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All Journal Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Jurnal Teknologi AKSIOLOGIYA : Jurnal Pengabdian Kepada Masyarakat Seminar Nasional Teknologi Informasi Komunikasi dan Industri Dinamisia: Jurnal Pengabdian Kepada Masyarakat Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Akbar, Musthafa
Universitas Riau
Aerospace Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mathematics Mechanical Engineering Social Sciences Other

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Rancang Bangun Alat Uji Balancing Universal Menggunakan Metode Vdi 2222 M. Ferdiman Setepu; Musthafa Akbar; Feblil Huda
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The machines with rotating shaft on the highest level of rotation which is until 3000 rpm like turbine will be dangerous if there’s an unbalance occur while working out. The low unbalance mass with high rotation shall also cause so high centrifugal force that the bearing would be broken easily. It severely damages all systems. Universal balancing testing machine is one of the alternatives used to detect the machine damages with various dimensions. It also can detect some other broken components by measuring the vibration without any physical contact to the machines. The universal balancing testing machine design uses VDI 2222 method by deciding product concept from various ones which are created then developed into a product. From this design, it gives a static analysis result from analytic and finite element methods. The results are the shaft diameter sized 15.12 mm, and the value of stress analysis for base bearing for maximum voltage is 6.6 MPa. It could be classified into the safe one as the voltage is smaller than material license which is in the amount of 180 MPa with safety factor in 27.Keywords: unbalance, VDI 2222, Analytic method, Finite Element Method
Tricopter Vehicle Frame Structure Design Integrated as Platform of Fixed Wing Atha Mapper 2150 Kaspul Anuar; Warman Fatra; Musthafa Akbar
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 64 No 2 (2020): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (412.545 KB) | DOI: 10.36842/jomase.v64i2.218

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.
Analisis Kapasitas Penyerapan Energi Crash Box dengan Variasi Geometri Penampang dan Jumlah Silinder Menggunakan Metode Elemen Hingga Musthafa Akbar
Seminar Nasional Teknologi Informasi Komunikasi dan Industri 2020: SNTIKI 12
Publisher : UIN Sultan Syarif Kasim Riau

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Abstract

Penerapan desain kendaraan dengan memperhatikan aspek crashworthiness merupakan hal yang harus dilakukan untuk menjamin faktor keamanan pengguna. Salah satu komponen yang berfungsi sebagai penyerap energi impak di kendaraan adalah crash box. Penelitian ini bertujuan untuk mengetahui konstruksi geometri penampang crash box yang paling optimal dalam menyerap energi impak tabrakan kendaraan. Analisis dilakukan dengan menggunakan metode elemen hingga explicit dynamic yang divalidasi dengan data eksperimen. Model yang dianalsis berupa single-walled, double-walled, dan triple-walled thin cylinder untuk setiap penampang berbentuk circular, square, dan rectangle. Berdasarkan hasil simulasi elemen hingga, ditemukan bahwa crash box dengan penampang circular memiliki kapasitas penyerapan energy impak yang paling besar. Hasil analisis disimpulkan bahwa secara umum terjadi peningkatan kapasitas penyerapan energi dengan penambahan jumlah dinding cylinder. Akan tetapi, ditemukan munculnya fenomena euler-buckling pada penampang square dan rectangle sehingga tidak layak diaplikasikan sebagai struktur crash box.
PEMBUATAN PETA CITRA MELALUI PENGINDERAAN JAUH MENGGUNAKAN PESAWAT TERBANG TANPA AWAK (PTTA) DI DESA PETAI BARU, KECAMATAN SINGINGI, KABUPATEN KUANTAN SINGINGI, PROVINSI RIAU Musthafa Akbar; Kaspul Anuar; Romi; Herisiswanto; Yohanes
Dinamisia : Jurnal Pengabdian Kepada Masyarakat Vol. 3 No. 1 (2019): Dinamisia: Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Lancang Kuning

