Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)最新文献_第2页

Comparative Study of Bisection, Newton, Horner’s Method for Solving Nonlinear Equation 对分法、牛顿法、霍纳法求解非线性方程的比较研究

Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) Pub Date : 2021-07-30 DOI: 10.36842/jomase.v65i2.238

A. Ab Aziz, Nur Afriza Baki, Abdul Zaki Zamri Azuha, Mohamad Aliff Haziq

引用次数: 0

Interlayer Effect on Connection of Mild Steel ST37 and Stainless Steel 201 on Rotary Friction Welding 旋转摩擦焊中低碳钢ST37与不锈钢201连接的层间效应

Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) Pub Date : 2021-03-29 DOI: 10.36842/jomase.v65i1.233

Yohanes Yohanes, Muhammad Heriansyah

{"title":"Interlayer Effect on Connection of Mild Steel ST37 and Stainless Steel 201 on Rotary Friction Welding","authors":"Yohanes Yohanes, Muhammad Heriansyah","doi":"10.36842/jomase.v65i1.233","DOIUrl":"https://doi.org/10.36842/jomase.v65i1.233","url":null,"abstract":"Friction welding is a type of solid state welding where the welding process is carried out in a solid phase to combine various types of ferrous and non-ferrous metals that cannot be welded by the fusion welding method but for welding different metals the welding results are less than optimal due to cracks on the surface of the welding results and differences in mechanical properties that cause the welding result to be brittle, therefore an interlayer is used. In this study, observations were made on the process and results of the joint friction welding using dissimilar metal material between mild steel ST37 and stainless steel 201 with copper interlayer. The results of the test will be a tensile test to see the maximum tensile strength and a hardness test to see the hardness value of the interlayer variation of 0.3 mm, 0.5 mm, 1 mm and without an interlayer. The conclusions obtained are: (1) The effect of the addition of an interlayer on the rotary friction welding process includes the friction phase, the forging phase and the results of welding parameters in the form of motor power, motor angular speed, the change in specimen length is greater without using an interlayer compared to using an interlayer while the duration of welding time is greater using an interlayer than without using an interlayer. (2) The maximum tensile test results were obtained at the 1 mm interlayer at 482.43 MPa and the maximum hardness test results obtained at the 1 mm interlayer were 321.34 VHN.","PeriodicalId":232042,"journal":{"name":"Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131280943","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

Production Process of Front Lights on Anoa 2 6x6 Special Vehicles at PT. Pindad (Persero) PT. Pindad (Persero)公司Anoa 2 6x6特种车前灯生产工艺

Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) Pub Date : 2021-03-29 DOI: 10.36842/jomase.v65i3.211

Nandha Syamza, A. Junaidi, Tri Subagyo

引用次数: 1

Correlation Analysis of Quality, Ability and Performance of Information Technology Usage on Registration Section of RSI Siti Rahmah Padang, Indonesia RSI注册部门信息技术使用质量、能力和绩效的相关分析

Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) Pub Date : 2020-11-30 DOI: 10.36842/JOMASE.V64I3.223

Yanti Desnita Tasri

{"title":"Correlation Analysis of Quality, Ability and Performance of Information Technology Usage on Registration Section of RSI Siti Rahmah Padang, Indonesia","authors":"Yanti Desnita Tasri","doi":"10.36842/JOMASE.V64I3.223","DOIUrl":"https://doi.org/10.36842/JOMASE.V64I3.223","url":null,"abstract":"Patient care in the registration section of the hospital is a very important activity, because there is a recording of patient data that will be used by other health workers in providing further health care. The use of information technology in the registration section can increase work effectiveness and efficiency and produce accurate information. For this reason, it is necessary to analyze the factors that affect the benefits of using information technology in the registration section. This study aims to examine the relationship between the quality of information systems, the ability of officers and the performance of information users at RSI Siti Rahmah Padang, Indonesia. The research was conducted with survey method and data analysis using a quantitative approach. From the research results, it was found that the quality of information systems did not affect the benefits of using information technology. Meanwhile, the ability and performance of officers affect the benefits of using information technology. It is suggested that the scope of the use of information technology in the medical records section be increased. It is necessary to increase the ability of officers in the use of information technology by holding training or workshops.","PeriodicalId":232042,"journal":{"name":"Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)","volume":"2015 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127735065","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

Pneumatic Breakwaters and Their Use for Ships protection in Coastal and Offshore Areas of Persian Gulf 气动防波堤及其在波斯湾沿海和近海地区船舶防护中的应用

Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) Pub Date : 2020-11-30 DOI: 10.36842/JOMASE.V64I3.219

