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Devising a Procedure for Calculating the Designed Strength of a Kingpin Type Load Carrying System for an Articulated Tractor Container Carrier 设计一种铰接式牵引车主销式载重系统设计强度计算方法
Pub Date : 2020-10-23 DOI: 10.15587/1729-4061.2020.214133
Oleg Beihul, D. Grischenko, V. Beihul, A. Lepetova, D. Chasov, B. Kolyada
The development of a methodology for calculating the designed strength of an unconventional kingpin-type load-carrying system for the articulated tractor container carrier on pneumatic wheels is an important and relevant task due to the unique layout of a given specialized vehicle. The purpose of this work is to devise a procedure for calculating the designed strength of a clip load-carrying system for the articulated tractor container carrier on pneumatic wheels, aimed at building an improved structure with rational metal consumption. The results of the theoretical and experimental studies have determined the most common estimation cases. They include the movement over the technological roads' irregularities along the horizontal section of the road ‒ an estimation case of the semi-trailer frame girders. climbing a high curb at an angle was also considered as an estimation case for the semi-trailer frame girders and cross member. Starting a tractor container carrier forward with an insurmountable obstacle in front of the semi-trailer's wheels was analyzed as an estimation case for the cross member of the frame and the suspension attachment units in the semi-trailer of a tractor container carrier. The result of the reported theoretical and experimental research is the determined load that acts on one cradle structure of the load-carrying system; it forms the torsional rigidity of the frame structure. Underlying the derived mathematical model for each case are the torsional moments and inertia moments that act on the structural elements of the girder in different planes. The mathematical models have been built on the basis of strength conditions for each estimation case and thus form a mathematical formula for determining the wall thickness of the frame girder. The mathematical notation demonstrates the degree of advantage of climbing a high curb at an angle over other estimation cases for the semitrailer frame member and girders. The estimation parameters underlying the mathematical model are meant to prevent the breaking and torsion of the semi-trailer frame in a tractor container carrier
基于气动轮的铰接式牵引车集装箱运输车的设计强度计算方法的发展是一项重要而相关的任务,因为给定的专用车辆具有独特的布局。本工作的目的是设计一个程序来计算气动轮铰接式牵引车集装箱运输车的夹子承载系统的设计强度,旨在建立一个合理的金属消耗的改进结构。理论和实验研究的结果确定了最常见的估计情况。它们包括沿着道路水平部分的技术道路的不规则运动-半挂车框架梁的估计案例。考虑了半挂车框架梁和横梁沿一定角度爬升高路缘的估计情况。分析了牵引式集装箱运输车在半挂车车轮前方存在不可逾越障碍的情况下,对半挂车车架横梁和悬挂附属单元的估计情况。本文的理论和实验研究结果为:确定荷载作用于承载系统的单支架结构;它形成了框架结构的抗扭刚度。在每种情况下推导的数学模型的基础上是作用在不同平面上的梁的结构元件上的扭转矩和惯性矩。根据各估算工况的强度条件,建立了相应的数学模型,形成了确定框架梁壁厚的数学公式。数学符号表明,在一个角度攀上高路缘的优势程度超过其他估计情况下的半挂车框架成员和梁。该数学模型的估计参数是为了防止牵引车半挂车车架的断裂和扭转
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引用次数: 0
Fractal and Metasurface Based Low Profile Circularly Polarized Microstrip Antenna 基于分形和超表面的低轮廓圆极化微带天线
Pub Date : 2020-03-31 DOI: 10.2139/ssrn.3565324
Shashi Kant Pandey, G. P. Pandey, P. M. Sarun
Design of a low-profile and compact circularly polarized microstrip antenna is proposed and investigated based on fractal radiator and high impedance metasurface. Circular polarization and size reduction is achieved by embedding fractal tree like structures at the corners of a square patch. High impedance metasurface is placed at the half of the total height of the FR4 substrate, to enhance the gain of the proposed antenna. Study revealed that the antenna is very compact with layout of 0. 3λ0 x 0.3 λ0 x 0 .012 λ0 at 2.3 GHz, global bandwidth (reflection coefficient, axial ratio and gain bandwidth) of 16 MHz (2.293 GHz - 2.309 GHz) and stable gain of about 2.5 dBic. Proposed Design is single feed and small sized, therefore can be find applications in many portable/IOT wireless communication systems.
