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Nurir Rohmah
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Jurnal Techno Bahari
Published by Politeknik Negeri Madura
ISSN : 24068829     EISSN : 27468399     DOI : -
Core Subject : Science, Engineering,
Electrical & Electronics Engineering Energy Mechanical Engineering Transportation
Focus and Scope This journal encompasses original research articles, including: Technology Science Machinery Engineering Mechanical Engineering Shipbuilding Engineering Electrical Engineering (Electronics)
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 8 Documents
 1 
Search results for , issue "Vol 5 No 1 (2018)" : 8 Documents clear
Kekuatan Tegangan Kompresi Pada Konstruksi Kapal Pompong Berbahan Dasar Plastik High Density Polyethylene Jamal
Techno Bahari Vol 5 No 1 (2018)
Publisher : Politeknik Negeri Madura

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Abstract

The Pompong ship is traditional small boats that operates using a machine housed inside a ship's body or an inboard motor. The word term is known by the people around the waters of the Straits of Melaka especially in the waters of coastal Riau. The need for pompong ships around the coastal waters of Riau at this time is very much and is generally used for cargo boats, passenger boats and fishing boats. Nevertheless, the basic material of shipbuilding pompong at this time more difficult and more expensive so that need new breakthrough material of material substitution, in this research is used plastic material High Density Polyethylene (HDPE) as shipbuilding of Pompong. This research is a follow-up research from my previous research which started from choosing ship models, material strength analysis by material test,  velocity calculation of ship construction until tensile strength analysis of ship construction using finite element method (FEM) analysis. While the compression strength analysis of vessel compression has not been calculated so that this study. In this research Three models have been done to verify the strength of ship construction using finite element method (FEM) analysis. Of the three models, the biggest stresses occur in the inner bottom plate of the capture gear space under Load case 1 condition and load case condition. Load case 1 is empty fish loading condition, 100% net load and 100% fuel while the case load 3 is on when 100% full charge, 100% net load and 10% fuel. The largest compression strength is 15.82 MPa in all load cases with safety factor of 1.26 against the standard given rule class.
Rancang Bangun Sistem Monitoring Arus Dan Tegangan Pada Trafo Distribusi 3 Fasa Dengan Metode Sms Gateway Kukuh Widarsono, Sohibul Hajjah, Akhmad Arif Kurdianto
Techno Bahari Vol 5 No 1 (2018)
Publisher : Politeknik Negeri Madura

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Abstract

Saat ini sistem pemantauan arus dan tegangan pada trafo distribusi tiga fasa PLN masih menggunakan metode manual, yaitu dengan cara mendatangi tiap-tiap gardu distribusi untuk mengukur dan mencatat nilai arus. Pengukuran ini dilakukan dengan tujuan untuk mendapatkan data aliran daya, serta pencegahan peralatan dari kerusakan akibat over load. Untuk itu pengukuran ini dilakukan saat beban puncak, dengan asumsi nilai tersebut merupakan niali peak dari gardu distribusi. Akan tetapi, masih sering dijumpai gangguan berupa overcurrent dan kerusakan pada NH Fuse. Gangguan dan kerusakan tersebut seharusnya bisa diprediksi dengan data pengukuran yang valid. Kerusakan tersebut ditengarai karena metode pencatatan yang masih manual serta kurang validnya data yang diambil petugas yang disebabkan kesalahan pembacaan hasil ukur, penulisan dan penginputan data hasil pengukuran. Pada penelitian ini, kami merancang sebuah alat monitoring arus dan tegangan berbasis mikrokontroller, dilengkapi dengan SMS gateway. Alat ini akan dipasang pada gradu distribusi, guna melakukan monitoring/pengukuran arus dan tegangan pada trafo distribusi 24 jam non-stop. Dengan sistem ini, diharapkan mampu membantu PLN untuk mendapatkan data yang lebih akurat tentang aliran daya pada gardu distribusi. Sehingga reability sistem distribusi tenaga listrik bisa terjaga dengan baik. Dengan penelitian ini diharapkan mampu menjawab permasalahan PLN terkait validitas data pengukuran. Selain itu, penelitian ini diharapkan mampu memberikan dampak positif kepada para dosen POLTERA untuk meningkatkan kuantitas dan kualitas penelitiannya. Sehingga akan banyak bermunculan peneliti-peneliti baru dengan ide dan kreativitas yang unique, tentu ide dan kreativitas baru ini dilandasi dengan keilmuan yang sesuai.
Analisis Drive Shaft Serat Karbon/Epoksi Untuk Kendaraan Roda Empat Penggerak Roda Belakang Firman Alhaffis, Siswandi. B
Techno Bahari Vol 5 No 1 (2018)
Publisher : Politeknik Negeri Madura

