International Journal of Mechanical Engineering and Applications最新文献_第4页

Structural Design of a CNC Router Based on Optimization Technique 基于优化技术的数控铣床结构设计

International Journal of Mechanical Engineering and Applications Pub Date : 2020-06-18 DOI: 10.11648/J.IJMEA.20200803.11

N. H. Loc, T. Thủy

{"title":"Structural Design of a CNC Router Based on Optimization Technique","authors":"N. H. Loc, T. Thủy","doi":"10.11648/J.IJMEA.20200803.11","DOIUrl":"https://doi.org/10.11648/J.IJMEA.20200803.11","url":null,"abstract":"Optimizations are a powerful tool for engineers as well as product designers. Using optimization helps us to find out new concept designs that satisfy the requirements of functions, aestheticism, material, cost, and time. This paper gives an overview of structural optimization and its effects on the design process, provides the process and application of the topology optimization as well as its ability and importance in design to improve product and product design processes in general and CNC router in particular. Application of optimization methods includes topology, shape, and size optimization to design the structures of the CNC router. The results have built the optimization design process of CNC router structure, secured material reduction, as well as improved shape and size of CNC router structure. In the framework of this paper, the high applicability of structural optimization in the design of the CNC router structure will be properly introduced. Simulation for structural design and analysis has developed according to the strong and widespread application of computers and flexible application of CAD/CAID/CAE software in design has proven superior advantages compared to previous methods. The obtained results not only ensure the technical and aesthetic requirements of the design but also reduce the material.","PeriodicalId":398842,"journal":{"name":"International Journal of Mechanical Engineering and Applications","volume":"151 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127287372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on Optimization of Automobile Crash Box Considering the Influence of Strain Rate 考虑应变率影响的汽车碰撞箱优化研究

International Journal of Mechanical Engineering and Applications Pub Date : 2020-06-10 DOI: 10.11648/j.ijmea.20200802.13

Chih-Keng Chen, Yu-Jie Ma

{"title":"Study on Optimization of Automobile Crash Box Considering the Influence of Strain Rate","authors":"Chih-Keng Chen, Yu-Jie Ma","doi":"10.11648/j.ijmea.20200802.13","DOIUrl":"https://doi.org/10.11648/j.ijmea.20200802.13","url":null,"abstract":"The strain rate is one of the main factors that determines the yield strength of the material, which has a great influence on the accuracy of the numerical simulation of the automobile crash box. The numerical simulation of the crash box considering the strain rate of the material is carried out, and found that the impact force on the longitudinal beam of the car body is large and the energy absorption ability is small during the collision process. Through two sets of optimization studies, the results show that increasing the double-sided convex groove at the proper position of the front crash box can effectively reduce the impact force transmitted to the car body at the initial stage of the collision, and at the same time reduce the energy absorption ability of the crash box; Adding double-sided grooves at the front crash box can make the crash box collapse smoothly, cut down the collision force transmitted to the car body, and increase the energy-absorbing ability. At the same time, the results of the two optimization designs are verified by the methods: the sense of crushing deformation and the average square of all nodes velocity.","PeriodicalId":398842,"journal":{"name":"International Journal of Mechanical Engineering and Applications","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126178076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Bearing Box Process Specification and Tooling Design 轴承箱工艺规程及模具设计

International Journal of Mechanical Engineering and Applications Pub Date : 2020-05-15 DOI: 10.11648/j.ijmea.20200802.12

Z. Cong

{"title":"Bearing Box Process Specification and Tooling Design","authors":"Z. Cong","doi":"10.11648/j.ijmea.20200802.12","DOIUrl":"https://doi.org/10.11648/j.ijmea.20200802.12","url":null,"abstract":"Reasonable process regulations and fixtures can ensure the high efficiency of parts processing and the economy of the enterprise. I started with data collection, then part analysis, then process design, then process specification design, and finally fixture design. In the process design, I obtained the best process route based on the experience of the production site to achieve the effect of saving time and increasing labor productivity. The design of the process specification was based on the production program, the production type was determined, and the process specification was compiled. Production, so the process card of parts and the card of machining process of parts were compiled. The fixture design is to design two sets of tools for the bearing box car mold and the bearing box drilling mold. The bearing box car mold is based on the processed large surface and the two right angle surfaces are used as positioning surfaces. The workpiece is fastened with bolts and nuts. The other large surface is up to size 70, φ180H7 holes; the bearing box drilling mold is based on the processed large surface, and is positioned at φ180H7 holes. The workpiece is fastened with bolts and nuts, and 6-φ13 holes are drilled to improve the part. Processing efficiency to ensure the quality of parts processing. In summary, the above-mentioned special fixture design scheme is adopted to ensure the production requirements of parts in batches and improve labor efficiency.","PeriodicalId":398842,"journal":{"name":"International Journal of Mechanical Engineering and Applications","volume":"56 1-2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123628585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Externally Pressurized Thrust Spherical Bearing Performance Under Variable Lubricant Viscosity (Un-recessed Clearance Type) 可变润滑油粘度下外压推力球面轴承性能(非凹隙型)