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31849/dinamisia.v3i1.2063

Abstract

Peta citra resolusi tinggi dari suatu area dapat digunakan sebagai dasar dalam merencanakan tata ruang. Selain itu, peta citra resolusi tinggi juga dapat digunakan untuk menginventarisasi penggunaan lahan disuatu area. Salah satu metode pembuatan peta citra resolusi tinggi adalah melalui penginderaan jauh menggunakan Pesawat Terbang Tanpa Awak (PTTA). Keunggulan pembuatan peta citra melalui penginderaan jauh menggunakan Pesawat Terbang Tanpa Awak (PTTA) adalah gambar/citra yang dihasilkan sangat detail (resolusi sebesar 5cm). Jika dibandingkan dengan gambar/citra yang dihasilkan satelit, resolusi maksimumnya hanya sebesar 50 cm. Selain itu, pengambilan citra udara menggunakan PTTA tidak terkendala kondisi awan, karena pengoperasiaan PTTA dilakukan pada ketinggian di bawah awan. Desa Petai Baru merupakan salah satu desa yang berada di Kecamatan Singingi, Kabupaten Kuantan Singingi, Provinsi Riau. Desa ini memiliki luas wilayah sebesar 10,5 km2. Desa Petai Baru berada di area yang dikelilingi oleh hutan dan perkebunan kelapa sawit dengan jenis tanah kuning berpasir. Jarak dari Kota Pekanbaru ke Desa Petai Baru, Kecamatan Singingi lebih kurang 180 km. Pada tahun 2018, Tim dosen dari Jurusan Teknik Mesin Universitas Riau melaksanakan kegiatan pengabdian masyarakat di Desa Petai Baru dalam bentuk pembuatan peta citra resolusi tinggi melalui penginderaan jauh menggunakan Pesawat Terbang Tanpa Awak (PTTA). Dalam pelaksanaanya, kegiatan pengabdian masyarakat ini diawali dengan kegiatan survey ke lokasi yang bertujuan untuk menggali permasalahan terkait tata ruang dan ketersediaan peta citra di Desa Petai Baru. Selain itu, kegiatan suvey ini bertujuan untuk merencanakan jalur terbang yang akan dilewati oleh wahana pesawat terbang tanpa awak. Kegiatan utama berupa penginderaan jauh dilaksanakan sesuai dengan waktu yang disepakati dengan pihak desa yaitu pada tanggal 11 Agustus 2018. Proses penginderaan jauh menggunakan pesawat terbang tanpa awak ini dibantu oleh mahasiswa kukerta Universitas Riau dan perangkat desa setempat. Data foto udara yang didapat melalui pemotretan udara yaitu sebanyak 125 buah. Data foto udara ini kemudian diolah pada software mosaic agar didapat output berupa peta udara dengan citra resolusi tinggi. Peta udara ini kemudian dicetak pada banner dan diserahkan kepada kepala desa setempat dalam bentuk hard copy (cetak banner) dan softcopy (dalam format kml).
RANCANG BANGUN SISTEM PELONTAR TIPE CATAPULT UNTUK WAHANA TERBANG TIPE FIXEDWING ATHA MAPPER 2300 Kaspul Anuar; Imam Nugraha; Musthafa Akbar; Nazaruddin Nazaruddin; Warman Fatra
Jurnal Teknologi Vol 15, No 1 (2023): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.15.1.13-24

Abstract

Atha Mapper 2300 is a fixed wing aircraft, which is the next generation of Atha Mapper 2150. In order to finish its mission, the aircraft used to take off by hand launch method. Hand launch method utilize the throwing force of the launch operator to take off. The method has many issues, such as low safety degree, and inconsistent take off angle and speed. The purpose of this research are to design a launcher for Atha Mapper 2300 UAV, to determine the structural strength for Atha Mapper 2300 launcher system, to produce the designed launcher system, and to find out the performance of the produced launcher system. The design process was based on the Atha Mapper 2300 specification, which are 2300 mm of wingspan, MTOW: 6 Kg, and 10 m/s of stall speed. The result of the design was a launcher system with dimension of 3000 mm length, 1400 mm wide, 900 mm height, and 14o inclination angle. The launcher system was a catapult type launcher with 30 x 60 x 1.2 mm hollow stainless steel as its main material, and has a total mass of 11.162 Kg. The structural strength calculation resulted a criteria fulfillment of 113.4. The calculation also resulted a maximum launch speed of 11.658 m/s. Then, practically the produced launcher result a maximum launch speed of 12.116 m/s which is relatively close to the theoretical calculation. The speed fulfill the initial criteria which is ≥ 11.5 m/s. By these results, the launcher system was claimed to be successfully help Atha Mapper 2300 to have a stabilized take off.
Pengembangan Media Promosi dan Media Informasi Wisata di Kelurahan Batu Bersurat, Kabupaten Kampar, Riau Kaspul Anuar; Feblil Huda; Warman Fatra; Herisiswanto; Gun Faisal; Dedi Rosa Putra Cupu; Sonia Somadona; Musthafa Akbar; Awaludin Martin; Nazaruddin; Syafri
Aksiologiya: Jurnal Pengabdian Kepada Masyarakat Vol 7 No 4 (2023): November
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/aks.v7i4.10738