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Abstract

Composite applications are required in four-wheel drive vehicles. The drive shaft as a transmitting power and torque from the transmission to the differential. To avoid excessive power consumption in the drive shaft, the drive shaft should be required to have a lighter than a conventional drive shaft (steel). Fuel efficiency can be increased if the weight of drive shaft can be reduced. Another advantage from the use of the drive shaft with a composite material is corrosion resistant. In this study is using the composite carbon fiber/epoxy as a drive shafts for rear-wheel drive vehicle with engine capacity is 1.329 cc has maximum 120 N.m is torque. The length is 785 and is 60 mm diameter were taken from reference SM45C steel drive shaft. The design is using by finite element analysis (FEA) simulation method. Furthermore, the manufacturing process of specimen composite drive shaft to according simulation results recommendations. The research found results of fourteen layers carbon fiber/epoxy for torque of 120 N.m. Replacing the steel drive shaft to carbon/epoxy fibers materials can reduce weight to 51%.
Analisa Pembuatan Paving Permeable untuk Mengatasi Genangan Air Lahan Parkir Kampus Politeknik Negeri Madura Laily Ulfiyaha, Faizatur Rohmaha, Tristiandinda Permata
Techno Bahari Vol 5 No 1 (2018)
Publisher : Politeknik Negeri Madura

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Abstract

Banjir di kota Sampang merupakan bencana yang setiap tahun dialami warga Sampang khususnya di kecamatan kota Sampang. Hal tersebut terjadi karena banyak faktor salah satunya adalah dikarenakan banyaknya bangunan- bangunan di kota sampang yang menutup lahan penyerap tanah, selain itu sebagian besar jalan raya kota Sampang dibangun dengan aspal atau paving block yang kedap air, sehingga air yang menggenang ketika curah hujan tinggi sulit terserap ke dalam tanah. Penelitian ini bertujuan membuat dan menganalisa drainase alternatif pada jalan raya lalu lintas ringan kota Sampang dengan menerapkan paving permeable yang mampu menyerap dengan cepat air ke dalam tanah sehingga tidak terjadi genangan air di jalan raya lalu lintas ringan. Studi kasus di kampus Politeknik Negeri Madura. Metode yang digunakan peneliti adalah dengan melakukan survei jalan raya lalu lintas ringan yang ada di kota Sampang. Sampel yang digunakan adalah tempat parkir POLTERA, jalan perumahan Selong Permai, dan trotoar kota Sampang. Selanjutnya membuat bahan paving permeable yang dapat digunakan di jalan raya lalu lintas ringan dan melakukan pengujian yang sesuai standar nasional Indonesia untuk paving SNI 03-0691-1996 dan ASTM C 119. Pengujian tersebut meliputi uji kuat tekan untuk melihat kekuatan pembebanan, uji run off , dan uji infiltrasi untuk melihat pnyerapan paving permeable terhadap air. Sampai dengan pelaksanaan laporan kemajuan penelitian ini masih menghasil-kan bahan untuk paving yang bisa digunakan pengganti paving block. Hasil uji coba yang dilakukan adalah campuran jerami, semen dan pasir belum mampu menahan beban.
Optimasi Produksi Dengan Menggunakan Metode Downhole Water Loop Pada Sumur Horizontal Untuk Reservoir Minyak Berat Dengan Tenaga Pendorong Air Hesty Fanila
Techno Bahari Vol 5 No 1 (2018)
Publisher : Politeknik Negeri Madura

