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All Journal Jurnal Teknik Mesin Journal of Engineering and Technological Sciences Mesin Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) Jurnal Polimesin SISTEMIK : Jurnal Ilmiah Nasional Bidang Ilmu Teknik
Rachman Setiawan
Faculty Of Mechanical And Aerospace Engineering, Institut Teknologi Bandung
Aerospace Engineering Automotive Engineering Control & Systems Engineering Decision Sciences, Operations Research & Management Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Journal : Mesin

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KARAKTERISTIK MODUL PENYERAP ENERGI IMPAK MEKANISME INTERNAL INVERSION DAN AXIAL SPLITTING Setiawan, Rachman; Amir, Muhammad Hisyam; Sugiharto, Bambang; Fajrianto, Sigit
Mesin Vol 21, No 2 (2006)
Publisher : Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (788.351 KB)

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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (254.821 KB)

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.
Perancangan Anticlimber sebagai Perangkat Crashworthiness untuk Kereta Penumpang Indonesia Rachman Setiawan; Faza Ahmad; Dodi Dodi; I Wayan Suweca
Mesin Vol 29 No 1 (2023)
Publisher : Faculty of Mechanical and Aerospace Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/MESIN.2023.29.1.5

Abstract

Anticlimber merupakan komponen pengaman untuk meningkatkan aspek crashworthiness, yang berfungsi khusus mencegah terjadinya fenomena overriding (tumpang tindih) saat tumburan kereta api yang dapat menyebabkan dampak jatuhnya korban jiwa yang signifikan. Sebagai rangkaian riset dan pengembangan untuk menerapkan teknologi crashworthiness pada kereta penumpang nasional, dikembangkan rancangan anticlimber yang sesuai dengan kereta penumpang produk industri nasional saat ini. Rancangan menggunakan konsep ribs terpisah yang dipasang pada kedua ujung kereta tepat di kanan dan kiri coupler. Anticlimber dirancanga sehingga dapat diintegrasikan dengan mudah tanpa terlalu lama mengganggu operasional KA, dan dapat diproduksi di dalam negeri dan tentunya efektif menahan gerakan vertikal (climbing) antar kereta. Analisis keefektifan rancangan anticlimber ini diuji dengan simulasi beban statik maupun beban dinamik berdasarkan kriteria standar internasional, yaitu BS EN 13227 yang dinilai paling lengkap mengatur aspek crashworthiness di perkeretaapian. Dari analisis kekuatan statik yang telah dilakukan, terbukti bahwa rancangan mampu menahan beban gaya longitudinal 60 tonf (177,6 kN) dan gaya angkat vertikal 12 tonf (588 kN) dan saat terjadi tumburan. Sedangkan dari simulasi dinamik pada kecepatan tumburan 10 m/s (36 km/jam), sesuai kriteria BS EN, dan kecepatan tinggi 20 m/s (72 km/jam), keberadaan anticlimber terbukti memenuhi standar dan mampu menurunkan kemungkinan terjadinya tumpang tindih, dibandingkan jika tanpa antilimber. Dengan hasil ini, dapat disimpulkan bahwa rancangan memiliki prospek yang baik untuk dikembangkan ke purwarupa dan pengujian lapangan, yang menjadi tahap berikutnya dari penelitian ini.
Co-Authors Akbar, Musthafa Amir, Muhammad Hisyam Bambang Sugiharto Delima Yanti Sari Dewi Mulyasari Dodi Dodi Fajrianto, Sigit Faza Ahmad I Wayan Suweca Mohammad Rusyad Salim Muhammad Idris Muhammad Idris Naufal Aflah Hibatullah Tito Dwi Prakasa Tito Dwi Prakasa