现代机械工程(英文)最新文献_第3页

Design and Strength Verification of LNG Cargo Enclosure System FSP Type FSP型LNG货物围护系统的设计与强度验证

现代机械工程(英文) Pub Date : 2019-05-08 DOI: 10.4236/MME.2019.92005

Zeng Ji, Yuan Bo, F. Qi, Chen Yan

引用次数: 0

Study on Aerodynamic Characteristics of Supersonic Airfoil 超声速翼型气动特性研究

现代机械工程(英文) Pub Date : 2019-02-01 DOI: 10.4236/MME.2019.91002

Wen-Liang Yong

引用次数: 2

Koopman Reduced Order Control for Three Body Problem 三体问题的Koopman降阶控制

现代机械工程(英文) Pub Date : 2019-02-01 DOI: 10.4236/mme.2019.91003

H. Tang

引用次数: 3

Data-Driven Nonlinear Control for Orbit Transfer: From the Earth to Moon and L4/5 轨道转移的数据驱动非线性控制：从地球到月球和L4/5

现代机械工程(英文) Pub Date : 2019-01-17 DOI: 10.4236/MME.2019.91001

Xianyang Chen

引用次数: 0

Feasibility Study to Install Wind Farm in Bab Al-Hawa, Irbid, Northwest of Jordan 在约旦西北部伊尔比德的Bab Al-Hawa安装风电场的可行性研究

现代机械工程(英文) Pub Date : 2019-01-16 DOI: 10.4236/MME.2019.91004

Mohammad H. Al-Smairan, Omar Al-Nhoud

{"title":"Feasibility Study to Install Wind Farm in Bab Al-Hawa, Irbid, Northwest of Jordan","authors":"Mohammad H. Al-Smairan, Omar Al-Nhoud","doi":"10.4236/MME.2019.91004","DOIUrl":"https://doi.org/10.4236/MME.2019.91004","url":null,"abstract":"The utilization of wind energy for power generation purposes is becoming increasingly attractive and gaining a great share in the electrical power production market worldwide. This research was considered a feasibility study of wind energy farm in Bab Al-Hawa, Irbid. The average wind speed in the site is (6.5 m/s). Data have been collected, which includes the average monthly wind speed for 10 years, but by HOMER software to create the hourly wind speed of a representative year is created in order to build Weibull distribution and to calculate the energy generated output of the project. This project contains the construction of 33 wind turbines in 3.11 km square. Each turbine has a capacity of 900 kW rated power and the total rated capacity is 29.7 MW. The capacity factor was found equal to 37.1% which means the amount of utilization of the turbine capacity. The results show that the turbines work 87,286 h/yr, and the total energy generated is 96.548559 GWh/yr. from the 33 wind turbines installed. The initial cost of this project is equal to 80.5243 M$ and the Payback period is 7 years. We have taken into account the environmental impact such as CO2 emissions into consideration. CO2 reductions by using wind energy instead of coal-fired plant are equal to 67124.4 tons, and the CO2 emissions reduction using wind power instead of fuel oil power plant is 5343.4 tons. This research shows that wind farm at Bab Al-Hawa with a capacity of 29.7 MW, 33 wind turbines, 900 kW each has been feasible with a cost of energy 4 cents/kWh.","PeriodicalId":69007,"journal":{"name":"现代机械工程(英文)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45545847","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

Design and Optimization of Wing Structure for a Fixed-Wing Unmanned Aerial Vehicle (UAV) 固定翼无人机机翼结构的设计与优化

现代机械工程(英文) Pub Date : 2018-11-21 DOI: 10.4236/MME.2018.84017

Jiawen Yu

引用次数: 9

Pure Condition of Both 6R Serial and 3-PRS Parallel Robots Using Grassmann-Cayley Algebra 基于Grassmann-Cayley代数的6R串联和3-PRS并联机器人的纯条件

现代机械工程(英文) Pub Date : 2018-11-09 DOI: 10.4236/MME.2018.84016

Luc Djimon Clément Akonde, A. Adomou, T. Guidi

{"title":"Pure Condition of Both 6R Serial and 3-PRS Parallel Robots Using Grassmann-Cayley Algebra","authors":"Luc Djimon Clément Akonde, A. Adomou, T. Guidi","doi":"10.4236/MME.2018.84016","DOIUrl":"https://doi.org/10.4236/MME.2018.84016","url":null,"abstract":"This research presents Pure Condition approach, which has used in analyzing simultaneously the singularity configuration and the rigidity of mechanism. The study cases analysis is implemented on variable joints orientation of 6R (Revolute) Serial Manipulators (SMs) and variable actuated joints position of 3-PRS (Prismatic-Revolute-Spherical) Parallel Manipulators (PMs) using Grassmann-Cayley Algebra (GCA). In this work we require in Projective Space both Twist System (TS) and Global Wrench System (GWS) respectively for serial and parallel manipulators which represent the Jacobian Matrix (J) in symbolic approach to Plucker coordinate vector of lines and unify framework on static and kinematics respectively. This paper, works, is designed to determine geometrically at symbolic level the vanished points of inverse form of this Jacobian Matrix (J) which called superbracket in GCA. The investigation vary to those reported early by introducing GCA approach on the singularity of serial robot, variable joints orientation and actuated positions on robot manipulators (RMs) to analyze rigidity frame work and singularity configuration which involve simultaneously Pure Condition. And the results also revealed a single singularity condition which contains all particulars cases and three general cases such as the shoulder, elbow and wrist singularity for SMs while double, single and undermined singularities respectively for 3-PRS, 3-PRS and 3-PRS PMs which contain all generals and particulars cases.","PeriodicalId":69007,"journal":{"name":"现代机械工程(英文)","volume":"08 1","pages":"233-248"},"PeriodicalIF":0.0,"publicationDate":"2018-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42944346","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

