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Fakultas Teknik Universitas Gresik Jalan A.R Hakim No 2B, Gresik
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Wahana Teknik
Published by Universitas Gresik
ISSN : 2252777X     EISSN : 2657022X     DOI : https://doi.org/10.5281/zenodo
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture Engineering Mechanical Engineering
Wahana Teknik merupakan wadah publikasi ilmiah yang menyajikan hasil-hasil penelitian berupa makalah terkait bidang Teknik Mesin dan Teknik Sipil. Jurnal Wahana Teknik diterbitkan oleh Fakultas Teknik Universitas Gresik. Pada tahun 2017 jurnal Wahana Teknik terbit berkala dua kali per tahun. Makalah dapat berupa ringkasan laporan hasil penelitian atau kajian pustaka ilmiah. Makalah yang akan dimuat hendaknya memenuhi format yang telah ditentukan. Bahasa yang digunakan pada jurnal ini adalah bahasa Indonesia.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 98 Documents
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Perancangan Gear Box Penarik Kapal Sistem Airbag Kapasitas 7000 Ton Meryanalinda; Wardjito; Wijaksi Dimas Putra
Wahana Teknik Vol 8 No 1 (2019): Wahana Teknik
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Abstract

Gear box merupakan sistem yang berfungsi untuk mengonversi torsi dan kecepatan (putaran) dari mesin menjadi torsi dan kecepatan yang berbeda-beda untuk diteruskan ke penggerak akhir. Konversi ini mengubah kecepatan putaran yang tinggi, menjadi lebih rendah tetapi bertenaga. Salah satu sistem gear box adalah roda gigi. Roda gigi sendiri berperan sebagai pereduksi putaran dari momen torsi pada keadaan yang bervariatif dan diperlukan perancangan yang sesuai dengan kondisi yang diharapkan. Selain harus memiliki rancangan yang sesuai, gear box juga harus dapat meredam getaran yang timbul akibat perputaran dan pergesekan antar roda gigi. Dalam penelitian ini dilakukan pengukuran untuk mendapatkan ukuran dimensi dari roda gigi, poros, pasak dan bantalan. Kemudian dicari momen gaya yang bekerja. Serta mencari faktor keamanan dan bahan yang dipakai AISI 4140, AISI 1095 dan AISI 52100 didasarkan pada kekuatan lentur dan kekuatan tarik. Hasil penelitian ini menunjukkan bahwa pada kapal sistem airbag dibutuhkan dua gear box dengan nilai torsi 23.814,6 kg.m persatu gear box, diameter tali baja 52 mm, panjang tali baja 512 m, diameter drum winch 1.500 mm dan panjang gear box 2.000 mm. Kata kunci: bantalan, gear box, pasak, poros, roda gigi
Perencanaan Make Up Water Tank Kapasitas 500 kl PLTGU Blok I, II, dan III PT PJB UP Gresik Meryanalinda; Wardjito; Ahmad Setyawan
Wahana Teknik Vol 9 No 2 (2020): Wahana Teknik
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Abstract

At the steam gas power plant (PLTGU) there are various kinds of equipment, namely common, Gas Turbine (GT), Steam Turbine (ST). In common, the main water system has a very important role. Where the water raw material will later be used as a cooling system & the main ingredient into steam (dry steam). This process starts from processing seawater into feed water that has a certain pH and conductivity, then it is processed in the water treatment plant (pH 8-9 and conductivity ≤ 1 µ/cm). To maintain the supply of the main ingredient of water, it is necessary to have a storage that functions to ensure the availability of make up water supply during normal unit operation. This research was conducted to find out in planning the make up water storage tank with a capacity of 500 kl at PLTGU Gresik Generation Unit. Dimension of make up water tank is 9,125 m high & 10 m diameter and using ASTM A36 material in accordance with API 650 standard. The calculation results are known that the thickness of the 1st shell plate is 7 mm, the 2nd shell plate is 6 mm, the 3rd shell plate is 5 mm, and the 4th shell plate is 5 mm. The thickness of the bottom plate and annular plate is 10 mm, with the results of these calculations it is recommended that a welding procedure be made according to the thickness of the shell plate. Keywords: API standard 650, Make up, Tank, Treatment, Water, Welding
Analisa Kekasaran Permukaan Pada Proses Pembubutan Material AISI 4140 dengan Nose Radius dan Cutting Parameter yang Berbeda Masrufaiyah; Sugeng Hariyadi; Mochammad Miftahurrohman
Wahana Teknik Vol 9 No 1 (2020): Wahana Teknik
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Abstract

