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Mesin
Published by Institut Teknologi Bandung
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Core Subject : Engineering,
Mechanical Engineering
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Articles 539 Documents
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Penilaian Risiko Dan Perencanaan Inspeksi Pipa Transmisi Gas Alam Cepu-Semarang Menggunakan Metode Risk Based Inspection Semi-Kuantitatif Api 581 Haryadi, Gunawan Dwi; Kustomo, Himawan Kristian; Kim, Seon Jin
Mesin Vol 25, No 1 (2016)
Publisher : Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (460.298 KB) | DOI: 10.5614/MESIN.2016.25.1.2

Abstract

Saluran perpipaan adalah salah satu metode yang paling praktis dan terjangkau untuk transportasi minyak dan gas. Akibatnya, masalah kegagalan pipa semakin banyak terjadi. Faktor ekonomis dan lingkungan serta kehidupan manusia menjadi pertimbangan untuk melibatkan masalah saat ini sebagai integritas struktural dan standar keamanan. Oleh karena itu, keandalan integritas struktural dan keamanan jaringan pipa minyak dan gas dalam berbagai kondisi termasuk adanya cacat harus dievaluasi secara seksama. Tujuan dari penelitian ini adalah mengetahui laju korosi, remaining life time dan risk level serta merekomendasikan penyusunan prioritas inspeksi pada instrumen pipa gas lurus (inlet automatic valve KP-20 Ø 20”), pipa Gas Lurus (Outlet Automatic Shutdown Valve KP-20 Ø 20”) dan sambungan Tee (KP-20 Ø 20”) pada Stasiun Gas KP-20, Blora, Jawa Tengah milik salah satu perusahaan distributor gas alam untuk pembangkit listrik menggunakan metode Risk-Based Inspection menggunakan standard API 581 dengan bantuan software hitung Microsoft Excel. Hasil dari penelitian ini adalah langkah-langkah menentukan Risk Level pada setiap instrumen menggunakan metode Risk-Based Inspection standard API 581 dan hasil berikutnya adalah merekomendasikan perencanaan inspeksi yang efektif berdasarkan Risk Level dan Remaining Life Time.
PENERAPAN KENDALI JARINGAN NEURAL PADA SISTEM GERAKAN LURUS PRESISI Santoso, Ilham Budi; Abidin, Zainal
Mesin Vol 14, No 3 (1999)
Publisher : Mesin

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Abstract

This paper presents an empirical result on the application of neural network controller in a precision straight motion system. As a controller, neural networks learn in two phase. In the first learning phase, neural network was doing inverse system identification. It is called general learning. In the second learning phase, neural network was applied as an adaptif controller which doing online learning. It is ca//ed special learning. Through these two learning phases, neural network shows a good performance for wide range operation with a minimum operator/human intervention.
KUALITAS TENAGA KERJA YANG DIPERLUKAN GUNA MENUNJANG SISTEM-PRODUKSI (INDUSTRI PEMESINAN) MODERN Rochim, Taufiq
Mesin Vol 5, No 1&2 (1986)
Publisher : Mesin

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Abstract

Ketelitian, Ketepatan, Keluwesan, dan Produktivitas Mesin Perkakas NC tidak mungkin dapat dicapai tanpa menyiapkan faktor-faktor pendukungnya. Kesulitan utama dalam memenuhi tuntutan tersebut terletak pada penyiapan tenaga kerjanya. Untuk memperkirakan kualitas tenaga kerja yang dibutuhkan ditinjau suatu sistem Produksi dari Industri Pemesinan Modern. Dalam hal ini dipilih Industri Pemesinan karena industri ini mempunyai sistem produksi yang paling rumit dibandingkan dengan yang lain. Secara singkat ditinjau beberapa pengetahuan khusus yang harus dikuasai beserta tingkat penguasaarmya sesuai dengan tugasnya. Beberapa saran diajukan demi untuk mencapai tujuan diatas.
DAFTAR ALUMNI MESIN ITB Teknik Mesin, Prodi
Mesin Vol 2, No 1 (1983)
Publisher : Mesin

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Abstract

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MODEL MATEMATIS DAN SIMULASI PERPINDAHAN PANAS PROSES PENGECORAN KONTINYU BAJA SLAB Darmanto, Prihadi Setyo; Syahlan, Arief; Koesnohadi, Koesnohadi
Mesin Vol 17, No 2 (2002)
Publisher : Mesin