Effects of the Reynolds and Weissenberg’s Numbers on the Stability of Linear Pipe Flow of Viscous Fluid 雷诺数和Weissenberg数对粘性流体线性管流稳定性的影响

现代机械工程(英文) Pub Date : 2018-10-18 DOI: 10.4236/MME.2018.84018

Ibrahim Kama, M. Sow, K. Kpode, C. Mbow

引用次数: 0

Creep-Fatigue Interaction Life Consumption of Industrial Gas Turbine Blades 工业燃气轮机叶片蠕变-疲劳相互作用寿命消耗

现代机械工程(英文) Pub Date : 2018-10-18 DOI: 10.4236/mme.2018.84015

E. G. Saturday, T. Isaiah

{"title":"Creep-Fatigue Interaction Life Consumption of Industrial Gas Turbine Blades","authors":"E. G. Saturday, T. Isaiah","doi":"10.4236/mme.2018.84015","DOIUrl":"https://doi.org/10.4236/mme.2018.84015","url":null,"abstract":"This paper presents the creep-fatigue interaction life consumption of industrial gas turbine blades using the LM2500+ engine operated at Pulrose Power station, Isle of Mann as a case study. The linear damage summation approach where creep damage and fatigue damage are combined was used for the creep-fatigue interaction life consumption of the target blades. The creep damage was modelled with the Larson-Miller parameter method while fatigue damage was assessed with the modified universal slopes method and the damage due to creep-fatigue interaction was obtained from the respective life fractions. Because of the difficulty in predicting the life of engine components accurately, relative life consumption analysis was carried out in the work using the concept of creep-fatigue interaction factor which is the ratio of the creep-fatigue interaction life obtained from any condition of engine operation to a reference creep-fatigue interaction life. The developed creep-fatigue interaction life consumption analysis procedure was applied to 8 most of real engine operation. It was observed that the contribution of creep to creep-fatigue interaction life consumption is greater than that of fatigue at all ambient temperatures. The fatigue contribution is greater at lower ambient temperatures as against higher ambient temperatures. For the case study, the overall equivalent creep-fatigue factor obtained was 1.5 which indicates safe engine operation compared to the reference condition. The developed life analysis algorithm could be applied to other engines and could serve as useful tool in engine life monitoring by engine operators.","PeriodicalId":69007,"journal":{"name":"现代机械工程(英文)","volume":"08 1","pages":"221-232"},"PeriodicalIF":0.0,"publicationDate":"2018-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70497324","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

Experimentation on Tool Wear and Surface Roughness in AISI D2 Steel Turning with WC Insert AISI D2钢WC镶片车削刀具磨损及表面粗糙度试验

现代机械工程(英文) Pub Date : 2018-08-29 DOI: 10.4236/MME.2018.83014

N. López-Luiz, O. J. Alemán, F. A. Hernández, M. Dávila, V. Baltazar-Hernández

{"title":"Experimentation on Tool Wear and Surface Roughness in AISI D2 Steel Turning with WC Insert","authors":"N. López-Luiz, O. J. Alemán, F. A. Hernández, M. Dávila, V. Baltazar-Hernández","doi":"10.4236/MME.2018.83014","DOIUrl":"https://doi.org/10.4236/MME.2018.83014","url":null,"abstract":"The Taguchi method, based on an orthogonal arrangement (L9, 33), the vari-ance analysis, the signal-to-noise ratios and the response surface methodol-ogy have been used to optimize maximum flank wear (VBmax) and surface roughness (Ra) of the cutting tool when turning a hardened steel AISI D2 (65 HRC) with PVD—TiAlN coated WC insert upon dry environment. By em-ploying regression models; cutting speed, cutting depth and feed rate, which optimize maximum flank wear and surface roughness were validated. Results of relation signal-to-noise ratios, showed that with cutting speed of 200 m/min, cutting depth of 0.2 mm and feed rate of 0.20 mm/rev, Ra is opti-mized. With cutting speed of 150 m/min, cutting depth of 0.4 mm and feed rate of 0.3 mm/rev, VBmax is optimized. Through the variance analysis it was concluded that the depth of cut was the main parameter that affected on the surface roughness; whereas, the feed rate was the most influential parameter on the flank wear. Confirmation test results showed that the Taguchi method was very successful in the optimization of machining parameters for mini-mum surface roughness and flank wear in the turning of the D2 steel.","PeriodicalId":69007,"journal":{"name":"现代机械工程(英文)","volume":"08 1","pages":"204-220"},"PeriodicalIF":0.0,"publicationDate":"2018-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44821784","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: 10