The process of machining the shaft can be done using a lathe where it is often obtained that the surface roughness value is not as desired. This is influenced by several factors including the nose radius on the tool geometry and cutting parameters. To determine the effect of these two factors, this study used AISI 4140 material with a WNMG Sumitomo type carbide chisel with a nose radius R 04 and R 08 as well as different feeding starting from F 70, F 80, F 90, F 100, F 110 and F 120 and using the same Rpm, Rpm 900. The results show that to achieve a roughness value of N8 with a roughness value of 3.2 m, a tolerance of 2.4 m–4.8 m, the tool radius and feeding used include: R 04 with F 70 with a value of 3.101 m, R 04 with F 80 with a value of 4.050 m, R 08 with F 90 with a value of 2.562 m, R 08 with F 100 with a value of 3.164 m, R 08 with F 110 with a value of 3.828 m, R 08 with F 120 with a value of 4,556 m. Based on the roughness value (Ra), the larger the nose radius used, the lower the roughness value obtained. The more nose radius used, the higher the roughness value obtained. Keywords: AISI 4140, Cutting, Nose, Parameter, Radius, Roughness, Surface.  
Analisa Laju Korosi Galvalum I dan Galvalum II Terhadap Media Air Sumur dan Air Laut Masrufaiyah; Agus Setiyo Umartono; Nando Arifal Hisyamuddin
Wahana Teknik Vol 9 No 2 (2020): Wahana Teknik
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Abstract

The use of lightweight steel roof trusses (galvalume) is currently increasing, given the increasingly expensive and scarce wood prices. When compared to wood, galvalume is also more durable because it cannot be eaten by termites. In this study, the quality of 2 galvalumes, namely aplus and galvatruss, will be tested against the corrosion rate due to rainwater and seawater. The purpose of this study was to determine the effect of differences in the quality of galvalume on the corrosion rate due to rainwater and seawater. This corrosion rate study was carried out directly electrochemically using a tool to measure the corrosion rate, namely potentiostat, using regression methods and polarization techniques, namely based on electrochemical reactions at the anode and cathode that occurred in the galvalume constituent material which had been electrified. The results of the study concluded that galvatruss galvalume is better than aplus galvalume. This is evident in the corrosion rate test, the value of the corrosion rate of galvatruss galvalume is lower than the value of the aplus galvalume corrosion rate, both with rainwater and seawater. Keywords: corrosion, galvalume, rates, seawater, wellwater.    
Analisis Penerapan Manajemen Waktu pada Pembangunan Rumah Tinggal di Gapurosukolilo Gresik Saiful Hakiki; Bowo Leksono; Valentino Maulana Syahputra
Wahana Teknik Vol 8 No 2 (2019): Wahana Teknik
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Abstract

Pada pembangunan rumah tinggal di gapurosukolilo gresik terjadi beberapa ketidaksesuaian dengan rencana pemborong, seperti terindikasi keterlambatan pekerjaan karena ada pekerja yang tidak masuk sehingga harus ada alternatif agar tidak sampai terjadi keterlambatan pada waktu penyelesaian pekerjaan tersebut. Tujuan dalam penelitian ini adalah:1. Untuk mengetahui manajemen waktu yang tepat. 2. Untuk mengetahui apakah sesudah menerapkan manajemen waktu dapat selesai tepat waktu. 3. Untuk mengetahui hambatan apa saja yang dihadapi dalam penerapan manajemen waktu. Metode yang digunakan dalam penelitian ini adalah metode deskriptif. Metode deskriptif dilakukan dengan cara mendeskripsikan, dengan maksud untuk menemukan unsur-unsurnya dan kemudian dianalisis. Kesimpulan yang diperoleh dalam penelitian ini antara lain:1. Berdasarkan jaringan kerja pada AON dengan logika saling ketergantungan dari satu pekerjaan ke pekerjaan yang lain maka jangan sampai pekerjaan yang mempunyai nilai slack (SL) NOL. 2. Percepatan pada durasi pekerjaan dilakukan pada pekerjaan yang memiliki dampak besar pada pekerjaan lain setelahnya. Sehingga apabila pekerjaan setelahnya memiliki nilai slack (SL) NOL bisa menyesuaikan jika ada keterlambatan pekerjaan. 3. Selain berdampak pada pekerjaan setelahnya, percepatan juga berdampak pada kesiapan alat dan material untuk melakukan aktifitas setelahnya. Kata kunci: lembur, manajemen waktu, percepatan, schedule
Analisis Struktur dan Perencanaan Ketahanan Gempa (SNI 1726:2012) Warehouse PT. X di Gresik Akhmad Andi Saputra; Dandy Nugroho; Ahmad Muwafiqudinulhaq
Wahana Teknik Vol 9 No 2 (2020): Wahana Teknik
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Abstract