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Abstract

This paper goal is to observe the best performance in modified DWL well and conventional well for optimize combination of flowrate oil production, flowrate drainage and injection temperature by using the optimization software PETROZILLA based on genetic algorithm for heavy oil reservoir with bottom water drive to the horizontal well types. Production procces for heavy oil reservoir with strong bottom water drive will cause water coning has a complex challenge. Produce heavy oil with bottom water drive mechanism to reduce water coning used method Downhole Water Loop. In this study also be seen the influence DWL with additional heater. From the optimization result be obtained that combination of flowrate oil produstion, flowrate drainage and injection temperature in modified DWL well give the cumulative production oil better than in conventional well.
Analisis Stabilitas Kapal Pbl Conveyor Budi Utomo
Techno Bahari Vol 5 No 1 (2018)
Publisher : Politeknik Negeri Madura

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Abstract

PBL conveyor is a barg vessel that has been modified with the addition of conveyor on the left side of the ship. the addition of this conveyor is used for ship loading and unloading activities. with the addition of conveyor on the left side of the tentukanya will result in changes in the calculation of ship stability. the purpose of this study is to calculate the ship after the conveyor added. The method used is to use numerical method using software help. Reference stability calculation using IMO (International Maritime Organization). 1993. Code A.749 (18) Ch 3 - design criteria applicable to all ships. After recalculation, the maximum GZ arm of the 30 Req (Deg), whereas the reference from IMO arm of GZ maximum is 25 Req (deg). For the safety of recommendation when doing the loading and unloading activity of the minimum minimum tank filler 80%.
Studi Olah Gerak Lambung Kapal Pompong Nelayan Plastik High Density Polythylene Siswandi. B, Muhammad Helmi
Techno Bahari Vol 5 No 1 (2018)
Publisher : Politeknik Negeri Madura

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Abstract

Every object that floats in the water will have oscillation motion. This oscillation motion is defined as the motion of an alternating object around the equilibrium point with the same path and occurs periodically that is repeated over the same time span. Fishing vessel pompong that operate in the sea will encounter uncertain conditions caused by the force from the outside and the force from of the ship itself. In general, the fishing vessel of pompong in Bengkalis area made of from wood in this study are planning a ship model with a base material using high density polyethylene (HDPE) plastic with the main size of ship L = 8.8 m; B = 1.56 m; H = 1.05 m; and T = 06 m. The shape modeling of ship by using maxsurf then the evaluation of seakeeping by using seakeeper to find out the response of hull model to the wave of heave, roll, pitch movement and wave spectrum. Evaluation seakeeping of vessel conducted on two condition that is motionless condition and moving with speed 5 knot. On motionless condition the highest RAO of heave value is 1,362 at an angle of 900, the highest RAO of roll value of 6,674 at an angle of 900, the highest RAO of pitch value of 1.271 at the angle 00 and the wave spectrum at the angles 00, 450, 900 and 1350 have the same value with value of 0,488 rad/s. while at 5 knots the highest RAO of heave value is 1,283 at an angle of 900, the highest RAO of roll value of 6,668 at an angle of 900, the highest RAO of pitch value of 1,193 at an angle of 00 and the wave spectrum at an angle of 00 have the highest value reach out a value 4,61 rad/s.
Identifikasi Osteoporosis Berdasarkan Jumlah Percabangan Trabecular Bone Menggunakan Cosfire Filter Randy Cahya Wihandika, Agus Zainal Arifin, Anny Yuniarti
Techno Bahari Vol 5 No 1 (2018)
Publisher : Politeknik Negeri Madura

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Abstract

Mandibular bone is one of the bones that are affected by the reduction of bone mineral density caused by osteoporosis. Therefore, dental panoramic radiographs have been widely used for the identification of osteoporosis. Previous study has shown that the number of branching differs between normal and low bone-mineral-density patients. However, the low contrast level and the presence of noise in the panoramic radiograph images make the extraction of the structure of the trabecular bone to be difficult. Therefore, an enhancement method is required to enhance the structure of the trabecular bone. In this study, a method to detect the trabecular bone branchings with enhancement on the trabecular bone structure using the line operator method is built. From the structure, the location of the branchings is detected using COSFIRE method. The number of the branching is used to ditinguish between the normal radiographs and the radiographs affected by osteoporosis. Evaluation on the classification is performed on 98 images consisting of 41 images in the osteporosis class and 57 images in the normal class. The evaluation results provide sensitivity, specificity, and accuracy of 0,90244, 0,23214, and 0,51546, respectively. The results show that the proposed method gives better performance than the previous method.

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