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Abstract

This paper presents mathematical model and numerical simulation using CFD software FLUENT 5.4 applied on continuous casting process of steel slab. The distribution of temperature of the steel slab since it exits the mould till straightening region was evaluated. The result of numerical evaluation was also compared to the measurement temperature taken at some selected points. The comparison showed that there was a good agreement between the numerical result and the measurement data. The percentage of both liquid and solid phases along the slab was also simulated. It seems that the simulation of solid phase growth could be used as a method for determining the cross section position where the solidification ceases.
PENYARINGAN DATA UJI TERBANG DENGAN TEKNIK "PARAMETER IDENTIFICATION" Jenie, Said D
Mesin Vol 3, No 2&3 (1984)
Publisher : Mesin

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Abstract

Dalam tulisan singkat ini akan diberikan suatu contoh pemakaian teknik parameter identification untuk memperoleh besaran-besaran aerodinamis pesawar udara dari hasil uji terbang. Oleh karena belum tersedianya data uji terbang yang sebenarnya, maka dalam contoh yang akan dibahas, data uji terbang diganti dengan data yang dihasilkan dari persatuan non linear pesawat udara. Parameter yang akan diidentifikasikan adalah koefisien-koefisien yang biasa dipergunakan dalam persamaan gerak linear suatu pesawat udara. Tanpa mengurangi arti yang penting dari proses pengidentifikasian paramter terbang, metoda yang dibahas di sini dapat dipakai langsung pada proses pengolahan data uji terbang yang sebenarnya.
PENERAPAN METODE ENVELOPING UNTUK MENDETEKSI CACAT LOKAL BANTALAN GELINDING Abidin, Zainal; Bagiasna, Komang; Noviyantha, Wayan
Mesin Vol 18, No 1 (2003)
Publisher : Mesin

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Abstract

This paper describes the study and implementation of enveloping method to detect a local bearing defect. First, it discusses the limitation of the conventional methode in bearing defect detention which is widely used in industry nowadays. The steps required to implement enveloping method are then studied and parameters influencing the success of detection process is identified. To demonstrate the effectiveness of the enveloping method, an experiment is performed to detect defect of a bearing with a simulated inner-race defect. The results of this study show that the enveloping method capable of detecting inner-race defect on a bearing in the situation where the conventional method fail to detect it.
ACCEPTANCE TEST MESIN PERKAKAS Yuwana, Yatna
Mesin Vol 4, No 3&4 (1985)
Publisher : Mesin

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Abstract

Untuk dapat mengetahui kualitas yang dimiliki oleh suatu mesin perkakas perlu dilakukan acceptance test pada mesin perkakas tersebut, Acceptance test ini dapat meliputi aspek ketelitian geomteri, prestasi kerja, dan kebisingannya. Penilaian dari kualitasnya dapat dilakukan dengan membandingkan harga-harga pengetesannya terhadap harga-harga/toleransi yang ada pada standar. Ada bermacam-macam standar pengetesan yang dapat diikuti, walaupun demikian dengan alasan-alasan tertentu tidak tertutup kemungkinan untuk mengembangkan metode pengetesan sendiri asalkan secara teknis dapat dipertanggungjawabkan.
KAJI EKSPERIMEN OPTIMASI KOEFISIEN DAYA SKEA JENIS POROS DATAR DENGAN SUDU GABUNGAN SILINDER BERPUTAR DAN ROTOR SAVONIUS Soetanto, Maria F; Suwono, Aryadi; Darmanto, Prihadi S; Pasek, Ari D
Mesin Vol 19, No 2 (2004)
Publisher : Mesin

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Abstract

Horizontal Axis Wind Energy Conversion System (HAWECS) is more efficient than other Wind Energy Conversion Systems at the same condition [2,3]. Rotating cylindrical blade is taken as the substitute alternative to the airfoil blade considering that presence of lift force and its simple manufacturing production. The lift force generated by the rotating cylinder is known as the Magnus Effect [1,7,9]. The savonius rotor in this research is employed to propel the cylinder. This research conducted an experiment to optimize the energy conversion of a HAWECS which its blades consist of the combination of cylinder and savonius rotor. Two kind of blades were used in this experiment, i.e.blade with L/D (ratio of the length and diameter of cylinder) equals to 3 and 4. Three variations of wind velocities were used, i.e. 8.5 m/s, 9.7 m/s, and 10.2 m/s. Experimental results present that the blade with L/D ratio = 4 give more efficient than the L/D = 3, and the increase of power was reached if the wind velocity increases.
BEBERAPA ASPEK MEKANIKAL DALAM PERENCANAAN BAN BERJALAN LINTAS DARATAN Toha, Juanda
Mesin Vol 8, No 1&2 (1989)
Publisher : Mesin

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Abstract

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