the Application of Waste Plastic Bottle as a Construction Material: A Review 废旧塑料瓶作为建筑材料的应用研究综述
Pub Date : 2015-03-31 DOI: 10.53555/nnmce.v2i3.362
A. Raut, Mohammad S. Patel, Nilesh B. Jadhwar, U. Khan, Sagar Wasudeo Dhengare
One of the main disadvantages in constructing houses is high cost of the building. High cost is primary requirement for constructing the house in places where people are below poverty line, is becoming one of the most significant problem of peoples. On the other hand, urbanization growth will increase rubbish especially non-renewable ones. Eco friendly architectural principles are being incorporated into more buildings every day in the world but they are still out of reach of many people due to lack of knowledge and awareness. In this paper we implemented strategies and systems based on Eco-friendly environment that could still be built at very low costs, with waste materials that is plastic bottle, providing adequate thermal comfort while being sustainable. At the end, it concluded that in different factors such as time of execution, load capacity, flexibility, reducing waste, cost and energy efficiency, plastic bottles can be more effective compared to some conventional building materials such as brick, concrete and ceramic blocks.
建造房屋的主要缺点之一是建筑成本高。高成本是贫困地区建房的首要要求,正成为人们面临的最突出问题之一。另一方面,城市化的发展会增加垃圾,尤其是不可再生垃圾。世界上每天都有越来越多的建筑采用环保建筑原则,但由于缺乏知识和意识,许多人仍然遥不可及。在本文中,我们实施了基于环保环境的策略和系统,这些策略和系统仍然可以以非常低的成本建造,废料是塑料瓶,在可持续发展的同时提供足够的热舒适。最后得出结论,在不同的因素,如执行时间,承载能力,灵活性,减少浪费,成本和能源效率,塑料瓶可以比一些传统的建筑材料,如砖,混凝土和陶瓷块更有效。
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引用次数: 24
Static and Rrotordynamic Analysis of Composite Blade Marine Propeller 船用复合叶片螺旋桨静、动特性分析
Pub Date : 2015-03-31 DOI: 10.53555/nnmce.v2i3.363
A. V. Javir, Omkar Omkar, Ashutosh More, B. Lad, N. Todkari, T. Karande
This project work deals with modelling and analysing the propeller blade of a marine vehicle for their strength. A propeller is a complex geometry which requires high end modelling software. The solid model of propeller is developed by using Solidwork 2014 & Matlab R12.The meshing is generated for the model using Ansys. Static and rotordynamic analysis of composite blade propeller is carried out in ANSYS 14.5 software. The stresses obtained are well within the limit of anisotropic property of the materials. The deflection for composite blade propeller is determined. Optimal solution was found by using TAGUCHI method. The critical speed of the propeller is determined using rotordynamic. On comparison which shows that by changing different parameters like speed of shaft and pressure of water on propeller we found optimum solution for the design of propeller.
本项目工作涉及船舶螺旋桨叶片强度的建模和分析。螺旋桨是一个复杂的几何形状,需要高端的建模软件。利用Solidwork 2014和Matlab R12开发了螺旋桨的实体模型。使用Ansys对模型进行网格划分。在ANSYS 14.5软件中对复合叶片螺旋桨进行静、动分析。得到的应力完全在材料各向异性的极限之内。确定了复合叶片螺旋桨的挠度。采用田口法求最优解。利用旋翼动力学方法确定了螺旋桨的临界转速。对比表明,通过改变轴速、螺旋桨水压力等参数,可以找到螺旋桨设计的最佳方案。
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引用次数: 0
Evaluation of Factors Affecting Risk in Real Estate Industry by Relatively Importance Index Method 用相对重要指数法评价房地产行业风险影响因素
Pub Date : 2015-03-31 DOI: 10.53555/nnmce.v2i3.341
Parekh Varunkumar Jagdishbhai
Real estate industry is fragmented, very sensitive to the economic cycles & political environment, and has a significantly high rate of business failure. More than 50% of all the real estate businesses have failed within the first five years as risks associated with their startup are not being considered. Business failure is an extremely disruptive force especially in case of construction industry. Previous studies on construction project risk management (PRM) have focused on the project level rather than the enterprise level. Enterprise Risk Management (ERM) is a process affected by an entity’s board of directors, management and other personnel applied in a creating strategies across the enterprise. The objective of this study was to identify and assess the risk associated with the residential real estate business and also to formulate an enterprise risk management model.
