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Purnama, Harry
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Aerospace Engineering Chemical Engineering, Chemistry & Bioengineering Engineering Industrial & Manufacturing Engineering Transportation

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KARAKTERISTIK DINAMIK ROTOR BOW THRUSTER 250 KW MENGGUNAKAN PEMODELAN EULER-BERNOULLI BEAM Purnama, Harry; Fadjrin, Budi Noviantoro; Adynugraha, Muhammad Ilham; Ali Nandar, Cuk Supriyadi
Majalah Ilmiah Pengkajian Industri Vol. 13 No. 1 (2019): Majalah Ilmiah Pengkajian Industri
Publisher : Deputi TIRBR-BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/mipi.v13i1.3128

Abstract

Abstrak Perkembangan mesin-mesin elektrik terutama Bow Thruster bagi sektor kemaritiman sangat signifikan. Dari beberapa komponen penting dalam Bow Thruster, rotor terutama poros dan bantalan bearing mempunyai peran penting sehingga  perlu dilakukan analisa. Analisa dinamik merupakan analisa untuk mengetahui sifat-sifat dinamik rotor akibat pengaruh putaran terhadap frekuensi pribadi. Pada makalah ini analisa dinamik dikembangkan dengan pemodelan rotor menggunakan Euler-Bernoulli Beam (EBB). Hasil dari analisa dinamik rotor ini menunjukan putaran kritis dan modus getar dari rotor Bow Thruster. Kata kunci : Rotordinamik, Euler-Bernoilli Beam, Poros, Putaran Kritis, Modus Getar. AbstractThe development of electric machines, especially Bow Thruster, for the maritime sector is significantly increased. The several important components in Bow Thruster, rotors, especially shaft and bearings, have an important role to analyzed. Dynamic analysis is an analysis to determine the dynamic properties of rotors due to the effect of rotation on natural frequency. In this paper a dynamic analysis, rotor modeling was developed using Euler-Bernoulli Beam (EBB). The results of this rotor dynamic analysis show the critical speed and mode shapes of the Bow Thruster rotor. Key Words : Rotor Dynamic, Euler-Bernoulli Beam, Shaft, Critical Speed, Mode Shape.
ANALISIS TRANSIEN UNTUK MEMPREDIKSI KEDALAMAN PENGERASAN PERMUKAAN PADA BAGIAN KRITIS CRANKSHAFT Purnama, Harry
Majalah Ilmiah Pengkajian Industri Vol 10, No 2 (2016): Majalah Ilmiah Pengkajian Industri
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (349.77 KB) | DOI: 10.29122/mipi.v10i2.140

Abstract

Dalam penelitian ini simulasi dinamis transien diterapkan pada crankshaft dengan silinder ganda empat stroke. Analisis elemen hingga dilakukan dengan menggunakan software bantu ANSYS untuk memperoleh tegangan von-misses di lokasi kritis, sedangkan permodelan 3D menggunakan software 3D modeling CATIA. Beban dan kondisi batas yang diterapkan sesuai dengan kondisi engine mounting di ANSYS. Simulasi transien di mana pembebanan didasarkan pada waktu diharapkan dapat memperoleh kedalaman dari konsentrasi tegangan. Hal ini dapat membantu untuk proses m dari crankshaft, pengerasan permukaan. * In this study a transient dynamic simulation was conducted on a crankshaft for double cylinder four stroke engine. Finite element analysis was performed to obtain of von-misses stress at critical locations using ANSYS, while the model creation can be created by well known 3D modeling software CATIA. The load and boundary conditions were applied according to the engine mounting conditions in ANSYS. The simulation with the proper time step be expected depth of stress concentration. It can help to the next process of crankshaft, surface hardening. Kata kunci : Analisa Transient, Time Step, ANSYS, Crankshft, Pengerasan Permukaan.
ANALYSIS OF SPOT-WELDING PITCH ON TOP HAT STRUCTURE AGAINST CRASHWORTHINESS CRITERIA Purnama, Harry; Istiyanto, Jos
Majalah Ilmiah Pengkajian Industri Vol. 15 No. 1 (2021): Majalah Ilmiah Pengkajian Industri
Publisher : Deputi TIRBR-BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The application of spot-welding in the automotive industry, especially the electric-based vehicle frame structure, has been optimized to meet passenger and battery compartment safety factors. The present numerical study of the electric-based vehicle frame structure with the top hat cross-sectional model validated the experimental results of reference, which then modified the spot-welding pitch to determine the crashworthiness effect and criteria. The numerical simulation results show that reducing spot-welding pitch in vertical direction can increase energy absorption (EA) by 1.70% - 9.91%, while bringing spot-welding pitch closer to the flange's outer edge can reduce its maximum force (Fmax) by 8.11% - 21.67%. Keywords: Spot-welding; Top Hat Structure; Crashworthiness; Numerical Simulation; Electric Vehicle.
Co-Authors Adynugraha, Muhammad Ilham Cuk Supriyadi Ali Nandar Fadjrin, Budi Noviantoro Jos Istiyanto