Abstract

Potensi objek wisata yang terdapat di Batu Bersurat belum tergarap dengan serius dan maksimal. Hal ini dapat dilihat dari minimnya sarana informasi dan promosi terkait keberadaan objek wisata di wilayah ini. Selain itu, minimnya keberadaan sarana pendukung turut menjadi penyebab rendahnya kunjungan wisatawan di wilayah ini. Berdasarkan pada permasalahan tersebut. Tim melaksanakan kegiatan pengabdian dalam bentuk pengembangan sarana dan penyediaan akses informasi wisata dalam rangka meningkatkan minat dan kunjungan wisatawan di Kelurahan Batu Bersurat, Kabupaten Kampar. Kegiatan pengabdian ini diawali dengan pembuatan foto udara dan foto landscape di area wisata Batu Bersurat dengan menggunakan wahana pesawat terbang tanpa awak tipe fixed wing. Selanjutnya kegiatan dilanjutkan dengan pembuatan video udara sinematik dengan memanfaatkan dua unit pesawat tanpa awak tipe rotary wing (drone). Hasil dari pembuatan media promosi wisata berbentuk video udara sinematik, foto landscape dan foto udara, selanjutnya diintegrasikan ke dalam media informasi wisata berbasis website yang juga dibuat oleh tim pengabdian. Diharapkan dengan adanya media promosi dan media informasi wisata ini, memudahkan pengelola objek wisata di Batu Bersurat, untuk mempromosikan ke khalayak ramai terkait keindahan objek wisata yang terdapat di Batu Bersurat.
Balancing Rotor Dinamik Menggunakan Sinyal Suara Ariadi Saputra; Feblil Huda; Musthafa Akbar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5, No 1 (2018): Wisuda April Tahun 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Rotating machines that have been operating within a certain period of time there is frequent vibration. The vibration is usually caused by unbalance, misalignment, bearing defect, and others. Unbalance is ranked as a first cause of vibration, which more than 80% cases of vibration caused by unbalance. This condition causes the balancing process needs to be done. A commonly method of vibration measurement uses vibration sensors such as accelerometer or vibrometer, that should be affixed to the machine in operation. This can cause discomfort and may even dangerous the operator when measuring the machines. The solution of the problem can be done using non contact measurement, where the sensor is not attached directly to the test equipment. Microphone is a device that can record the sound signal without necessarily contact the tested device. The unbalance tendency of the test is characterized by the presence of the dominant frequency at one rotational speed (1 x rpm). From the test, the result of balancing of normal condition on one rotor and two rotors are 0.039 V and 0.031 V with balancing efficiency 87.88% and 80.74% respectively. The addition of unbalance mass on one rotor and two rotors is obtained balancing result of 0.031 V and 5.88x10-3 V with efficiency balancing of 93.58% and 97.43% respectively.Keywords : voice signal, unbalance, balancing, microphone, unbalance mass
Failure Assessment Diagram Constraint Used for Integrity Analysis of Cylindrical Shell with Crack Akbar, Musthafa; Setiawan, Rachman
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 27 No 1 (2016): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v27i1.427

Abstract

During itsoperation time, cylindrical pressure vessel could experience cracks. If this happens, the question is raised whether the pressure vessel could still be used or not, moreoever whether further treatment is required. In process and petroleum industry, an integrity analysis using Fitness For Service methodology is common, for instance referring to API 579/ASME FFS-1 2007 Code. Level 3 assessment within the Code requires a finite element simulation in order to generate both the evaluation point and the Failure Assessment Diagram (FAD) that serves as an acceptance criteria. Here, a parametric study based on the methodology given by the Code has been carried out to generate such result for the cases of internal longitudinal crack defect in a cylindrical shells for a number of common cases, in terms of thickness-to-radius ratio, crack size ratio, and crack aspect ratio. The evaluation of Stress Intensity Factor is determined through J-integral parameter found using a finite element analysis with a specially-meshed strategy incorporating the crack. The result of the model is first verified with that of the Code for a number of cases, before being used for parametric study. The model yields a relatively close comparison with that of the Code. A number of regressed equation was derived for several cases, and proposed to be used in integrity assessment of cylindrical shell. A procedure of using the parametric study result from this investigation is also outlined here.
Integrity Assessment of Cracked Pressure Vessel with Considering Effect of Residual Stress Based on Failure Assessment Diagram Criteria Akbar, Musthafa; Setiawan, Rachman
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 28 No 1 (2016): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v28i1.422