房地产行业是碎片化的,对经济周期和政治环境非常敏感,企业失败率非常高。超过50%的房地产企业在最初的五年内失败,因为他们没有考虑到与创业相关的风险。商业失败是一种极具破坏性的力量,尤其是在建筑行业。以往对建设项目风险管理(PRM)的研究主要集中在项目层面,而不是企业层面。企业风险管理(ERM)是一个过程的影响,一个实体的董事会,管理层和其他人员应用在整个企业的创建战略。本研究的目的是识别和评估与住宅房地产业务相关的风险,并制定企业风险管理模型。
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引用次数: 0
Fabrication and Evaluation of Mechanical Properties of Fe2O3 Particulate Filled Hybrid Composites Fe2O3颗粒填充杂化复合材料的制备及力学性能评价
Pub Date : 2015-03-31 DOI: 10.53555/nnmce.v2i3.360
Vithal Rao Chavan, K. Dinesh, K. Veeresh, Veerabhadrappa Algur, Venkatesh
The researchers are quite concentrating at the hybrid materials. this is mainly due to their applicable benefits have they offer low density, low cost,etc., an experimental investigation was conducted to study the effect of hematite ore and volume fraction on Tensile Strength, Hardness, Impact Strength of Hybrid composite. General Purpose resin or Orthophthalic resin, E-Glass fiber, and Hematite ore are the constitute of hybrid composite. Specimen was cut from the fabricated laminate according to the ASTM standard for different experiments for tensile test, hardness test, and impact test. The laminates are prepared by varying the volume fraction (6%, 8%, 10 %,). The results shown that the incorporation of hematite ore has a strong influence on the properties.
研究人员非常专注于混合材料。这主要是由于它们具有低密度、低成本等适用优势。试验研究了赤铁矿和体积分数对复合材料抗拉强度、硬度、冲击强度的影响。通用树脂或邻苯二甲酸树脂、e -玻璃纤维和赤铁矿构成杂化复合材料。根据ASTM标准从层压板上取下试样进行拉伸、硬度和冲击试验。通过改变体积分数(6%,8%,10%,)制备层压板。结果表明,赤铁矿的掺入对其性能有较大影响。
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引用次数: 0
Efficiency Scores Analysis of Coal Mines using IRS, DRS and Cross Efficiency Models 基于IRS、DRS和交叉效率模型的煤矿效率评分分析
Pub Date : 2015-02-28 DOI: 10.53555/nnmce.v2i2.367
G. Reddy
Economic growth world over is driven by energy, whether in the form of finite resources such as coal, oil and gas or in renewable forms such as hydroelectric, wind, solar and bio-mass or its converted form, electricity(power). Increased energy consumption (especially of electricity) is inevitable with higher GDP growth. Coal was created by the fossilised remains of plants and has high carbon content. DEA is a multi-factor productivity analysis model for measuring the relative efficiency of a homogenous set of coal mines (DMU’s). For every inefficient coal mine, DEA identifies a set of corresponding efficient coal mines that can be utilized as benchmarks for improvement of performance and productivity. Benchmarking and ranking of coal mines based on efficiency scores using advanced DEA models like, Increasing Returns to Scale (IRS), Decreasing Returns to Scale (DRS), Cross Efficiency (CE) Models.
世界各地的经济增长都是由能源驱动的,无论是以煤炭、石油和天然气等有限资源的形式,还是以水力、风能、太阳能和生物质能等可再生形式或其转化形式——电力(动力)的形式。随着GDP的增长,能源消耗(尤其是电力)的增加是不可避免的。煤是由植物的化石残骸产生的,碳含量很高。DEA是一种多因素生产率分析模型,用于衡量一组同质煤矿的相对效率。对于每一个效率低下的煤矿,DEA确定了一组相应的效率较高的煤矿,这些煤矿可以作为提高绩效和生产率的基准。利用先进的DEA模型,如规模收益递增模型(IRS)、规模收益递减模型(DRS)、交叉效率模型(CE),对煤矿的效率评分进行基准测试和排名。
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引用次数: 0
Wind Drift Design Considerations for Steel Framed Structures 钢框架结构的风漂设计考虑
Pub Date : 2014-01-31 DOI: 10.53555/nnmce.v1i1.372
G. Kumar, K. R. Jha, Kanishk Gaur, D. Kumar, Ojesvi Bhardwaj
The world is developing at a very fast pace, also population in urban areas is also increasing with it due to change in demographics, and thus strong and durable buildings are the need of the hour. The design of steel framed buildings must take into consideration the lateral drift of the structure due to wind loading and any serviceability issues that may arise from this lateral movement. This paper focuses on one of these issues, damage to nonstructural components. It is an important issue which may significantly impact the buildings structural performance and economy. Furthermore, because these serviceability issues are not codified, there is a wide variation among design firms in how they are dealt with, leading to a greater economic disparity.
世界正在以非常快的速度发展,由于人口结构的变化,城市地区的人口也在增加,因此坚固耐用的建筑是时代的需要。钢框架建筑的设计必须考虑由于风荷载引起的结构的横向漂移以及这种横向移动可能引起的任何可用性问题。本文重点研究了其中一个问题——非结构构件的损伤。这是一个影响建筑结构性能和经济效益的重要问题。此外,由于这些适用性问题没有被编纂,设计公司之间在如何处理这些问题方面存在很大差异,导致更大的经济差距。
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引用次数: 0
期刊
Journal of Advance Research in Mechanical & Civil Engineering (ISSN: 2208-2379)
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