Studi Eksperimen Analisis Reduksi Respons Getaran dengan Menggunakan Semi-Active Tuned Mass Damper pada High Pressure Circulation Pump

Danaputra, Faiz Imawan (2026) Studi Eksperimen Analisis Reduksi Respons Getaran dengan Menggunakan Semi-Active Tuned Mass Damper pada High Pressure Circulation Pump. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Keandalan unit pembangkit listrik merupakan aspek penting dalam proses bisnis ketenagalistrikan, salah satunya dipengaruhi oleh performa peralatan pendukung seperti pompa. Pada Unit Pembangkitan Muara Karang Blok 1, high pressure circulation pump dalam sistem heat recovery steam generator (HRSG) berpotensi menghasilkan getaran berlebih. Salah satu upaya untuk mereduksinya adalah implementasi semi-active tuned mass damper (TMD) berbasis fluida magnetorheological. Untuk memaksimalkan reduksi, maka dilakukan penelitian untuk mengetahui pengaruh frekuensi natural dan koefisien redaman TMD. Penelitian ini dilakukan dengan perancangan, fabrikasi, dan implementasi semi-active TMD secara langsung pada high pressure circulation pump yang beroperasi dengan kondisi aktual. Data getaran diukur menggunakan vibration analyzer pada kondisi sebelum dan sesudah pemasangan semi-active TMD dengan tujuh variasi supply arus listrik konstan pada rentang 1,6 A hingga 2,6 A. Variasi pengujian bertujuan untuk menentukan kondisi reduksi amplitudo getaran optimal. Hasil pengujian eksperimental selanjutnya divalidasi menggunakan simulasi numerik untuk memastikan kesesuaian karakteristik dinamis sistem secara teoritis. Hasil pengujian menunjukkan frekuensi dominan getaran pompa sebesar 173,91 Hz dengan overall velocity arah vertikal awal sebesar 3,36 mm/s. Reduksi getaran tidak meningkat linier terhadap penambahan arus, melainkan mencapai performa optimum pada rentang arus 2,1-2,27 A. Arus 2,1 A dipilih sebagai arus optimum karena performanya hampir setara dengan 2,27 A pada domain frekuensi, namun jauh lebih unggul dan konsisten pada domain waktu (RMS acceleration), sebelum performa menurun pada arus lebih tinggi akibat indikasi saturasi magnetik fluida magnetorheological. Pada arus tersebut, semi-active TMD mereduksi overall velocity menjadi 2,80 mm/s yang ekuivalen dengan reduksi 16,53%, tervalidasi oleh simulasi numerik dengan reduksi RMS velocity 15,98% dan error 3,31%. Penerapan semi-active TMD ini memperbaiki klasifikasi tingkat keparahan getaran pompa dari Zona C menuju Zona B berdasarkan ISO 10816-3.
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The reliability of a power generation unit is an important aspect in supporting the electricity business process, partly determined by the performance of equipment such as pumps. At the Muara Karang Generation Unit Block 1, the high pressure circulation pump in heat recovery steam generator (HRSG) system, has the potential to produce excess vibration energy. One approach to reduce excess vibration is to implement a semi-active tuned mass damper (TMD) based on magnetorheological fluid. To optimize the reduction, a research was conducted by determining the effect of the natural frequency and damping coefficient of the TMD. This research was conducted by designing, fabricating, and directly implementing the semi-active TMD on a high pressure circulation pump operating under actual conditions. Vibration data was measured using a vibration analyzer before and after the installation of the semi-active TMD, with seven constant current supply variations ranging from 1,6 A to 2,6 A. The test variations were conducted to determine the optimum condition for vibration amplitude reduction. The experimental test results were further validated using numerical simulation to ensure the theoretical consistency of the system’s dynamic characteristics. Experimental results indicated a dominant pump vibration frequency of 173,91 Hz, with an initial vertical overall velocity of 3,36 mm/s/. Vibration reduction was found to be nonlinear with respect to the applied current, reaching optimum performance at 2,1-2,27 A. A current of 2,1 A was selected as optimal, given its near-equivalent performance to 2,27 A in the frequency domain, while demonstrating markedly superior and more consistent performance in the time domain (RMS acceleration), before declining at higher currents due to magnetic saturation in the magnetorheological fluid. At this optimum current, the semi-active TMD reduced the overall velocity to 2,80 mm/s, equivalent to a 16,53% reduction, a result validated through numerical simulation showing a 15,98% RMS velocity reduction with a 3,31% error. This implementation improved the pump’s vibration severity classification from Zone C to Zone B in accordance with ISO 10816-3.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	semi-active tuned mass damper, getaran, high pressure circulation pump, heat recovery steam generator, magnetorheological, vibration
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA355 Vibration. T Technology > TJ Mechanical engineering and machinery > TJ919 Centrifugal pumps--Design and construction.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21101-(S2) Master Thesis
Depositing User:	Faiz Imawan Danaputra
Date Deposited:	30 Jul 2026 08:51
Last Modified:	30 Jul 2026 08:51
URI:	http://repository.its.ac.id/id/eprint/140060

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