提出并研究了一种基于分形辐射体和高阻抗超表面的低轮廓紧凑圆极化微带天线的设计。圆极化和尺寸缩小是通过在正方形斑块的角落嵌入分形树状结构来实现的。高阻抗超表面放置在FR4基板总高度的一半处,以增强所建议天线的增益。研究表明,该天线结构紧凑,布局为0。3λ0 × 0.3 λ0 × 0.012 λ0,全局带宽(反射系数、轴比和增益带宽)为16 MHz (2.293 GHz - 2.309 GHz),稳定增益约为2.5 dBic。提出的设计是单馈源和小尺寸,因此可以在许多便携式/物联网无线通信系统中找到应用。
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引用次数: 0
Influence of Vehicle Inspection Tests on Crashworthiness of School Bus in Nairobi County, Kenya 车辆检验试验对肯尼亚内罗毕县校车耐撞性的影响
Pub Date : 2019-10-31 DOI: 10.2139/ssrn.3517664
Bosire Thomas M, Dr Eng. Herbert Dimo
The vehicle structure, designs and materials on school bus body crashworthiness as regulated by different government agencies in bus body building firms was the topic under research study. In Kenya, thousands of vehicles are involved in vehicle collisions or crashes every year resulting in fatal accidents and severe injuries to the passengers. The specific objective was the influence of vehicle inspection testson crashworthiness of school bus in Nairobi City County. This study adopted Dym’s, Suh’s Axiomatic theory. The pragmatic paradigm and explanatory research design were used. The target population was 1500 respondents from bus body building firms and government regulatory institutions. The sample size was 315 respondents. Questionnaires, interview schedules and observation were data collection instruments. Expert judgment was used to establish validity of the questionnaires. Cronbach’s Alpha Coefficient was used to determine the reliability of the research instrument.  The data collected was analyzed using descriptive and inferential analysis with the aid of SPSS V22 software. The coefficient of determination (R squared) of .206 showing that 20.6% of the variation in crashworthiness of a bus can be explained by vehicle inspection tests. There was a positive significant influence of vehicle inspection tests on crashworthiness of a bus (β=0.396 and p <0.05). The study concluded that the vehicle inspection tests had a significant influence on the crashworthiness of school bus.  The management of school bus body construction companies need to conduct all the terminal test needed before releasing the vehicle in order to enhance crashworthiness of a bus. The Transport authority should examine and check the mandatory requirements and periodically amend them in accordance with the safety, engineering and ecological standardization.
对校车车身制造企业的车身结构、设计和材料对不同政府部门规定的校车车身耐撞性进行了研究。在肯尼亚,每年有成千上万的车辆发生碰撞或撞车事故,导致致命事故和乘客严重受伤。具体目的是研究车辆检验试验对内罗毕市县校车耐撞性的影响。本研究采用Dym’s, Suh’s Axiomatic理论。本文采用了语用范式和解释性研究设计。调查对象是1500名来自巴士车身制造公司和政府监管机构的受访者。样本量为315名受访者。问卷调查、访谈计划和观察是数据收集的工具。采用专家判断法确定问卷的效度。采用Cronbach’s Alpha系数来确定研究仪器的可靠性。采用SPSS V22软件对收集到的数据进行描述性和推理性分析。决定系数(R平方)为0.206,表明客车耐撞性变化的20.6%可以通过车辆检验试验来解释。车辆检验试验对客车耐撞性有显著正影响(β=0.396, p <0.05)。研究表明,车辆检验测试对校车的耐撞性有显著影响。为了提高校车的耐撞性,校车车身制造公司的管理层需要在放行车辆之前进行所有必要的终端测试。交通运输主管部门应根据安全、工程和生态标准对强制性要求进行审查和检查,并定期进行修订。
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引用次数: 1
Design and Analysis of Hydraulic Disc Brakes 液压盘式制动器的设计与分析
Pub Date : 2019-07-14 DOI: 10.2139/ssrn.3419636
Anjali Pillay, Shubham Dhanale
The braking system has to provide enough braking force to completely lock the wheels at the end of a specified acceleration run. The braking system was designed by determining parameters necessary to produce a given deceleration. This particular braking system was designed for an onion harvester which is the theme for SAE-INDIA TIFAN 2019 competition.
