Sujarwanto, Tri (2014) Karakterisasi Panel Penyerap Bunyi Untuk Mereduksi Kebisingan Di Dalam Kabin Masinis Lokomotif Cc201. Undergraduate thesis, Institut Teknologi Sepuluh Nopember Surabaya.
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Abstract
Telah dilakukan karakterisasi panel absorber dan
pengamatan terhadap tingkat kebisingan di dalam kabin masinis
pada lokomotif CC201 dengan tujuan untuk mengetahui nilai
parameter akustik panel dan untuk mengidentifikasi kebisingan di
dalam kabin masinis. Pengamatan dilakukan dengan beberapa
variasi kondisi lokomotif meliputi nyala mesin, pergerakan kereta,
kondisi sarana insulasi ruang, sistem transmisi mesin, dan
pengaruh pemasangan panel absorber. Panel yang digunakan pada
penelitian dikarakterisasi meliputi nilai koefisien absorbsi bahan,
reduksi bising, selisih tingkat tekanan bunyi, rugi sisipan, dan nilai
rugi transmisi. Dari hasil penelitian, diketahui bahwa kebisingan di
dalam kabin masinis dipengaruhi oleh nyala mesin kereta api yang
dapat menyebabkan peningkatan tingkat kebisingan yang berbeda
pada masing-masing frekuensi berkisar antara 19,4 hingga 35 dBA.
Pergerakan kereta api menyebabkan peningkatan tingkat
kebisingan 1,3 hingga 8,5 dBA yang dipengaruhi oleh kecepatan
kereta api. Jendela dan pintu kabin sebagai sarana insulasi ruang
dapat mereduksi tingkat kebisingan antara 6,3 hingga 14,4 dBA
apabila keduanya dalam kondisi tertutup. Tingkat kebisingan
didalam kabin masinis sebanding dengan sistem transmisi mesin.
Pemasangan panel absorber yang dibuat pada penelitian ini dapat
mereduksi tingkat kebisingan sebesar 0,1 – 3,8 dBA
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The observation has been executed on the noise level
inside the train’s driver cabin of locomotive CC201 to identify the
noise level inside a locomotive cabin along with the factors
affecting it. The observation was done with several locomotive
condition variations, including running engine, train movement,
room facility insulation, engine transmission system, and effect of
the panel absorber installation. The panel for the experiment was
first characterized to find certain panel acoustic perimetre,
including material absorbtion coeffecient, noise reduction, sound
pressure level difference, insertion loss, and transmission loss. The
observation result showed an increasing of noise levels in each
frequency, ranging from 19.4 to 35 dBA, caused by running engine.
Train movement caused the increase of noise level from 1.3 to 8.5
dBA which was affected by the train velocity. Windows and cabin
doors acted as room insulation facility can reduce the noise level
ranging from 6.3 to 14.4 dBA if both were closed. The noise level
inside the train’s driver cabin was proportionate to the engine
transmission system with the highest value at eighth grade. Panel
Absorber Installation was able to reduct the noise between 0.1 to
3.8 dBA
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSFi 620.23 Tri k |
| Uncontrolled Keywords: | Tingkat kebisingan, kabin masinis, panel absorber |
| Subjects: | T Technology > TD Environmental technology. Sanitary engineering > TD892 Noise control |
| Divisions: | Faculty of Mathematics and Science > Physics > 45201-(S1) Undergraduate Thesis |
| Depositing User: | EKO BUDI RAHARJO |
| Date Deposited: | 05 Nov 2020 02:42 |
| Last Modified: | 05 Nov 2020 02:42 |
| URI: | http://repository.its.ac.id/id/eprint/82228 |
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