International Journal of Mechanical Engineering and Applications最新文献

The Outstanding Excellences of Interactive Energy Density Topology Change Method 交互式能量密度拓扑变化法的突出优势

International Journal of Mechanical Engineering and Applications Pub Date : 2024-04-02 DOI: 10.11648/j.ijmea.20241202.11

Yang Yang, Toshie Sasaki, Ayami Abe, Ichiro Hagiwara

{"title":"The Outstanding Excellences of Interactive Energy Density Topology Change Method","authors":"Yang Yang, Toshie Sasaki, Ayami Abe, Ichiro Hagiwara","doi":"10.11648/j.ijmea.20241202.11","DOIUrl":"https://doi.org/10.11648/j.ijmea.20241202.11","url":null,"abstract":"It has not been solved that the fruits, vegetables, strawberries, cells, blood and a bottle of liquor are damaged, broken during transportation. It is the greatest factor in this situation that there is a danger vibration frequency band where these are easy to scratch and are prone to death. If there are eigen frequencies within this danger frequency band, it needs that those eigen frequencies within this danger frequency band are moved out of the band. In the former paper, it was shown difficult to apply the existing topology optimization methods using homogenization method or density method to control plural eigen frequencies for solving this problem. Therefore in the former paper, it was proposed the so called “Interactive Energy Density Topology (IEDT) change method” that is a new high precision and high efficiency method for controlling plural eigen frequencies simultaneously referring to the kinetic and the strain energy density distributions. Here it is discussed more about the IEDT change method and show that it is sometimes difficult for the traditional methods to get solutions because especially in the dynamic problem, eigen frequencies may go up or down depending on its size even if reinforcement or hall for change topology is applied at the same location. But with the proposed IEDT change method, always it can be realized because the proposed method has wider solution spaces than the traditional one. Lastly, it is shown that this IEDT method is also very effective to reduce the integral value of response curve by frequency.","PeriodicalId":398842,"journal":{"name":"International Journal of Mechanical Engineering and Applications","volume":"322 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140754345","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

Research on the Improvement of Weldability in Resistance Spot Welding of 6-Series Aluminum Alloys 提高 6 系列铝合金电阻点焊焊接性的研究

International Journal of Mechanical Engineering and Applications Pub Date : 2023-11-30 DOI: 10.11648/j.ijmea.20231105.12

Lihui Zhong, Yuanbo Guo, Suhong Ji, Lijun Han

引用次数: 0

Processing and Characterization of Maraging Steel Using LPBF Additive Manufacturing Technology 利用LPBF增材制造技术加工马氏体时效钢及表征

International Journal of Mechanical Engineering and Applications Pub Date : 2023-08-22 DOI: 10.11648/j.ijmea.20231104.12

Ramesh Kumar Saride, Srinivas Vajjala, Aman Kumar, Rajesh Kumar, L. Pappula, Jagan Reddy Ginuga

{"title":"Processing and Characterization of Maraging Steel Using LPBF Additive Manufacturing Technology","authors":"Ramesh Kumar Saride, Srinivas Vajjala, Aman Kumar, Rajesh Kumar, L. Pappula, Jagan Reddy Ginuga","doi":"10.11648/j.ijmea.20231104.12","DOIUrl":"https://doi.org/10.11648/j.ijmea.20231104.12","url":null,"abstract":": Manufacturing processes saw significant change with the advent of Additive manufacturing (AM), which enables manufacture of complex shaped components, light-weight designs with reduced manufacturing lead times. Production of components in Maraging steel using Laser Powder Bed fusion Technology (LPBF) AM technique has gained importance in recent times, especially in defence & aerospace sectors. Current work entails processing and characterization of Maraging Steel fabricated through LPBF technology. Using full factorial DoE, primary process parameters were identified as Laser Power - 200W, Scan speed - 800mm/sec, Hatch width - 80µm. A process window comprising of laser power and scan speed was identified corresponding to the region with an energy density of ~100J/mm 3 . Microstructural characterization of as-deposited (AD), solution treated (ST) and ST+Aged (STA) specimens using optical and SEM microscopy revealed presence of defects like lack-of-fusion, soot and spatter. Additionally, specimens were printed with modified process parameters with zig-zig scanning pattern, resulted in reduction of defects. Furthermore, micro-hardness and tensile properties have been evaluated in AD, ST and STA conditions. The tensile strength of AD is higher compared to wrought material, whereas, STA showed equivalent strength. Also, it was inferred that printing in horizontal orientation is preferable to attain higher tensile properties.","PeriodicalId":398842,"journal":{"name":"International Journal of Mechanical Engineering and Applications","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122687936","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

Techno-Economic Analysis of the Usage of Solar Photovoltaic (SPV) System Compared to Premium Motor Spirit (PMS) for Power Generation in Nigeria 尼日利亚太阳能光伏(SPV)系统与优质汽油机(PMS)发电的技术经济分析

International Journal of Mechanical Engineering and Applications Pub Date : 2023-08-22 DOI: 10.11648/j.ijmea.20231104.13

Diwa James Enyia, Paul Chibundu Uzomah

引用次数: 0

The Effect of Bumper Dimensions and Car Speed on Neck and Lower Back Forces 保险杠尺寸和车速对颈部和下背力的影响

