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All Journal Rekayasa Mesin Majalah Ilmiah Pengkajian Industri
Fadjrin, Budi Noviyantoro
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Aerospace Engineering Chemical Engineering, Chemistry & Bioengineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering Transportation

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PENGARUH PEMUAIAN PANAS TERHADAP KELURUSAN POROS TURBIN UAP Febriansyah, Dwijaya; Tambunan, Barman; Harmadi, Rudias; Fadjrin, Budi Noviyantoro
Majalah Ilmiah Pengkajian Industri Vol 14, No 1 (2020): Majalah Ilmiah Pengkajian Industri
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/mipi.v14i1.3971

Abstract

Sebagian besar penyebab kegagalan pada mesin-mesin rotasi termasuk turbin uap adalah poros yang berputar dalam kondisi misalignment. Pada turbin uap, panas yang merambat pada casing dapat merubah dimensi turbin uap karena adanya pemuaian (thermal growth) sehingga mempengaruhi kelurusan poros saat berputar. Nilai thermal growth ini perlu diketahui sebagai salah satu spesifikasi dalam penyetelan poros sebelum turbin beroperasi. Dalam studi ini,  thermal growth pada turbin uap 3 MW diinvestigasi dengan mengukur kelurusan poros dalam kondisi panas setelah berhenti berputar dan dingin menggunakan metode laser alignment. Hasil pengukuran menunjukkan bahwa thermal growth memberikan pengaruh terhadap kelurusan poros karena adanya selisih nilai kelurusan poros saat kondisi panas dan dingin yaitu 1.0 thous (gap) dan 2.8 thous (offset) pada bidang vertikal kemudian -1.0 thous (gap) dan -2.7 thous (offset) pada bidang horisontal.Kata kunci : Turbin uap, Thermal growth, Kelurusan porosMost of the causes of rotating machines failure including steam turbine is shaft misalignment. In the steam turbine, heat that travels to the casing can change steam turbine dimension due to thermal growth which affects the shaft alignment. Thermal growth values needs to be known as one of the specifications in shaft alignment setup. In this study, thermal growth on 3 MW steam turbine was investigated by measuring the shaft alignment in hot after shut down and cold condition using laser alignment method. Results show that thermal growth has an influence on shaft alignment due to difference of alignment values when hot and cold conditions, namely 1.0 thous (gap) and 2.8 thous (offset.) in vertical plane then -1.0 thous (gap) and -2.7 thous (offset.) in horizontal plane.Key Words : Steam Turbine, Thermal growth, Shaft alignment 
MESH CONVERGENCE TEST BY USING FINITE ELEMENT ANALYSIS (FEA) IN SHAFT LOADING OF 2 KW INDUCTION MOTOR Hotma, Lambert; Majid, Nur Cholis; Marsalyna; Hendrawan , Jekki; Kinasih, Nirma Afrisanti; Febriansyah, Dwi Jaya; Novariawan , Bayu; Alfin , Muhammad Reza; Putri, Intan Satwika; Ghufron, Hanif; Afif, Muhammad Thowil; Fadjrin, Budi Noviyantoro; Purnomo , Endra Dwi
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.v15i3.1516

Abstract

Finite Element Analysis (FEA) is a calculation tool to find out a determined solution for a complex structure subjected to some certain static load. To obtain the most valid solution from this analysis, one of the parameters needed is mesh convergence test. This paper discusses the mesh convergence test by using FEA in a 2-kW induction motor shaft where the motor is used in an electric motorcycle. FEA was carried out by using static structural module in ANSYS 14.5 software. The shaft was subjected to static load from rotor and pulley weight. These loads were supported by a pair of ball bearing. Furthermore, the shaft was meshed by using various sizes of mesh to find out the effects to mesh convergence. The applied mesh sizes were 3; 2,5; 2; 1,5; and 1 mm. These simulation results represented the value of deformation and stress on the shaft. The convergence test was depicted in a graph of elements number vs. deformation and elements number vs. Von – Mises stress. The maximum deformation was located around rotor seat, while the minimum one was around the rear bearing seat. On the other hand, maximum and minimum Von – Mises stress appeared around rear bearing seat. Overall, it can be concluded that the results of deformation and Von – Mises stress had reached convergence
MESH CONVERGENCE TEST BY USING FINITE ELEMENT ANALYSIS (FEA) IN SHAFT LOADING OF 2 KW INDUCTION MOTOR Hotma, Lambert; Majid, Nur Cholis; Marsalyna; Hendrawan , Jekki; Kinasih, Nirma Afrisanti; Febriansyah, Dwi Jaya; Novariawan , Bayu; Alfin , Muhammad Reza; Putri, Intan Satwika; Ghufron, Hanif; Afif, Muhammad Thowil; Fadjrin, Budi Noviyantoro; Purnomo , Endra Dwi
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.v15i3.1516

Abstract

Finite Element Analysis (FEA) is a calculation tool to find out a determined solution for a complex structure subjected to some certain static load. To obtain the most valid solution from this analysis, one of the parameters needed is mesh convergence test. This paper discusses the mesh convergence test by using FEA in a 2-kW induction motor shaft where the motor is used in an electric motorcycle. FEA was carried out by using static structural module in ANSYS 14.5 software. The shaft was subjected to static load from rotor and pulley weight. These loads were supported by a pair of ball bearing. Furthermore, the shaft was meshed by using various sizes of mesh to find out the effects to mesh convergence. The applied mesh sizes were 3; 2,5; 2; 1,5; and 1 mm. These simulation results represented the value of deformation and stress on the shaft. The convergence test was depicted in a graph of elements number vs. deformation and elements number vs. Von – Mises stress. The maximum deformation was located around rotor seat, while the minimum one was around the rear bearing seat. On the other hand, maximum and minimum Von – Mises stress appeared around rear bearing seat. Overall, it can be concluded that the results of deformation and Von – Mises stress had reached convergence
Co-Authors Afif, Muhammad Thowil Alfin , Muhammad Reza Barman Tambunan, Barman Febriansyah, Dwi Jaya Febriansyah, Dwijaya Ghufron, Hanif Harmadi, Rudias Hendrawan , Jekki Hotma, Lambert Kinasih, Nirma Afrisanti Majid, Nur Cholis Marsalyna Novariawan , Bayu Purnomo , Endra Dwi Putri, Intan Satwika