ANALISIS NUMERIKAL FREKUENSI NATURAL PADA POROS LOW PRESSURE BOILER FEED PUMP PT.PJB UP GRESIK

OFRIAL, MUHAMMAD TAUFIK AKBAR (2017) ANALISIS NUMERIKAL FREKUENSI NATURAL PADA POROS LOW PRESSURE BOILER FEED PUMP PT.PJB UP GRESIK. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Low pressure boiler feed pump (LPBFP) merupakan salah satu komponen penting dalam sistem Heat Recovery Steam Generator (HRSG), pada pengoperasiannya sering terjadi permasalahan yaitu patahnya poros yang dapat terjadi 8-10 kali dalam setahun yang mungkin disebabkan oleh faktor getaran. Untuk itu pada penelitian ini dilakukan perhitungan dengan pemodelan metode elemen hingga menggunakan software ANSYS untuk menghitung frekuensi natural dan modus getaran untuk 10 frekuensi natural pertama pada komponen LPBFP. Dari hasil simulasi didapatkan nilai yaitu untuk orde pertama sebesar 583.03 Hz, orde kedua sebesar 583.39 Hz, orde ketiga sebesar 2820.8 Hz, orde keempat sebesar 2849 Hz, orde kelima sebesar 3943.9 Hz, orde keenam sebesar 4079.6 Hz, orde ketujuh sebesar 5428.3 Hz, orde kedelapan sebesar 6111 Hz, orde kesembilan sebesar 6594 Hz, orde kesepuluh sebesar 6715 Hz. Sepuluh frekuensi natural menghasilkan lima jenis modus getaran yaitu lateral bending vibration, shear bending vibration, torsional bending vibration, axial bending vibration, torsional shear bending vibration. Dari kesepuluh frekuensi natural yang diperoleh semuanya menyebabkan kegagalan poros low pressure boiler feed pump. ================================================================================= Low pressure boiler feed pump (LPBFP) is imporatant
equipment in Heat Recovery Steam Generator (HRSG)’s system.
The operation often occurred failure. One of them is a shaft
breakage that can occur 8-10 times per year which may be caused
by vibration factors. Finite Element Method is applied to calculate
natural frequency and mode shapes at the first of 10th natural
frequency. The results of the simulation are first orde is 583.03 Hz, second orde is 583.39 Hz, third orde is 2820.8 Hz, fourth orde is 2849 Hz, fifth orde is 3943. Hz, sixth orde is 4079.6 Hz, seventh orde is 5428.3 Hz, eighth orde is 6111 Hz, nineth orde is 6594 Hz, tenth orde is 6715 Hz. Ten natural frequencies generate five types of mode shape, first mode shape is lateral bending vibration, second is shear bending vibration, third is torsional bending vibration, fourth is axial bending vibration, fifth is torsional shear bending vibration. The all of natural frequency cause failure of the shaft low pressure boiler feed pump

Item Type:	Thesis (Undergraduate)
Additional Information:	RTS 625.794 Ofr a
Uncontrolled Keywords:	Pompa, Poros, Analisis Vibrasi, Modus Getaran, Pump, Shaft, Vibration Analysis, Mode Shape
Subjects:	T Technology > TN Mining engineering. Metallurgy T Technology > TS Manufactures > TS253 Die-Casting
Divisions:	Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Ofrial Muhammad Taufik Akbar
Date Deposited:	12 Jan 2017 07:29
Last Modified:	12 Jan 2017 07:29
URI:	http://repository.its.ac.id/id/eprint/1432

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