制动系统必须提供足够的制动力,以在指定的加速运行结束时完全锁定车轮。制动系统是通过确定产生给定减速所需的参数来设计的。这种特殊的制动系统是为洋葱收割机设计的,这是SAE-INDIA TIFAN 2019比赛的主题。
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引用次数: 0
Design and Analysis of Leaf Spring Suspension System 钢板弹簧悬架系统的设计与分析
Pub Date : 2019-07-14 DOI: 10.2139/ssrn.3419639
Shubham Dhanale, Anjali Pillay
Suspensions are used in vehicles for a comfortable as well as a shock and vibration free ride. Leaf springs are proven to be effective in case of heavy and cyclic loads. In this particular paper the leaf spring suspension system is designed for a heavy weighted onion harvester which is a theme of SAE - INDIA TIFAN 2019 competition. The aim is to design an efficient and compact suspension system which will prevent the fatigue failure of vehicle and which will ultimately bear the load.
悬架在车辆中使用,以获得舒适以及冲击和振动自由乘坐。钢板弹簧已被证明在重载和循环荷载的情况下是有效的。在这篇特别的论文中,钢板弹簧悬挂系统是为重型洋葱收割机设计的,这是SAE - INDIA TIFAN 2019比赛的主题。其目的是设计一种高效、紧凑的悬架系统,以防止车辆的疲劳失效,并最终承受载荷。
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引用次数: 0
Time Factory 一次工厂
Pub Date : 2019-04-25 DOI: 10.2139/ssrn.3417308
R. Petrescu
Have you asked yourself how you will look over 15 years? At the Bosch factory in Jucu, we saw a time machine that can help you to travel for 15 years in the future. And the technologies used seem to have come from the reality of the next decades. This "time machine" is, in fact, part of Bosch's Engineering, Quality and Validation Laboratory (EQV). It's the test room, where the products are "aged" for 15 years to analyze how they can withstand the passage of time and the action of natural phenomena - storm, equatorial rain or frost. The EQV lab concept was created from the idea of synergy between R&D departments and production, a configuration that can provide a holistic view of Bosch products that are being analyzed from the initial development phase of the product until the product returns to the laboratory to investigate possible defects that occurred during their use. "We test the product's resistance to equatorial rain, for example. If it is an electronic component mounted on a machine that will go to South America and we know that there is very high humidity in that area, here we simulate the aging of samples in a more accelerated way, "explains Grasim Robert, head of the analysis group of the EQV lab. But they are not the only tests the products are subjected to. The water resistance of the samples is also done with a very strong 6 bar jet and the water has a force similar to that coming from a fire hose. Other tests check for resistance to different types of dust - for example, Arizona powder is more abrasive and worn plastic components, while ash-containing dust can lead to short-circuits - or saline mist, which activates corrosion mechanisms. In the climatic rooms, explains Grasim Robert, there are several parameters: Time, temperature and humidity. Depending on ISO standards and customer requirements, the test team varies these three physical parameters. There are tests that last for 10-12 months. In other words, a 15-year journey in the future still takes a few months, but taking into account the pace with which technology evolves, it is obvious that this duration is reduced.
你有没有问过自己,15年后你会是什么样子?在聚州的博世工厂,我们看到了一台时间机器,它可以帮助你穿越到未来的15年。而且所使用的技术似乎来自未来几十年的现实。事实上,这台“时光机”是博世工程、质量和验证实验室(EQV)的一部分。这是一个试验室,产品在这里“陈年”15年,以分析它们如何经受住时间的流逝和自然现象的作用——风暴、赤道雨或霜冻。EQV实验室概念源于研发部门和生产部门之间的协同作用,这种配置可以提供博世产品的整体视图,从产品的初始开发阶段开始分析,直到产品返回实验室以调查在使用过程中发生的可能缺陷。“例如,我们测试了产品对赤道雨的抵抗力。如果是安装在运往南美的机器上的电子元件,我们知道该地区的湿度非常高,我们在这里以更快的方式模拟样品的老化,”EQV实验室分析小组负责人格拉西姆·罗伯特解释说。但这些并不是产品要经受的唯一测试。样品的水阻力也用非常强的6巴射流完成,水的力类似于来自消防水带。其他测试检查对不同类型粉尘的抵抗力——例如,亚利桑那粉末是更磨蚀和磨损的塑料部件,而含灰的灰尘可能导致短路——或盐雾,它会激活腐蚀机制。格拉西姆·罗伯特解释说,在气候室里,有几个参数:时间、温度和湿度。根据ISO标准和客户需求,测试团队会改变这三个物理参数。有些测试会持续10-12个月。换句话说,未来15年的旅程仍然需要几个月的时间,但考虑到技术发展的速度,这个时间显然会缩短。
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引用次数: 4
Innovative Layout of Gears for the Optimum Design of Gearbox of a Levelling Machine 整平机齿轮箱优化设计中的齿轮创新布局
Pub Date : 2017-12-21 DOI: 10.2139/ssrn.3101361
Karan Gunti, Sachin C. Kulkarni, Harshil Angre, Vikas S Kamble, Sachin Barve, D. Shukla
This paper delineates the layout and the detailed design of a single input multiple output (SIMO) gearbox for a strip leveller machine. The leveller machine is used to flatten out and level the coiled sheets for finding applications in various industries. Roller leveling is essentially a bending process. The out of flat part, sheet or plate is deformed by a series of alternating bends created by passing the sheet, or plate between upper and lower sets of leveling rollers. The power is transmitted to the rollers from the motor via a gearbox and the outputs of the gearbox are connected to the rollers through spindle shafts with the help of universal joints. The large angle of these universal joints affects its efficiency and thereby decreases its life. Hence this angle is to be reduced and one way of achieving this is by compacting the gearbox. The size is drastically reduced by constructing the layout of the gears in such a way, that the space between the outer surface of the gear and the shaft is utilized by arranging the gears in several lateral and longitudinal planes. The main aim of the paper is to describe this innovative layout and its design verification.