Warehouse is a building to store a variety of necessary products for a company, it could be said that warehouse is collection point and starting point of the goods that will be distributed to the retailer or directly to the consumer. In cases that took place at the warehouse in PT.X is a building which had height of 26 meters and span of 25 meters that has earthquake-prone and wind loads. This makes researcher need to do structure analysis and planning of warehouse resilience of PT.X in Gresik.This study uses SNI 1726:2012 for planning earthquake resistance of building and non-building structures. The step of structure analysis of rafters, gordings, beams and columns as follows: 1. Input data into STAAD pro (structure modelling), 2. Control the strength of rafter structures, gordings, beams and columns using the largest external force data based on calculations from STAAD pro.The results of this study are: 1. The structural resistance to combined loads according to SNI 1726:2012 shows an indication of the inability of the steel profile on the H 350 x 175 rafter and on the H 250 x 125 beam with the actual value of the allowable ratio more than 1.00, 2. The rafter profile is replaced with I 450 x 175 x 11 profile which has a ratio value of 0.7818 and the beam profile is replaced with H 250 x 250 x 9 x 14 which has a ratio value of 0.1996, both steel profiles have indicated pass result. Keywords: Analysis, STAAD Pro, Steel, Structure.
Optimasi Waktu Pelaksanaan Pembangunan Ruang Praktik Siswa SMK Negeri 1 Duduksampeyan dengan Metode PERT Bowo Leksono; Dandy Nugroho; Eva Indah Yanti
Wahana Teknik Vol 9 No 2 (2020): Wahana Teknik
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Abstract

Implementation of work on a project requires not only reliable human resources, but also a good management. A construction project can be said to be successful if it is able to meet its objectives that is completed at the specified time, in accordance with the allocated costs and meet the required quality. Or failure of the implementation is often caused by lack of planned project is not effective and efficient, this will cause delays, lack of quality work, and too large funding is not in accordance with initial planning. In this paper the author uses planning techniques with network planning as one of the models that will be used in the implementation of the student practice room development project at SMK Negeri 1 Duduksampeyan. The planning technique used by the author is PERT. This technique is used to optimize the construction project construction where the author examines issues related to time. By comparing the actual situation and the plan, it can be seen whether the progress of the relevant project is on schedule or delayed. From the research that has been done, it is obtained using a time schedule. Based on the analysis using the PERT method the result is the opportunity to achieve the target time for completion of the project from 90 days to 72 days is 99.75% and the project cost increased to Rp 423,380,476.82 from the original planned cost of Rp 422,066,726.74. There was a reduction in project time for 18 days and an increase in costs of Rp 1,313,750.08. Keywords: network, optimation, PERT, planning.
Sensitivitas Kelayakan Investasi Rumah Susun di Kabupaten Sidoarjo Eddy Priyanto; Tri Yuliyanti
Wahana Teknik Vol 10 No 1 (2021): Wahana Teknik
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Abstract

The development of an apartment as an investment that involves a large amount of funds with the hope of getting a profit in the long term, often has a big impact on the survival of the company. To anticipate the trend of changes that occur, it is necessary to do a sensitivity analysis. The goal to be achieved is to find out what will happen to the results of the project analysis if there is a change. Changes in cost and price increases will affect the amount of Net Present Value (NPV), Payback Period (PP), Internal Rate of Return (IRR), Profitability Index (PI) and the initial risk analysis. This study uses a quantitative approach through empirical calculations in its analysis. The conclusion is that the NPV that uses a 30% occupancy risk level of depreciation is supported by an 80% increase in income and a reduced expenditure by 50%, so the Pucang Flat Phase II development plan is feasible. This is clarified by the result of NPV3 = IDR 3,409,790,045.00 because it is greater than zero. The payback period obtained is lower than the specified limit, namely the PP value = 24.67 years < 25 years. And for the results of the IRR calculation analysis, the results obtained are IRR = 14.7% > 14%. Then from the analysis of the calculation of the Profitability Index (PI) method, it was obtained a value of 1.23 which means that the Pucang Flat Phase II development is feasible to be carried out. However, when viewed from the level of risk based on the value of NPV1 = IDR -16,909,705,762.00, NPV2 = IDR -14,529,162.110.00 and NPV3 = IDR 3,409,790,045.00 which have probabilities of 0.1 and 0.2 and 0.7, it is explained that the investment in the development of Pucang Flat Phase II is very risky to implement. Overall, from the results of the analysis for the feasibility of investing in the development of Pucang Flat Phase II in Sidoarjo Regency, it is feasible to carry out. Keywords: feasibility, flat, investment, sensitivity, sidoarjo
Perencanaan Ulang Sistem Saluran Drainase di Kecamatan Menganti Kabupaten Gresik Dandy Nugroho; Bowo Leksono; Irani Sholikhah
Wahana Teknik Vol 10 No 1 (2021): Wahana Teknik
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Abstract

