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All Journal Sinergi FLYWHEEL : Jurnal Teknik Mesin Untirta JPPM (Jurnal Pengabdian dan Pemberdayaan Masyarakat) International Journal of Advanced Technology in Mechanical, Mechatronics and Material (IJATEC) JTTM: Jurnal Terapan Teknik Mesin Automotive Experiences AME (Aplikasi Mekanika dan Energi) : Jurnal Ilmiah Teknik Mesin

Subekti Subekti

Universitas Mercu Buana

Author-ID : 2082892

Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Transportation Other

Published : 32 Documents Claim Missing Document

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IMPLEMENTATION OF FREQUENCY RESPONSE FUNCTION ON TAPPER BEARING MAINTENANCE Ari Susanto; Setyo Qomarudin Yusuf; Abdul Hamid; Haris Wahyudi; Subekti Subekti
SINERGI Vol 23, No 2 (2019)
Publisher : Universitas Mercu Buana

Bearing acts as a pad that supports a shaft to rotate without excessive friction, hold the radial load and maintain the motion towards the left and right shafts (Thrust Load) when turning together. Due to frequent taper bearing damage to the wheels, predictive maintenance is therefore necessary. One of the predictive maintenance methods widely used today is vibration analysis. The principles of vibration-based bearing damage detection using the Frequency Response Function (FRF) method will be shown in this paper. Harmonics signal is given to the bearing surface in a vertical or perpendicular direction to the taper bearing surface. The vibration response measurement was carried out on three axes (x, y, and z). The results of this study indicated the ability of FRFs to predict any damage on the bearing taper.

INSPECTING A BUMP TEST IN THE MAINTENANCE OF A 1200-CC DAIHATSU SIGRA DISC BRAKE Subekti Subekti; Abdul Hamid; Basuki Dwi Effendy; Agung Wahyudi Biantoro
SINERGI Vol 23, No 3 (2019)
Publisher : Universitas Mercu Buana

A motorized vehicle needs a system that can not only reduce the speed and stop the vehicle but can also serve as a safety tool and ensure a safe distribution which is called a braking system. It is important to conduct maintenance of a disc brake that is part of the braking system. Therefore, this study developed a technique to inspect a 1200-cc Daihatsu Sigra disc brake through the vibration measurement using a bump test. A disc brake is comprised of three fields: A (located next to the center of the disc brake), B ( in the middle diameter), and C ( in the outer diameter of the disc brake). Each field has ten measurement points. This study showed that disc brake damages occurring in field A were at points 1-3, and they appeared after the 250-Hz frequency. Meanwhile, in fields B and C, at all measurement points, there were no changes taking place at any frequency.

DYNAMIC CHARACTERIZATION OF BALL BEARING IN TURBINE PROPELLER USING BUMP TEST METHOD Monika Audiya Pratiwi; Muhammad Ikhsan; Rio Duzan Octavianto; Abdul Hamid; Subekti Subekti
SINERGI Vol 25, No 2 (2021)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2021.2.004

Bearing is an essential component in a mechanical rotating equipment system. It is no less important than lubrication to prevent wear is very important to consider in the mechanical maintenance system of rotating equipment. Bearing wear is one of the problems in wind turbines that will increase maintenance costs, shorten the wind turbines' lifespan, and cause the component or overall damage to the wind turbine. The latest technology has provided instruments for analyzing the damage of elements in a bearing according to the caused vibrations. Therefore, this study was performed on Ball Bearing Turbine Propeller to identify the dynamic characteristics of Ball Bearing with and without lubrication. The test was carried out using the Bump Test method applied in three measured parts: X, Y, and Z axes. The measuring instrument which was used was Fast Fourier Transform (FFT) Analyzer (Ono Sokki) and the data were analyzed using MATLAB. It was identified that the application of oil could reduce the amplitude and decrease the frequency. Personal frequency appearing more than once indicates the existence of global vibration modes. The frequency which only appears once in the measurement spot indicates local vibration modes. The highest frequency both after and before the application of oil was found in the Y-axis.

STUDYING THE DYNAMIC CHARACTERISTICS TO LENGTHEN THE OPERATING LIFE FOR A DIESEL ENGINE USING FREQUENCY RESPONSE FUNCTION (FRF) MEASUREMENT Subekti Subekti
SINERGI Vol 22, No 3 (2018)
Publisher : Universitas Mercu Buana

This research was conducted on Diesel engine single cylinder which aims to study the dynamic characteristics of Diesel engine type HATZ 1D 80 made in Germany. The test was performed by measuring the Frequency Response Function (FRF). In this study, the vibration response was measured at three points: point A which was situated below the engine shaft and in line with the stinger. Point A indicated the FRF point. Point B was located in the valve train component, while point C was situated above the cap of the valve train component. The range of frequencies applied was 0 - 3200 Hz, 3200 - 6400 Hz, 6400 - 9600 Hz, and 9600 - 11200 Hz. This research indicates that the natural frequencies arose because of the global vibration mode. The global vibration mode occurred at natural frequencies of 3118, 4805, 4821, 5021, 7129, 8601, and 11107 Hz. While other natural frequencies were associated with the local vibration mode because it appears only at one point of measurement.

Co-Authors Abdillah Fatkhurrokhman Abdul Hamid Abdul Hamid Abdul Hamid Abdul Hamid Abdul Hamid Abdul Hamid Abdul Hamid Agung Dwi Prasetya Agung Dwi Prasetya Agung Wahyudi Biantoro Ahmad Kharis Surnadi Ahmad Zaki Maulana Alim Murwanto Andi Suryadi Ari Susanto Arvian Iswahyudi Basuki Dwi Efendi Basuki Dwi Efendy Basuki Dwi Efendy Basuki Dwi Effendy Darwin Sebayang Dayu Andryas Saputra Dayu Andryas Saputra Deni Arif Rahman deni Dimas Suharto Dimas Suharto Dimas Suharto Doni Revaldo Eko Saputra Eko Saputra Erlangga Yorda Agustin Erlangga Yorda Agustin Fajar Abdul Aziz Fajar Anggara Farezi Andriansyah Gian Villany Golwa Hadi Pranoto Haris Wahyudi Kurtusi Muhamad Monika Audiya Pratiwi Muhamad Fadhil Faali Muhamad Fadhil Faali Muhammad Ikhsan Muhammad Noor Al-Fauzan Syahputra Muhammad Nurul Hidayat Muhammad Nurul Hidayat Muhammad Nurul Hidayat Naufal Waliy Ishlah Naufal Waliy Ishlah Naufal Waliy Ishlah Nur Indah Nur Indah Nur Indah Nur Indah Nur Indah Panca Purwanto Prasetio Aji Nugroho R. Ariosuko Rio Duzan Octavianto Rita Sundari Salvatore Johanes Rega Salvatore Johanes Rega Salvatore Johanes Rega Setyo Qomarudin Yusuf Suryawan Wicaksono Tri Haryono Triwahyudin Rohman Triwahyudin Rohman Triwahyudin Rohman Tulus Supriyanto Usman Rosid Mashuri Yusuf Nugroho

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