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All Journal Jurnal Rekayasa Mesin Otopro Jurnal Techno Bahari Innovative: Journal Of Social Science Research
Wahid, M. Abdul
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Aerospace Engineering Humanities Automotive Engineering Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Public Health Transportation Other

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Studi Eksperimental Pemisah Minyak-Air Menggunakan Hidrosiklon-Bubble Generator berdasarkan Variasi Diameter Underflow Rimbita, Trismi; Catrawedarma, IGNB.; Novita Sari, Eli; Wahid, M. Abdul; Fiveriati, Anggra
Jurnal Rekayasa Mesin Vol. 24 No. 2 (2024): Jurnal Rekayasa Mesin
Publisher : Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jrm.v24i2.555

Abstract

Oil and water are two liquids that are often usedby both the public and industrial companies. Mixing oil and water need to be separated in various industries such as waste processimg, oil and gas production, and other industrial processes. Hydrocyclone is a separation method with the principle of sparation based on specific gravity which utilizes centrifugal fore by adding a bubble generator to the input section and adding variations in the underflow diameter. This research aims to analyze the performance of a hydrocyclone bubble generator based on underflow variations as oil-water separation. This bubble generator is used to make it easier to suck in air. The variations in underflow diameter used are 10mm, 15mm and 20mm. This research was carried out inject a mixture of oil and water into a hydrocyclone system as a sparation medium. The air flow injeted into the bubble generator uses air flow variations of 0.1, 0.6 and 1.2 lpm (liters/minute). From the research that has been carried out, the results show that the larger the underflow opening, the greater the pressure in the underflow, so that the underflow pressure drop is greater. The smaller the underflow opening, the greater the overflow pressure, so the overflow pressure drop is greater. The greater the input air flow, the greater the difference in underflow and overflow pressure drop. The smaller the valve opening, the lower the efficiency of oil separation in overflow and the greater the efficiency in underflow. The highest efficiency results on overflow are 88.6%.
THE EFFECT OF SHIELDING GAS ON SURFACE DEFECTS AND MECHANICAL PROPERTIES OF MATERIALS AFTER THE GMAW WELDING Catrawedarma, IGNB; Rosi, Azriel Alfito Dela; Wahid, M. Abdul; Pamuji, Dian Ridlo; Sari, Eli Novita; Fiveriati, Anggra
Otopro Vol 20 No 1 Nov 2024
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v20n1.p17-23

Abstract

This research aims to analyze the strength and results of welded joints by testing non-destructive and destructive tests using CO2 and argon shielding gases. The type of welding used was gas metal arc welding with SS400 steel material. After welding, the material was tested using liquid penetrant, porosity, tensile, and bending tests. The results were that CO2 shielding gas tended to have a convex and wide shape, while the welding results from argon gas tended to have a small and flat shape. In both shielding gases, there were defects in undercuts, lack of fusion, and spatter after the liquid penetrant test. The porosity test results have circular spots and irregular lines with holes. The average tensile strength value obtained from argon shielding gas was 255.761 MPa, and CO2 shielding gas produced an average value of 219.671 MPa. The bending strength of the material with argon shielding gas obtained an average value of 729.00 MPa and CO2 gas shielding an average value of 611.99 MPa.
Analisa Kekuatan Konstruksi Pad Eye Towing Hook Kapal Tugboat 27 Meter Dengan Metode Elemen Hingga Mizan, Tenario Aruza; Fiveriati, Anggra; Wahid, M. Abdul; Yudha, I Gusti Ngurah Agung Satria Prasetya Dharma; Hamid, Abdul
Techno Bahari Vol 12 No 1 (2025): Maret
Publisher : Politeknik Negeri Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52234/tb.v12i1.342