International Journal of Mechanical Engineering and Applications Pub Date : 2023-08-15 DOI: 10.11648/j.ijmea.20231104.11

Mithat Yanikoren, Muhammet Murat Hocaoglu, Bilal Usanmaz, Omer Gundogdu

{"title":"The Effect of Bumper Dimensions and Car Speed on Neck and Lower Back Forces","authors":"Mithat Yanikoren, Muhammet Murat Hocaoglu, Bilal Usanmaz, Omer Gundogdu","doi":"10.11648/j.ijmea.20231104.11","DOIUrl":"https://doi.org/10.11648/j.ijmea.20231104.11","url":null,"abstract":": Vehicle vibrations significantly affect the health and comfort of the driver and passengers. The aim of this study is to analyze the effects of vertical vehicle vibrations caused by speed bumpers on the driver's lower back and neck in terms of forces. To achieve this goal, a human biodynamic model with 11 degrees of freedom was included in a half vehicle model with 5 degrees of freedom. This composite human vehicle model was subjected to half-sinusoidal shaped bumps of different sizes (heights and widths) and with different vehicle speeds. The equations of motion of the system were solved using MATLAB (R2021a) to find the forces acting on the lower back and neck joint. In this article, besides commenting on the speed of the cars passing through the bumps, the effect of the bumps on the driver's lower back and neck was tried to be deduced in terms of forces. The results are presented visually and comparatively in graphs. At the end of the article, it was concluded that the mentioned speed bumps should be designed considering human comfort and health. In addition, in biomechanical studies examining human-vehicle-road interaction, it was emphasized that the parameter values of the human body should be determined more realistically.","PeriodicalId":398842,"journal":{"name":"International Journal of Mechanical Engineering and Applications","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127859667","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

Research on Reliability of Online Monitoring Results of Factory Discharge Pollutant SO₂ Based on Regression Analysis 基于回归分析的工厂排放污染物SO2在线监测结果可靠性研究

International Journal of Mechanical Engineering and Applications Pub Date : 2023-08-04 DOI: 10.11648/j.ijmea.20231103.12

Yang Shuo, Zhiqiang Pan, X. Niu, Geng Lei, Zhijing Sun, Dongchang Ma, Douwen Wang

引用次数: 0

Stable Equilibrium of a Mechanical Energy Storage Device 一种机械储能装置的稳定平衡

International Journal of Mechanical Engineering and Applications Pub Date : 2023-07-26 DOI: 10.11648/j.ijmea.20231103.11

S. Odi-owei, Kenny Ayoka

引用次数: 0

Reduce the Cooling FAN Blade Pass Frequency Noise in Electrical Vehicle 降低电动汽车冷却风扇叶片通道频率噪声

International Journal of Mechanical Engineering and Applications Pub Date : 2023-04-13 DOI: 10.11648/j.ijmea.20231102.13

Chuanxue Duan, Wei Qian

引用次数: 0

The Employability of Heavy Lift Class Ships for Logistics and Maintenance and Its Application in Military Means - Part I 重型起重级船舶后勤维修能力及其在军事上的应用——第一部分

International Journal of Mechanical Engineering and Applications Pub Date : 2023-03-31 DOI: 10.11648/j.ijmea.20231102.12

Bruno Assis De Lima

{"title":"The Employability of Heavy Lift Class Ships for Logistics and Maintenance and Its Application in Military Means - Part I","authors":"Bruno Assis De Lima","doi":"10.11648/j.ijmea.20231102.12","DOIUrl":"https://doi.org/10.11648/j.ijmea.20231102.12","url":null,"abstract":": The purpose of this article is to present a concept of the Heavy Lift Ship already used in the maritime market, aiming to propose viable alternatives for its employability, taking as its main focus the performance of the same in military operations, however the versatility of this class of ship, allows a wide range of activities. Currently, the theme of docking, maintenance, repair and logistics is in constant evidence due to the high level demanded by operational means of navies around the world, their maintenance is of essential importance for the preparation and use of Naval Power. The implementation of a ship of this class to a fleet or fleet allows its use to perform the function of a floating dock, for example, being able to carry out the transport of other ships or floating structures. Considering the incorporation of a medium with these characteristics, it allows the performance, in addition to services related to maintenance, repair and transport, the possibility of carrying out missions together with other bodies or companies such as Petrobras, for example, in addition to supporting existing military assets and that will still be incorporated. In general, the concept of using a ship with these characteristics can be put to good use, mainly evaluating the plurality that this means can provide to a Navy.","PeriodicalId":398842,"journal":{"name":"International Journal of Mechanical Engineering and Applications","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124686755","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

Development of a Cubic Core Lightweight Panel Using Origami-Kirigami Engineering 利用折纸- kirigami技术开发立方芯轻量化面板

International Journal of Mechanical Engineering and Applications Pub Date : 2023-03-21 DOI: 10.11648/j.ijmea.20231102.11

Zhilei Tian, Jingchao Guan, Wei Zhao, Apollo B. Fukuchi, Xilu Zhao, I. Hagiwara

引用次数: 0