International Journal of Mechanical Engineering and Applications Pub Date : 2020-04-29 DOI: 10.11648/J.IJMEA.20200802.11

Ahmad Waguih Elescandarany

{"title":"Externally Pressurized Thrust Spherical Bearing Performance Under Variable Lubricant Viscosity (Un-recessed Clearance Type)","authors":"Ahmad Waguih Elescandarany","doi":"10.11648/J.IJMEA.20200802.11","DOIUrl":"https://doi.org/10.11648/J.IJMEA.20200802.11","url":null,"abstract":"In a previous study handling this subject, a series of six papers has been published covering the fitted type (equal radii of this sort of bearings) with its configurations in details. The present study handles the same subject investigating the clearance type of this sort of bearings starting with the un-recessed one. The clearance type of bearings, where the sphere radius is smaller than that of the seat, provides plenty of complications and great divergence in its behavior compared with the fitted one. The study investigates theoretically the bearing behavior under the lubricant viscosity variation in the presence of the centripetal inertia due to the shaft rotation and the surface roughness. Solutions have been derived for the un-recessed clearance type of bearings with hemispherical and partial hemispherical seats in addition to its two special cases using capillary tube and orifice restrictors. Unlike other studies, using the conventional integration (i.e., without using the Sommerfeld substitution), only one equation with one form for the pressure gradient is derived to cover the positive and negative eccentricity ratios. Expressions for the pressure distribution, temperature distribution in turn the temperature rise, load carrying capacity; volume flow rate, frictional torque, friction factor, power losses and stiffness factor are obtained. The study shows the combined effects of the viscosity variation, the centripetal inertia and the surface roughness on the bearing performance. The optimum design (with constant viscosity) based on the minimum power losses, minimum flow rate and the optimal restrictor dimensions, in a previous study is checked where it is found out that designing this type of bearings on such basis only is not sufficient in despite of the bearing consistency. A natural dynamic phenomenon ignored in the previous study is revealed and briefly touched.","PeriodicalId":398842,"journal":{"name":"International Journal of Mechanical Engineering and Applications","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132575873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Research Based on Lee Algorithm and Genetic Algorithm of the Automatic External Pipe Routing of the Aircraft Engine 基于李算法和遗传算法的飞机发动机外管自动布线研究

International Journal of Mechanical Engineering and Applications Pub Date : 2020-02-20 DOI: 10.11648/J.IJMEA.20200801.16

Qian Zhou, Yanjie Lv

{"title":"Research Based on Lee Algorithm and Genetic Algorithm of the Automatic External Pipe Routing of the Aircraft Engine","authors":"Qian Zhou, Yanjie Lv","doi":"10.11648/J.IJMEA.20200801.16","DOIUrl":"https://doi.org/10.11648/J.IJMEA.20200801.16","url":null,"abstract":"The casing of aeroengine has the characteristics of rotating surface, and more than one hundred pipes are decorated between the casing and outer surface of the nacelle. For the narrow space and various constraints of pipe routing, manual pipe routing is not only labor intensive, but also difficult to ensure the accuracy. To resolve the problem of automatic pipe routing of the aircraft engine, a novel method based on lee algorithm and genetic algorithm is proposed. Firstly, a 3D environment of pipe routing is built and then the initial population for the genetic algorithm is formed by lee algorithm combined with roulette method. Each chromosome of the population represents a possible solution of pipe routing. Secondly, a variable length coding scheme based on chain table is used for chromosome encoding. The genetic manipulation includes selection, crossover and mutation. This paper presents the fitness function based on the constraint condition of pipeline routing. Finally, the useful and feasibility of this method is developed and verified by developing an automatic pipe routing module based on UG and VC.","PeriodicalId":398842,"journal":{"name":"International Journal of Mechanical Engineering and Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134428550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

An Intelligent Regenerative Braking Strategy for Power-split Hybrid Electric Vehicle 动力分流混合动力汽车智能再生制动策略研究

International Journal of Mechanical Engineering and Applications Pub Date : 2020-02-13 DOI: 10.11648/J.IJMEA.20200801.14