Milad Bamdadinejad, M. Ketabdari, S. Rezaei

{"title":"Pneumatic Breakwaters and Their Use for Ships protection in Coastal and Offshore Areas of Persian Gulf","authors":"Milad Bamdadinejad, M. Ketabdari, S. Rezaei","doi":"10.36842/JOMASE.V64I3.219","DOIUrl":"https://doi.org/10.36842/JOMASE.V64I3.219","url":null,"abstract":"Pneumatic breakwater is a kind of wave energy damping structure which is capable of reducing a portion of wave energy. The structure utilizes an air bubble column deep in water to induce a counter flow which opposes the wave current resulting in damping of its energy and the height of the wave. Fast installation with the least space occupied along with posing no obstacle for shipping and maneuvering are advantages of this structures. Although the disadvantage of this method can be wasting of almost half the energy of outgoing air. Using this method, a range of waves with lower height can be achieved. To draw the most advantage out of this method, the pneumatic breakwater can be combined with Floating breakwater. In order to explore the effectiveness of Hybrid breakwater, a physical or numerical model in deeper water depth is required. Utilizing this method in coasts where other kind of ordinary breakwaters are not practical and temporarily in the vicinity of shore in deeper water is economically effective. This breakwater can be attached to the ship (DAHET) or rig (ATAB). Hybrid system creates a safe atmosphere for smooth transfer of the passengers of crew boats to and from wharf in a continuous manner even in rough sea and bad weather condition. Case study in Persian Gulf indicates that pneumatic breakwater is practical in Persian Gulf except for longitude between 51° and 57° and latitude between 24° and 28° Northern which extends from eastern north to 14 Kilometers of Parsian Coasts and 30 Kilometers of Lengeh Port and from western south to 6 Kilometers of Dubai coasts to Abuzabi and from eastern north to 12 km of Kargan port to Sirik and from western south to 130 Kilometers of eastern coasts of Qatar.","PeriodicalId":232042,"journal":{"name":"Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116517314","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

Tricopter Vehicle Frame Structure Design Integrated as Platform of Fixed Wing Atha Mapper 2150 作为固定翼测绘仪2150平台集成的三旋翼飞行器车架结构设计

Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) Pub Date : 2020-07-30 DOI: 10.36842/jomase.v64i2.218

K. Anuar, W. Fatra, M. Akbar

{"title":"Tricopter Vehicle Frame Structure Design Integrated as Platform of Fixed Wing Atha Mapper 2150","authors":"K. Anuar, W. Fatra, M. Akbar","doi":"10.36842/jomase.v64i2.218","DOIUrl":"https://doi.org/10.36842/jomase.v64i2.218","url":null,"abstract":"To upgrade aerial vehicle of Atha Mapper 2150 capable of vertical take-off and landing capability, it needs to be integrated to the tricopter vehicle. In this study the tricopter frame structure was designed based on the Atha Mapper 2150 fixed wing vehicle. This study began with a calculation process to determine the dimensions of the tricopter.. Next, the process of building four tricopter concept designs with variations of the shape of the frame and the cross section of the arm. The four concept designs are selected using a decision matrix. Based on the values in decision matrix table, the design concept I (Y configuration and rectangular arm cross section) was the best design, because it has the highest weighting value. The selected design was then simulated for its structural strength in Ansys software by giving a load of thrust to the three arms of the tricopter frame. In the middle of frame is given a boundary condition in the form of hinges. From the static simulation results of the tricopter frame structure, the maximum stress value was 54,126 MPa, which occurred on the M3 arm. The greatest total deformation also occurred in the M3 arm with a value of 10,335 mm. The safety factor value of tricopter frame structure was 8.77. This shows the tricopter frame structure with the main material in the form of carbon fiber, acrylic and PLA meets the required safety criteria.","PeriodicalId":232042,"journal":{"name":"Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133378964","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: 4

Potential Investigation of B3 Waste (Used Oil) of Motorcycle as Alternative Diesel Fuel 摩托车B3废油作为替代柴油的潜力研究

Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) Pub Date : 2020-07-30 DOI: 10.36842/jomase.v64i2.145

Yohanse Yohanes, Artina Rukmana

引用次数: 2

Failure Analysis of Hydraulic Cylinder Bolt on Turntable Vibrating Compactor in Aluminum Processing Plant 铝加工厂转台振动压实机液压缸螺栓失效分析

Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) Pub Date : 2020-07-30 DOI: 10.36842/jomase.v64i2.215

