Prabawati, Hilda Yunita (2016) Pemodelan Dan Analisis Pengaruh Perubahan Parameter Pada Sistem Torsional Vibration Absorber Terhadap Torsi Redam Dan Respon Dinamis Dari Sistem Penggerak Drivetrain Pada Mobil Dengan Kapasitas Engine 1200 CC. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Perkembangan dunia otomotif sekarang semakin berkembang, seperti halnya pada mobil. Mobil memiliki beberapa komponen berputar salah satunya sistem penggerak drivetrain. Komponen ini akan menghasilkan getaran torsional yang disebabkan putaran poros dan perubahan kecepatan secara tiba-tiba. Efek dari getaran tersebut akan menimbulkan kebisingan dan kerusakan yang lebih cepat pada komponen tersebut. Maka dari itu dibutuhkan Torsional Vibration Absorber. Torsional Vibration Absorber adalah piringan dengan pegas yang dapat meredam getaran yang terjadi dengan memanfaatkan momen inersia dan koefisien redam torsional. Dalam tugas akhir ini dilakukan pemodelan dan analisis pengaruh perubahan momen inersia, koefisien redam torsional dan frekuensi sistem Torsional Vibration Absorber terhadap torsi redam dan respon dinamis terhadap sistem penggerak drivetrain dengan variasi konstanta pegas torsional. Pada sistem Torsional Vibration Absorber momen inersia divariasikan sebesar 0,1575 – 0,1425 kg.m2, koefisien redam torsional divariasikan 6,2 – 28,6 N.m.s/rad serta konstanta pegas torsional divariasikan sebesar 7893,6 – 7104,24 N.m/rad. Input yang digunakan pada tugas akhir ini adalah input sinusoidal dengan variasi frekuensi 2 - 8 Hz dan bump modified. Tahap awal penelitian ini dilakukan pemodelan dan simulasi sistem Torsional Vibration Absorber dengan input sinusoidal dengan variasi momen inersia dan koefisien redam torsional, didapatkan bahwa semakin besar momen inersia dan koefisien redam torsional maka akan semakin besar torsi redam yang dihasilkan. Parameter sistem Torsional Vibration Absorber yang dipilih adalah momen inersia 0,1575 kg.m2 dan koefisien redam torsional 28,6 N.m.s/rad. Penelitian selanjutnya dilakukan penambahan sistem Torsional Vibration Absorber pada sistem penggerak drivetrain, digunakan input bump modified. Dengan divariasikannya konstanta pegas torsional, didapatkan bahwa semakin kecil konstanta pegas torsional maka respon transient sistem akan semakin cepat sehingga cepat mencapai kondisi steady state. Dan dari perbandingan sistem penggerak drivetrain dengan dan tanpa penambahan sistem Torsional Vibration Absorber, didapatkan hasil bahwa penambahan sistem Torsional Vibration Absorber membuat getaran lebih teredam, dibuktikan dengan respon transien yang mengakibatkan pencapaian kondisi steady state terjadi 20 – 70 % lebih cepat dan besar nilai maksimum perpindahan, kecepatan dan percepatan 38 – 91 % lebih kecil. =================================================================================== The development of the automotive is now growing, as happened in the car. The car has several rotating components, one of them is drivetrain. This component will generate torsional vibration caused by the shaft rotation and sudden speed changes. The effects of vibration will cause noise and make these components damage faster. Therefore it takes Torsional Vibration Absorber. Torsional Vibration Absorber is a disc with a spring that can dampen vibration that occurs by utilizing the moment of inertia and torsional damping coefficient. In this research, modeling and analysis of the effect of changes in the moment of inertia, torsional damping coefficient and frequency of Torsional Vibration Absorber system towards damping torque and dynamic response of the drivetrain with the variety of torsional spring constant. In Torsional Vibration Absorber, the moment of inertia was varied from 0.1575 to 0.1425 kg.m2, torsional damping coefficient was varied from 6.2 to 28.6 Nms/rad and the torsional spring constant was varied from 7893.6 to 7104.24 Nm/rad. Inputs used in this thesis is a sinusoidal input which frequency was varied from 2 to 8 Hz and bump modified input. The first step of this research, modeling and simulation Torsional Vibration Absorber system using sinusoidal input with the moment of inertia and torsional damping coefficient was varied, from this simulation has been known that the greater the moment of inertia and torsional damping coefficient, the greater the damping torque generated. The parameters of Torsional Vibration Absorber system selected is 0.1575 kg.m2 in moment of inertia and 28.6 Nms/rad in torsional damping coefficient. The next step was the addition of Torsional Vibration Absorber system on the drivetrain system, using bump modified input. With the variation of torsional spring constant, it has been known that the smaller the torsional spring constant, the transient response of the system will reach steady state conditions faster. And from the comparison of drivetrain system, with and without the addition of Torsional Vibration Absorber system, showed that the addition of Torsional Vibration Absorber system create more vibration damped, shown by the transient response which reached the steady state conditions about 20-70% faster and the maximum value of displacement, velocity and acceleration is about 38-91% smaller.
| Item Type: | Thesis (Undergraduate) |
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| Additional Information: | RSM 629.243 Pra a |
| Uncontrolled Keywords: | Torsional Vibration Absorber; Flywheel; karakteristik gaya redam; respon dinamis pada drivetrain; parameter sistem penambahan Torsional Vibration Absorber pada drivetrain; damping torque characteristics; dynamic response of drivetrain; system pamameter of addition of Torsional Vibration Absorber on drivetrain |
| Subjects: | T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis |
| Depositing User: | Mrs Anis Wulandari |
| Date Deposited: | 24 May 2017 03:02 |
| Last Modified: | 27 Dec 2018 04:13 |
| URI: | https://repository.its.ac.id/id/eprint/41363 |
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