Q. Huỳnh, L. V. Dat., Khanh-Tan Le

{"title":"An Intelligent Regenerative Braking Strategy for Power-split Hybrid Electric Vehicle","authors":"Q. Huỳnh, L. V. Dat., Khanh-Tan Le","doi":"10.11648/J.IJMEA.20200801.14","DOIUrl":"https://doi.org/10.11648/J.IJMEA.20200801.14","url":null,"abstract":"Nowadays, hybrid electric vehicle (HEV) is a popularly vehicle due to its advances such as reducing fossil fuel consumption and emissions that affect on environment. Brake energy regeneration system is essential part in HEV and electric vehicle. It assists HEV in reducing fuel consumption and pollution emission. Regenerative braking system aims to discard heat energy from mechanical braking as vehicle decelerated. Therefore, design and develop a suitable regenerative braking system were always intended. The braking control strategies were variation and improvement. The mechanical – electric braking system was utilized. This braking system must achieve the criteria such as safety, stability, maximum energy recovery and the shortest the braking distance. This paper proposed a control strategy for this hybrid braking system. Firstly, braking performances were satisfied by braking torque distribution strategy between front and rear axles. Secondly, maximum energy recovery was computed by compromising between mechanical and electric braking torque. Two issues were implemented by applying fuzzy logic and rule-based to design the braking torque controllers. Two controllers were estimated through the results of simulation in power-split HEV. The controller, applied fuzzy-based, had significant improvements in fuel consumption compare with another one. In addition, this controller was more flexible in various driving conditions.","PeriodicalId":398842,"journal":{"name":"International Journal of Mechanical Engineering and Applications","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122719135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Intermodal Transport as the Main Driver for Improving Logistics Costs - A Study of Viet Nam - Based Logistics Service Users 多式联运是提高物流成本的主要驱动力——对越南物流服务用户的研究

International Journal of Mechanical Engineering and Applications Pub Date : 2020-02-04 DOI: 10.11648/J.IJMEA.20200801.15

Ho Thi Thu Hoa, Le Van Thanh, Chu Thi Hue, Mai Van Thanh, Bui Van Hung

{"title":"Intermodal Transport as the Main Driver for Improving Logistics Costs - A Study of Viet Nam - Based Logistics Service Users","authors":"Ho Thi Thu Hoa, Le Van Thanh, Chu Thi Hue, Mai Van Thanh, Bui Van Hung","doi":"10.11648/J.IJMEA.20200801.15","DOIUrl":"https://doi.org/10.11648/J.IJMEA.20200801.15","url":null,"abstract":"Intermodality has become a major component of the systems approach to business, which is an integral part of what is commonly called “logistics management”. Another benefit of intermodality has been the cooperation between government and private enterprise in reducing unnecessary documentation, enabling goods in transit to keep pace with demand, enabling an efficient and cost-effective use of the transport system through unbroken chain and customer oriented door-to-door services. The economic basis for intermodal transport is to display favourable economic and operational characteristics individually, can be integrated in a door-to-door transport chain in order to improve the overall efficiency of the transport system. Intermodal transportation is a response to changes of international trade requirements for moving all types of cargo. Logistics costs are among important factors affecting the competitiveness of both companies and nations in the world. Companies can increase their competitiveness by reducing their logistics costs in which the transport costs share the highest propotion, as a result, the total costs of products and services can be reduced. The aim of this article is to evaluate the importance role of intermodal transport as the main factor which will contribute to improve logistics costs in Viet Nam by integrating modes of transport in unbroken chain with the seamless process. Research results are collected from surveys and interviews logistics service providers in Ho Chi Minh City, Vietnam, processed by SPSS software.","PeriodicalId":398842,"journal":{"name":"International Journal of Mechanical Engineering and Applications","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132383244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Fault Detection Approach Using Variational Mode Decomposition, L-kurtosis and Random Decrement Technique for Rotating Machinery 基于变分模态分解、l -峰度和随机减量技术的旋转机械故障检测方法

International Journal of Mechanical Engineering and Applications Pub Date : 2020-02-01 DOI: 10.11648/J.IJMEA.20200801.13