I. P. Sari, W. Fatra

{"title":"Failure Analysis of Hydraulic Cylinder Bolt on Turntable Vibrating Compactor in Aluminum Processing Plant","authors":"I. P. Sari, W. Fatra","doi":"10.36842/jomase.v64i2.215","DOIUrl":"https://doi.org/10.36842/jomase.v64i2.215","url":null,"abstract":"The aluminum and its alloy have several characteristics i.e. relatively low density, high electrical and thermal conductivity and also good in corrosion resitance. The molding process of green anode blocks at an aluminum plant is carried out by an anode forming system. In this system, there is a printer called as turntable vibrating compactor or referred to as a ‘shaking machine’. During 55 seconds of anode block compaction, the fluctuating stress would be received by hydraulic cylinder bolt due to vibrations of the turntable vibrating compactor. Fluctuating stress that works continuously on the bolt can increase the tendency of failure. This paper aims to find out the causing factors and alternative solution for failure of the hydraulic cylinder bolt. To determine the cause of failure, several methods are carried out, i.e. fractography investigation, metallography examination according to ASTM E3-95, hardness testing according to ASTM E92-17 and tensile testing according to ASTM E8/E8M-16a. Fractography investigation show the failure mode of low cycle fatigue due to the application of high nominal stress. This is indicated by the presence of ratchet, beach mark, river mark and shear lip. The short life of the bolt due to the hardness and strength of the bolt after undergoing the heat treatment process Q + T cannot increase its endurance limit.","PeriodicalId":232042,"journal":{"name":"Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)","volume":"182 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117107031","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

Effect of Cutting Depth and Feed Speed to Surface Roughness in Lathe Process of Screw Conveyor Shaft (Case Study: PT. RAPP) 螺旋输送机轴车床加工中切削深度和进给速度对表面粗糙度的影响(以PT. RAPP为例)

Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) Pub Date : 2020-07-30 DOI: 10.36842/jomase.v64i2.200

J. A. Khair, Deni Pranata, Ujang Nurhadek

{"title":"Effect of Cutting Depth and Feed Speed to Surface Roughness in Lathe Process of Screw Conveyor Shaft (Case Study: PT. RAPP)","authors":"J. A. Khair, Deni Pranata, Ujang Nurhadek","doi":"10.36842/jomase.v64i2.200","DOIUrl":"https://doi.org/10.36842/jomase.v64i2.200","url":null,"abstract":"The metalworking process is one of the most important things in manufacturing of machine components, such as lathe process. Therefore, it is required continuously innovation to improve production quality. There are several ways to do this, for example by choosing the right type of tool, depth of cut, and spindle speed. In turning process for the production of goods is very important to produce a precision product in accordance to desiring of size and roughness. The turning speed of a lathe has a type of spindle rotation rate that is used according to production requirements, which uses a rotational speed that can be changed the rate of rotation of the machine, in order to determine the level of surface roughness in the turning process. One is affected the optimal conditions of the turning speed and feeding rate. In this paper, the variations of different rotational speed levels of low speed, medium speed and high speed according to variations of feeding rate in order to know the difference in roughness results for the screw conveyor shaft operation. The roughness was measured on the surface turning process using a reference of surface roughness stand comparator (ISO2632 / I-1975). The result of test revealed the greater speed of feed rate, the greater value of roughness. Reversely, the smaller speed of feed rate affected the lower roughness value.","PeriodicalId":232042,"journal":{"name":"Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114086329","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

Application of Quality Control Circle Method in Crusher Knife Reconditioning Products (Case Study in PT. Andritz Pekanbaru) 质量控制圈法在破碎机修刀产品中的应用(以德国安德里茨公司为例)

Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) Pub Date : 2020-07-30 DOI: 10.36842/jomase.v64i2.148

Samuel Putra Tambunan, Anita Susilawati, Yohanes Yohanes

{"title":"Application of Quality Control Circle Method in Crusher Knife Reconditioning Products (Case Study in PT. Andritz Pekanbaru)","authors":"Samuel Putra Tambunan, Anita Susilawati, Yohanes Yohanes","doi":"10.36842/jomase.v64i2.148","DOIUrl":"https://doi.org/10.36842/jomase.v64i2.148","url":null,"abstract":"The purpose of this study is to identify, analyze and evaluate the influencing of defects factors at the crusher knife reconditioning process in PT Andritz Pekanbaru. In this research adopted the Quality Control Circle (QCC) method. The QCC method is a quality control that is focused on the process of Plan, Do, Check, Action (PDCA). The research was carried out with 8 stages of PDCA, namely determining the theme, determining the title, finding the source of the problem, solving the problem plan, implementing, evaluating, standardizing, and determining the next plan. After observing the crusher knife reconditioning process, there were 10 defects that occurred in the crusher knife reconditioning process, which were porosity of 673 cases, curling tip of 78 cases and 57 of fewer cases followed. The repairs were carried out using the QCC method. The results of improvements were proved by reducing of the percentage of total defect porosity from 13% to 2%. Therefore, the repairs were successfully implementation, which decreasing of the defect porosity of 11%.","PeriodicalId":232042,"journal":{"name":"Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124124949","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