Sub district Menganti is one of sub districts of the district of Gresik. The region during the rainy season is often suffered flooding. The flooding problem is likely to arise as result of inadequate channels capacity, changes in land use, drainage network system which is not connected properly, and the lack of public awareness of the importance of maintaining the drainage channels, as well. The final project aims to design the drainage system in the sub district of Menganti-Gresik. Drainage is also interpreted as an effort to control groundwater quality in relation to salinity. The purpose of this study is to plan drainage channels in the Menganti District, Gresik Regency. Data or information used is secondary data obtained from the Public Works Department and primary data obtained from direct surveys in the field. The data processing method uses manual calculation in accordance with the rational method for calculating rain discharges, and the manning formula for channel discharges. The conclusions that can be drawn from this research are: 1) Floods that occur are caused by many areas that do not have a well-integrated drainage network system. 2) The design flow velocity for secondary drainage is 1.93–3.19 m/s. The dimensions of the secondary drainage channel are rectangular with variations in width 0.94–2.28 m and channel height 0.47–1.14 m. 3) The design flow velocity for primary drainage is 2.4–4.5 m/s. The dimensions of the primary drainage channel are rectangular with variations in width of 0.91–1.62 m and channel height 0.5–0.8 m. Keywords: drainage, gresik, menganti, re-planning
Analisis Kekuatan Pondasi Tangki Fame Biodiesel pada Proyek PT. X di Gresik Irawan Agustiar; Ikhtisholiyah; Subali
Wahana Teknik Vol 10 No 1 (2021): Wahana Teknik
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Abstract

In the current era of globalization, many countries are competing to open themselves as wide as possible, so that investors can be interested in investing. It is an extraordinary gift in this country, where oil palm plants thrive on the islands of Sumatra, Kalimantan, Sulawesi to Papua, which can be a renewable energy power today and in the future. Where energy from fossil fuels will one day run out, while biodiesel can still exist by cultivating oil palm plants continuously. This is truly an extraordinary breakthrough for all nations in the world, because this energy can be renewed. Ease of bureaucracy is created so that investors continue to develop and build factories that process derivatives from vegetable oil, into fuel oil known as fame (fatty acid methyl ester) biodiesel. The increasing demand for fame in the national and international markets has prompted the company to establish processing plants and tanks as a place to store fame liquid. The Fame Biodiesel Tank is a temporary storage place for liquid oil or bulk oil for companies before being distributed to gas stations or to end users. The importance of this storage tank is to store daily products so that the tank capacity is made quite large 5000 kL, this requires an analysis of the strength of the foundation so that the tank is safe when in use. In the discussion of the design, the calculated loads are dead load 5,957.57 kg/m2, live load 22,555.22 kg/m2, wind load 240,249.24 kg/m, earthquake overtuning moment 8,207,090 kg.m, and combined loads. This data was then analyzed using the standard SNI-1726-2012 and API 650 (American Petrolium Institute) followed by analysis using the Staad Pro Advanced software, the design strength of the pile bearing capacity was 95 ton/point, using a concrete plate thickness of 60 cm thick, with iron BJTD reinforcement with a diameter of 16 mm with an axle spacing of 150 mm. Application of standards SNI-1726-2012 and API 650 (American Petrolium Institute) and calculations using Staad Pro Advanced software, so that calculations are faster and more accurate so that the construction of tank buildings built on foundations using pile foundations is really strong and can withstand load of the oil liquid to the maximum according to its capacity. It was concluded in this study that with a tank diameter of 19.26 meters and a height of 22.5 meters, the maximum moment Mx = 2.998 MT.m, My = 189.171 MT.m, pile bearing capacity 95 ton/point, 85 points @ 22 meters. In the process of changing the liquid product in the tank from fame biodiesel liquid (density 0.88) to crude palm kernel oil (density 0.9156), or with refined bleached deodorized palm kernel oil (density 0.9160), the condition the tank is still safe and the fluid can be replaced. Keywords: analysis, biodiesel, foundation, pile, staad pro, spun, tank.

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