介绍了带材矫直机单输入多输出(SIMO)齿轮箱的布置和详细设计。整平机用于整平和整平卷材,在各个行业中都有应用。轧辊调平本质上是一个弯曲过程。由于在上下两组调平辊之间传递板材或板材而产生的一系列交替弯曲,使不平整的部分、板材或板材变形。动力从电机通过齿轮箱传递给滚筒,齿轮箱的输出通过万向节的帮助通过主轴轴连接到滚筒上。这些万向节的大角度影响其效率,从而降低其寿命。因此,这个角度是要减少,实现这一点的一种方式是通过压缩齿轮箱。尺寸是大大减少,通过构造齿轮的布局这样一种方式,即齿轮和轴的外表面之间的空间是通过安排齿轮在几个横向和纵向平面利用。本文的主要目的是描述这种创新布局及其设计验证。
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引用次数: 0
Something About the Balancing of Thermal Motors 关于热电机平衡的一些问题
Pub Date : 2017-03-15 DOI: 10.3844/AJEASSP.2017.200.217
R. Aversa, R. Petrescu, B. Akash, R. Bucinell, J. Corchado, F. Berto, M. Mirsayar, Guanying Chen, Shuhui Li, A. Apicella, F. Petrescu
Internal combustion engines in line (regardless of whether the work in four-stroke engines and two-stroke engines Otto cycle engines, diesel and Lenoir) are, in general, the most used. Their problem of balancing is extremely important for their operation is correct. There are two possible types of balancing: Static and dynamic balance. The total static to make sure that the sum of the forces of inertia of a mechanism to be zero. There are also a static balance partial. Dynamic balance means to cancel all the moments (load) inertia of the mechanism. A way of the design of an engine in a straight line is that the difference between the crank 180 [°] or 120 [°]. A different type of construction of the engine is the engine with the cylinders in the opposite line, called "cylinder sportsmen". In this type of engine (regardless of their position, which is most often vertical) for engines with two cylinders, one has a static balance total and an imbalance in the dynamic. Similar to the model of the earth concentrated in rotation movement are resolved and load balancing shafts rotating parts. An important way to reduce losses of heat engines is how to achieve a better balance. The methods may be used in equal measure and on engines with external combustion, type Stirling or Watt.
内燃机在生产线上(无论工作在四冲程发动机和二冲程发动机,奥托循环发动机,柴油和雷诺),一般来说,使用最多。它们的平衡问题对它们的操作是否正确至关重要。有两种可能的平衡类型:静态和动态平衡。总静力确保一个机构的惯性力之和为零。也有静态平衡部分。动平衡是指抵消机构的所有力矩(载荷)惯性。发动机在直线上的一种设计方法是使曲柄180度[°]或120度[°]之差。发动机的另一种结构是汽缸在相反的直线上,称为“汽缸运动员”。在这种类型的发动机(不管他们的位置,这是最常见的垂直),发动机有两个汽缸,一个有一个静态平衡总数和一个不平衡的动态。类似于地球集中在旋转运动中的模型,都解决了轴和负载平衡的旋转部件。减少热机损耗的一个重要途径是如何达到一个更好的平衡。这些方法可在同等程度上用于斯特林型或瓦特型外燃发动机。
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引用次数: 59
期刊
EngRN: Mechanical Design (Topic)
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