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All Journal Rekayasa Mesin Mesin Ge-STRAM: Jurnal Perencanaan dan Rekayasa Sipil
Rachman Setiawan
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Civil Engineering, Building, Construction & Architecture Mechanical Engineering Transportation

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PENGGUNAAN TEKNIK APROKSIMASI (METAMODELING) UNTUK MENYEDERHANAKAN MODEL ELEMEN HINGGA DALAM PROSES OPTIMASI Rachman Setiawan
Mesin Vol. 20 No. 1 (2005)
Publisher : Mesin

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Abstract

Complex modelling using Finite element method in iterative optimisation process often yield expensive computation. One of the solution is to replace the expensive finite element analysis with a mathematically simpler model, that is using an approximate relations (Metamodel). Here, the approach is used to characterise the mechanical properties of an anisotropic plate from their corresponding natural frequencies. Radial basis functions model has been chosen for the Metamodel to approximate the finite element model generated in ANSYS 6.1 software. Characterisation process is regarded as an optimisation problem with the objective is to minimise the accumulation of differences between the target frequencies and the updated ones. The use of Metamodel shorten the computation time as well as increase the likelihood of reaching the global minimum. In general, the overall result is reasonably good to predict the mechanical properties of anisotropic plates.
KARAKTERISTIK MODUL PENYERAP ENERGI IMPAK MEKANISME INTERNAL INVERSION DAN AXIAL SPLITTING Rachman Setiawan; Muhammad Hisyam Amir; Bambang Sugiharto; Sigit Fajrianto
Mesin Vol. 21 No. 2 (2006)
Publisher : Mesin

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Abstract

The application of crashworthiness technology to a vehicle has a main objective of protecting the passenger or cargo from the effects of impact/collision. One of the strategies is by using impact energy absorbing (IEA) modules. Two of the alternatives of IEA modules are metallic tubes with internal inversion and controlled axial splitting mechanism. This paper presents both numerical and experimental approaches to understand the characteristics of the two mechanisms, before using them in design phase. LS-Dyna was used as the numerical simulation software for drop test case. The result of simulation is presented as the relationships between geometrical parameters and the crashworthiness parameters, e.g. impact energy and response force. Some cases are compared with quasi-static and drop test results.
REVIEW ON RAMS ANALYSIS FOR RAILWAY VEHICLES WITH POTENTIAL APPLICATION IN RAILWAY SYSTEM OF INDONESIA Muzakki, Sofyan; Gunawan, Leonardo; Rachman Setiawan; Kariem, M. Agus
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1781

Abstract

Railway vehicles are critical for ensuring the reliability and safety of trains, and their complexity has grown with technological advancements. RAMS analysis (Reliability, Availability, Maintainability, and Safety) has become a popular method for assessing the functional requirements of these vehicles. This review specifically investigates RAMS analysis for railway vehicles, aiming to identify trends, developments, key research challenges, and potential application in railway system of Indonesia. By thoroughly reviewing relevant articles, it explores various aspects of RAMS analysis, conducts comparative analyses, discusses potential research directions, and highlights advancements and usage in railway vehicle contexts. The methodology involves formulating research questions, searching the Scopus database for records, and applying assessment criteria to select eligible articles. Results reveal recent developments, distribution of articles, and studies focusing on reliability, availability, maintainability, and safety. This review offers valuable insights into the current state of RAMS analysis for railway vehicles and guides future research and development in this area.
Overview Of RAMS Analysis and ITS Implementation in Railway Vehicles Muhamad Abdurrochman; Rachman Setiawan; Vani Virdyawan
Ge-STRAM: Jurnal Perencanaan dan Rekayasa Sipil Vol. 7 No. 2: September 2024
Publisher : Universitas Dr. Soetomo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25139/jprs.v7i2.8751

Abstract

Reliability, availability, maintainability, and safety (RAMS) analysis, as a tool to ensure performance, safety, and cost-effectiveness throughout the system’s life cycle, has been widely applied in various industries, including the railway industry, specifically railway vehicles. This article provides an overview of various studies exploring the implementation of RAMS analysis in railway vehicles. This literature review consists of an introduction, method, RAMS analysis, results and discussion, and conclusion. Several studies on the implementation of RAMS analysis in railway vehicles are presented and explained, and key points from each study are discussed to provide a comprehensive overview of the implementation of RAMS analysis in railway vehicles. In general, the benefits of the implementation of RAMS analysis are enhanced performance (reliability, availability, and maintainability), safety, and cost-effectiveness of railway vehicles throughout their life cycle. However, many studies only focus on one or a few aspects of performance, safety, or cost-effectiveness without comprehensive discussions of all these aspects. Additionally, many studies only concentrate on the operational phase, including maintenance and repair, without a complete discussion of the entire life cycle from concept to disposal stage.
REVIEW ON RAMS ANALYSIS FOR RAILWAY VEHICLES WITH POTENTIAL APPLICATION IN RAILWAY SYSTEM OF INDONESIA Muzakki, Sofyan; Gunawan, Leonardo; Rachman Setiawan; Kariem, M. Agus
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1781

Abstract

Railway vehicles are critical for ensuring the reliability and safety of trains, and their complexity has grown with technological advancements. RAMS analysis (Reliability, Availability, Maintainability, and Safety) has become a popular method for assessing the functional requirements of these vehicles. This review specifically investigates RAMS analysis for railway vehicles, aiming to identify trends, developments, key research challenges, and potential application in railway system of Indonesia. By thoroughly reviewing relevant articles, it explores various aspects of RAMS analysis, conducts comparative analyses, discusses potential research directions, and highlights advancements and usage in railway vehicle contexts. The methodology involves formulating research questions, searching the Scopus database for records, and applying assessment criteria to select eligible articles. Results reveal recent developments, distribution of articles, and studies focusing on reliability, availability, maintainability, and safety. This review offers valuable insights into the current state of RAMS analysis for railway vehicles and guides future research and development in this area.
Co-Authors Bambang Sugiharto Kariem, M. Agus Leonardo Gunawan, Leonardo Muhamad Abdurrochman Muhammad Hisyam Amir Muzakki, Sofyan Sigit Fajrianto Vani Virdyawan