Abstract

Towing hook merupakan alat yang digunakan untuk menghubungkan tali penarik (towing line) atau wire rope dari tugboat ke kapal atau objek yang akan ditarik. Beberapa beban tarik mengakibatkan terjadinya distribusi tegangan yang terjadi pada bagian buritan kapal dan daerah sekitar pad eye towing hook akibat gerakan menarik yang dilakukan kapal, yang dapat menimbulkan banyak masalah seperti deformasi, keretakan, kerusakan, patah dll. Analisa tersebut bertujuan untuk mengetahui nilai equivalent stress, deformation dan safety factor dari konstruksi foundation towing hook kapal tugboat, serta mengetahui letak titik kritis pada tiga variasi bracket towing hook yaitu variasi 1 bracket 100 x 100 x 12, variasi 2 bracket 100 x 100 x 16, dan variasi 3 bracket 100 x 165 x 8. Adapun hasil analisis dan perhitungan variasi 1 nilai equivalent stress sebesar 189,64 Mpa, sedangkan untuk variasi 2 nilai equivalent stress sebesar 183,56 Mpa, dan variasi 3 nilai equivalent stress sebesar 183,38 Mpa. Kriteria dari struktur Pad eye Towing Hook dari hasil simulasi yang didapat yaitu Pad eye Towing Hook dengan variasi ketiga lebih baik untuk digunakan atau dioperasikan dikarenakan nilai dari tegangan maksimum lebih kecil dan tingkat deformasi lebih rendah dibanding variasi 1 dan variasi 2.
Analisa Kekuatan Shackle Pada Proses Docking Undocking di Galangan Kapal Menggunakan Metode FEM (Finite Elemen Methode) Abdurrohim, Abdurrohim; Prasetya, Igna Satria; Eko, Rochmad; Wahid, M. Abdul; Oloan, Achdri Fauzi Nugraha
Innovative: Journal Of Social Science Research Vol. 5 No. 3 (2025): Innovative: Journal Of Social Science Research
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/innovative.v5i3.19341

Abstract

Galangan kapal merupakan fasilitas industri maritim yang berfungsi untuk membangun, memperbaiki, dan merawat kapal serta kelengkapannya. Penelitian ini bertujuan untuk menganalisis kekuatan shackle secara menyeluruh untuk mencegah kegagalan structural yang dapat menghambat keberhasilan proses docking dan keselamatan pekerja. Penelitian difokuskan untuk menganalisis dua jenis shackle yaitu shackle bow dan dee, yang keduanya memiliki WLL 85 ton. Metode simulasi yang digunakan adalah menggunakan ANSYS static structural dengan menggunakan material ASTM A322 untuk shackle bow dan ASTM A4145 untuk shackle dee, dengan berat kapal yang ditarik adalah 1269 ton, dengan kemiringan landasan slipway 2°, dengan menggunakan pulley sebanyak 10 lilitan, sehingga diperolah beban aktual sebesar 43.462 N. Simulasi shackle dilakukan dengan variasi sudut tarik 90°, 70°, dan 50°. Dengan hasil menunjukan bahwa tegangan maksimum dari kedua jenis shackle masih berada dalam batas aman material. Deformasi hasil simulasi meningkat saat variasi sudut semakin kecil. Seperti pada shackle bow dengan variasi tarik 50° dengan nilai deformasi 0.059948 mm. dan untuk shackle dee pada variasi penarikan 50°, memiliki nilai deformasi sebesar 0.024232 mm. jadi semakin kecil sudut yang digunakan maka meningkatkan tegangan dan mempengaruhi perubahan bentuk dari shackle.
Co-Authors Abdul Hamid Abdurrohim Abdurrohim, Abdurrohim Anggra, Fiveriati Catrawedarma, IGNB Eko, Rochmad IGNB. Catrawedarma Mizan, Tenario Aruza Novita Sari, Eli Oloan, Achdri Fauzi Nugraha Pamuji, Dian Ridlo Prasetya, IGNA Satria Rimbita, Trismi Rosi, Azriel Alfito Dela Sari, Eli Novita Yudha, I Gusti Ngurah Agung Satria Prasetya Dharma