Hui Liu, Zhiyu Shi

{"title":"A Fault Detection Approach Using Variational Mode Decomposition, L-kurtosis and Random Decrement Technique for Rotating Machinery","authors":"Hui Liu, Zhiyu Shi","doi":"10.11648/J.IJMEA.20200801.13","DOIUrl":"https://doi.org/10.11648/J.IJMEA.20200801.13","url":null,"abstract":"Fault detection of rotating machinery under heavy noise background, is a significant but difficult issue, and traditional fault detection approaches are difficult to apply. To address this problem, a novel approach that combines variational mode decomposition (VMD), L-Kurtosis and random decrement technique (RDT) is proposed, which procedures are summarized as follows. First, the raw vibration signal collected from the rotating component is decomposed using VMD into a set of intrinsic mode functions (IMFs), and the noise components can be separated from the raw signal. Second, the L-Kurtosis indicator is introduced to solve the problem that the fault information is difficult to track, and the optimal intrinsic mode function (IMF) can be determined according to the maximum L-Kurtosis value. Then, RDT is further employed to purify the optimal IMF to eliminate the other unknown interference sources. Finally, a Hilbert envelope spectrum analysis is used for detecting the fault type. In order to validate the proposed approach, the numerical simulations and real experimental investigations about rolling element bearing and gear are conducted. The results illustrate that the proposed approach can effectively detect faults of rotating components.","PeriodicalId":398842,"journal":{"name":"International Journal of Mechanical Engineering and Applications","volume":"345 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122279959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterization of Single Enset Fiber Tensile Properties Using Optimal Experimental Design and Digital Image Correlation Technique 利用优化实验设计和数字图像相关技术表征单Enset纤维的拉伸性能

International Journal of Mechanical Engineering and Applications Pub Date : 2020-01-09 DOI: 10.11648/J.IJMEA.20200801.12

A. Abdela, M. Versteyhe, Fasil Taddese

{"title":"Characterization of Single Enset Fiber Tensile Properties Using Optimal Experimental Design and Digital Image Correlation Technique","authors":"A. Abdela, M. Versteyhe, Fasil Taddese","doi":"10.11648/J.IJMEA.20200801.12","DOIUrl":"https://doi.org/10.11648/J.IJMEA.20200801.12","url":null,"abstract":"With the majority of the world’s fiber use relying on wood, cotton and petrochemicals, the use of alternative fiber sources in manufacturing is rapidly gaining importance in reaching the Sustainable Development Goal’s on innovation and responsible production. Lucidly, Enset is a main staple crop in southern and central Ethiopia where the pulp is fermented for food production but its strong fibers are now only used for local rope making or they are discarded. Hence, importance of processing this agricultural product for industrial application is explicit and characterization is, thus, mandatory. This paper presents the characteristics of a single Enset fiber in tension using Optimal Experiment Design and Digital Image Correlation techniques. To do so, Enset fiber sample with 10cm length glued to sand paper case with TIPIX application and speckle formation is prepared. Fiber density is measured by a Pycnometer to estimate a cross sectional area. Then, a known amount of load has been gradually applied until failure. And, images are taken while the extension is taking place using the limes camera. The retort of every point is used with analogue data to make a correlation using correlated solution software (Vic2D), and related scrutiny to determine fiber properties. Bundle test has also been used to reinforce the result. This work reports the properties of the fiber to be: Density: 1.4 g/cm3; Strength: 67Mpa-923Mpa, Mean strength: 647MP; E modulus: 12Gpa-69Gpa, Mean E modulus: 46MPa. Here, the major reason behind the smallest value in the range is the manual fiber extraction utilized in light of extracting the pulp.","PeriodicalId":398842,"journal":{"name":"International Journal of Mechanical Engineering and Applications","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122780153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

A Mobile Device Controlled Colonoscope 一种移动设备控制的结肠镜

International Journal of Mechanical Engineering and Applications Pub Date : 2020-01-08 DOI: 10.11648/J.IJMEA.20200801.11

C. Sheerer, Junghun Choi

{"title":"A Mobile Device Controlled Colonoscope","authors":"C. Sheerer, Junghun Choi","doi":"10.11648/J.IJMEA.20200801.11","DOIUrl":"https://doi.org/10.11648/J.IJMEA.20200801.11","url":null,"abstract":"The background: Colorectal cancer is a prevalent and deadly disease that is further emerging within our society. As knowledge about this disease becomes more widespread, increasing demand for screening and high standards arises. This creates a need for a device which can be more easily mastered by physicians to achieve competency, as well as reduce injury risks from performing repetitive motions during a heavy load of colonoscopy procedures. Method: This research focuses on the fabrication of a prototype colonoscope that incorporates a holding structure to support the colonoscope and a hand-held device that actuates distal tip steering. Experimentation was performed to compare a learning curve of the prototype scope to a conventional scope. Results: Results show that subjects using the prototype scope did not experience any significant reduction in force in either the thumb or forearm. Cecal intubation time and learning rate showed no significant decrease while using the prototype scope compared to a conventional scope. Concluison: The prototype of the automated scope did not reduce learning rate or offset intubation time, it also did not increase the learning rate or, for the most part, increase intubation time compared to a conventional scope.","PeriodicalId":398842,"journal":{"name":"International Journal of Mechanical Engineering and Applications","volume":"185 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131629423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0