Suzia, Aldisa Kurnia (2020) Analisa Pengaruh Damping Pada Respon Getaran Sistem Utama Dua DOF (Translasi dan Rotasi) Akibat Pengaruh Peletakan Mekanisme Cantilever Piezoelectric Vibration Absorber (CPVA) Serta Voltase Bangkitan yang Dihasilkan. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Masalah getaran sering ditemukan pada peralatan yang beroperasi, terutama pada mesin industri. Getaran yang berlebihan akan mengakibatkan gangguan pada mesin dapat mengurangi efisiensi serta menyebabkan umur pakai mesin lebih pendek. Terdapat beberapa cara mereduksi getaran berlebih tersebut salah satunya dengan menggunakan komponen pereduksi getaran yaitu Dynamic Vibration Absorber (DVA) yang dipasang pada sistem utama dari suatu mesin yang bergetar. Pemasangan DVA tersebut akan menyerap energi getaran yang berlebih pada sistem utama. Penyerapan energi tersebut dinamakan Energy Harvesting yang dapat diubah menjadi energi listrik dengan menggunakan alat peredam getaran diantaranya cantilever piezoelectric dan electromagnetic. Pada penelitian ini dilakukan normalisasi dari penelitian sebelumnya yang telah dilakukan oleh (Zulfyanti, 2019) dengan menggunakan simulasi script matlab. Dimana pada penelitian tersebut dilakukan normalisasi sistem utama pada arah gerak translasi dengan cara membuat redaman eksitasi dan redaman pada massa utama tanpa penambahan massa CPVA, serta penambahan massa CPVA. Pada penelitian tersebut hanya dianalisa gerak translasi dikarenakan nilai dari konstanta pegas tidak berubah. Selanjutnya, pada penelitian ini juga dilakukan normalisasi, dengan menganalisa sistem utama pada arah gerak translasi dan rotasi yang disebabkan perbedaan nilai konstanta kekakuan pegas masing-masing sisi. Variasi yang digunakan pada penelitian ini adalah variasi redaman eksitasi (Co), variasi redaman sistem utama (ζ_s) dan rasio redaman absorber (ζ_a) pada kondisi underdamped, critical damped, dam overdamped serta variasi peletakan posisi dari CPVA. Dari hasil simulasi yang telah dilakukan, dalam penelitian ini didapatkan hasil respon getaran berupa grafik antara rasio amplitudo dan rasio frekuensi. Pada sistem utama arah gerak translasi dan rotasi didapatkan grafik hasil respon getaran sistem utama akan teredam jika menggunakan redaman eksitasi yaitu C_o=1.8 Ns/m. Respon getaran yang didapat untuk variasi rasio redaman sistem (ζ_s) dan rasio redaman absorber (ζ_a) pada sistem utama 2 DoF, sistem utama dengan penambahan DVA, serta sistem utama dengan penambahan CPVA akan teredam jika diberikan rasio redaman sistem (ζ_s) dan rasio redaman absorber (ζ_a) pada kondisi critical damped dan overdamped. Respon Getaran akibat variasi posisi peletakan DVA dan CPVA pada sistem utama menghasilkan nilai rasio amplitudo terendah dan menghasilkan energi listrik terbesar sebesar 2.05 volt jika DVA dan CPVA diletakkan tepat disumbu putar.
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Vibration problems often found in operating equipment, especially in the machinery industry. Excessive vibration will cause interference with the machine can reduce the efficiency of the engine and cause a shorter lifetime. There are several ways to reduce excessive vibration of one of them by using vibration-reducing components, namely Dynamic Vibration Absorber (DVA) attached to the main system of a machine that vibrates. The installation of the DVA will absorb excess vibration energy in the main system. Absorption is called Energy Harvesting energy that can be converted into electrical energy by using a tool such as a cantilever piezoelectric vibration damping and electromagnetic. In this research, the normalization of previous research that has been done by (Zulfyanti, 2019) using simulation Matlab script. Where the studies were conducted normalization of the main system in the direction of translational motion by making the damping of excitation and damping on the main mass without the addition of CPVA mass, as well as the addition of CPVA mass. In the study analyzed only the translational motion due to the value of the spring constant has not changed. Furthermore, this research also is normalized, by analyzing the main system in the direction of motion of translation and rotation due to differences in spring stiffness constant value each side. Variations were used in this study is the attenuation variation excitation (Co), the variation damping primary system and absorber damping ratio the underdamped condition, critical damped, and overdamped draft position laying variation of CPVA. From the simulation results that have been done, in this study the results obtained in the form of a graph between the vibration response amplitude ratio and frequency ratio. In the main system and the rotation direction of the translational motion graph of the results obtained vibration response will be reduced if the main system uses the excitation C_o=1.8 Ns/m. Vibration response obtained for the variation of damping ratio system (ζ_s) and damping ratio absorber system (ζ_a)in the main system 2 DoF, the main system with the addition of the DVA, as well as the main system with the addition of CPVA be damped if given the damping ratio system (ζ_s) and damping ratio of absorber systems (ζ_a ) in critical condition damped and overdamped. Vibration response due to variations in DVA and CPVA laying position on the main system produces the lowest amplitude ratio value and generate the largest electric power by 2.05 volt if DVA and swivel CPVA put right.
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | RSM 620.3 Suz a-1 2020 |
| Uncontrolled Keywords: | Respon Getaran, Dynamic Vibration Absorber, Cantilever Piezoelectric Vibration Absorber, Rasio Amplitudo, Rasio Frekuensi, Rasio Redaman |
| Subjects: | Q Science > QA Mathematics > QA935 Vibration |
| Divisions: | Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis |
| Depositing User: | Suzia Aldisa Kurnia |
| Date Deposited: | 05 Mar 2025 01:55 |
| Last Modified: | 05 Mar 2025 01:55 |
| URI: | http://repository.its.ac.id/id/eprint/73154 |
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