Studi Pengaruh Penambahan Dual Dynamic Vibration Absorber (DVA)-Dependent Terhadap Respon Getaran Translasi Dan Rotasi Pada Sistem Utama 2-DOF

Machfuroh, Talifatim (2016) Studi Pengaruh Penambahan Dual Dynamic Vibration Absorber (DVA)-Dependent Terhadap Respon Getaran Translasi Dan Rotasi Pada Sistem Utama 2-DOF. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Sebuah sistem dapat mengalami getaran yang berlebihan jika gaya yang bekerja padanya mendekati frekuensi natural dari sistem tersebut. Pada beberapa kasus, getaran pada sebuah sistem dapat dikurangi dengan memasangkan dynamic vibration absorber (DVA). Dynamic vibration absorber (DVA) merupakan sistem massa, damper, dan pegas yang ditambahkan pada sistem utama. Jenis peredam ini akan bergerak bersamaan dengan sistem utama sehingga getaran pada sistem utama dapat diredam. Salah satu modifikasi DVA adalah penggunaan dual DVAdependent pada sistem utama. Dual DVA-dependent merupakan dua buah DVA menyatu yang dipasang pada sistem utama dengan jarak tertentu. Pada penelitian ini dipelajari pengaruh penambahan dual DVA-dependent terhadap respon getaran translasi dan rotasi pada sistem utama 2-DOF. Dalam pemahaman mengenai fenomena tersebut dibuat model dinamis sistem tanpa penambahan DVA dan sistem dengan penambahan DVA. Model dinamis sistem tanpa penambahan DVA digunakan sebagai pembanding terhadap sistem dengan penambahan DVA. Model dinamis tersebut disimulasikan dengan software Simulink Matlab. Pada model sistem dengan penambahan DVA, rasio konstanta kekakuan DVA terhadap sistem yang digunakan sebesar 1/20 dan rasio massa DVA terhadap sistem 1/10 dengan variasi rasio inersia massa DVA terhadap sistem 1/40; 1/20; dan 1/10 dan variasi rasio jarak kantilever absorber 1/3; 1/2; dan 1. Dari hasil penelitian didapatkan bahwa penempatan cantilever absorber DDVA-dependent pada ujung system dengan rasio inersia massa absorber 1/10 mampu mereduksi getaran system utama dengan prosentase pengurangan pada frekuensi 12,78 Hz sebesar 94,1681 % untuk arah translasi dan 15,3878 % untuk arah rotasi. Perubahan rasio jarak dan rasio inersia massa absorber tidak mempengaruhi kemampuan DDVA-dependent dalam mengurangi getaran arah translasi. Kemampuan DDVA-independent sama dengan DDVA-dependent dalam mereduksi getaran arah translasi dan lebih baik daripada DDVA-dependent dalam mereduksi getaran arah rotasi dengan prosentase pengurangan sebesar 80,3252% pada frekuensi 12,78 Hz untuk ================================================================================================================== A system can be subjected to excessive vibration if the force acting on it approaching the natural frequency of the system. To overcome, the traditional treatment method that involves structural modifications often take some time and expensive. In some cases, a vibration in a system can be reduced by installing dynamic vibration absorber (DVA). Dynamic Vibration Absorber (DVA) is a mass, damper, and spring system which is added to the main system. This kind of absorber will move together with the main system to reduce the vibration of the main system. In order to reduce the vibration, modification of DVA is required. One modification is the using of dual DVAs-dependent in the main system. Dual DVAs-dependent are two fused DVA which are mounted on the main system at a certain distance.In this research, it is studied about the effect of the addition dual DVA-dependent in the translational and rotational vibration response at the 2- DOF primary system. In the understanding of this phenomenon, it is created a dynamic model of the system without the addition of DVA and system with the addition dual DVA-dependent. A dynamic model of the system without the addition DVA is used as a comparison against the system with the addition of DVA. The dynamic model is simulated with Matlab Simulink software. In the model system with the addition of the DVA, the ratio of stiffness DVA to the system is 1/20 mass ratio is 1/10 with variations of inertia ratio DVA to system are 1/40, 1/20, and 1/10 and variations of distance ratio of absorber cantilever are 1/3, 1/2, and 1.The result of this studied showed that the cantilever absorber placement of DDVAs-dependent at the end of the system with mass inertia absorber ratio of 1/10 can reduce the vibration of primary system which reduced with a 94.1681% for translation direction and 15.3878% for rotation direction in the frequency of 12.78 Hz. The changes of distance ratio and inertial mass absorber ratio have no effect on the ability of DDVAs-dependent to reduce vibration of translational direction. The capabilities of DDVAs-independent are same with DDVA-dependent in reducing vibration of translational direction and its better than DDVA-dependent in reducing vibration of rotational direction with the percentage of reducing is 80.3252% in the frequency 12.78 Hz on rL = 1

Item Type: Thesis (Masters)
Additional Information: RTM 629.243 Mac s
Uncontrolled Keywords: pemodelan dinamis, dual DVA-dependent, peredam getaran
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Industrial Technology > Mechanical Engineering > (S2) Master Theses
Depositing User: Users 13 not found.
Date Deposited: 06 Jul 2017 03:33
Last Modified: 06 Jul 2017 03:33
URI: http://repository.its.ac.id/id/eprint/41889

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