Abstract

During the period of its operation, a pressure vessel may experience excessive loading which can cause crack defects. Integrity analysis needs to be carried out to evaluate the feasibility operation of that cylindrical pressure vessel with defects. In this paper, integrity assessment of cracked pressure vessel under internal pressure and tensile residual stress was conducted based on failure assessment diagram criteria. This criteria applied widely and adopted in API 579-1/ASME FFS-1 2007 Code. There are three assessment levels provided in code. Level 1 and 2 assessment performed using analytical calculation while Level 3 assessment is conducted using finite element method. On a case study, failure criteria for the integrity analysis is based on the Failure Assessment Diagram (FAD), that distinguish safe and unsafe region based on two failure criteria, namely brittle fracture and ductile fracture. This diagram is built using finite element method with the assumptions of both Linear Elastic Fracture Mechanics (LEFM) and Elastic Plastic Fracture Mechanics (EPFM). Based on Level 1 assessment, the pressure vessel under study is not recommended to be operated, whilst based on Level 2 and 3 assessments the pressure vessel is considered acceptable. This study concludes that Level 1 and 2 analysis provide more conservative results when compared with level 3 analysis. Failure Assessment Diagram for Level 3 analysis relatively more conservative at elastic-plastic region (0.4<Lr<1), but less conservative at plastic collapse region. Parametric studies performed with increasing operating pressure and size of defects. Based on analysis, failures of the pressure vessel occur at pressure of 403 psi and an aspect ratio of 0.18 for analysis with including the effect of tensile residual stresses. Meanwhile, if the analysis is done by ignoring the effect of residual stress, pressure vessel failed at pressure of 589 psi and leak when aspect ratio reaching 0.42.
Finite Element Analysis of Wood Structural Joints on Traditional Wooden Ship , Yohanes; Akbar, Musthafa; Aksa, Reysca Admi
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 30 No 1 (2016): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v30i1.416

Abstract

Traditional ship often made by woods materials and it was made without proper engineering procedure. This research focuses on a case study in BaganSiapiapi, Riau Province, Indonesia where a large wooden ship was manufactured. One of the sources of material failure in the manufacturing of wooden ship is located at the joint. In this research, a modification of joint design has been studied where 4 design model have been offered by using glue as the attachment materials and 5 other design by using bolt as the connection method. A finite element method was used to study the strength of the joint which has been guided by a standard issued by Indonesian Classification Bureau. There are 9 design of joints were modeled and studied which have been varied using two different wooden materials such as ‘keruing’ and ‘meranti’. A uniform loading was applied on all models and materials. The applied loadings are buoyancy force, gravity force, and pre-stress loading at the bolt. The result from simulation generates a stress-contour indicating the stress level on the materials. It was concluded that the model of connection hooked straight lip which is connected with 4 pieces M14 bolts with wood material keruing a recommended model for traditional wooden boat building. This design gives 1.605 mm deformation with maximum stress of 217.51 MPa.
Co-Authors , Yohanes Alfakhri Biranda Anuar, Kaspul April Yando ARI SETIAWAN Ariadi Saputra Asral, Asral Awaludin Martin Cupu, Dedi Rosa Putra Feblil Huda Gun Faisal Herisiswanto Herisiswanto Herisiswanto Herisiswanto Herisiswanto Herisiswanto Idznur Rizky Muhammad Imam Nugraha Juliandi Ashari M. Faisal M. Ferdiman Setepu N. Nazaruddin Nazaruddin Putrawani, Eky Rachman Setiawan Reysca Admi Aksa, Reysca Admi Romi Saputra, Ariadi Somadona, Sonia Sukma Aditya Syafri Syafri Syafri, Syafri Vicry Darmawan Wahyu Yustyanto Warman Fatra, Warman Yohanes