Author: | Wong, Kin-yan |
Title: | Hydraulic breaker : noise impact and control |
Degree: | M.Sc. |
Year: | 1994 |
Subject: | Noise control Construction equipment -- Noise Hydraulic machinery Wrecking -- Noise Hong Kong Polytechnic -- Dissertations |
Department: | Multi-disciplinary Studies |
Pages: | 201 leaves : ill. ; 30 cm |
Language: | English |
Abstract: | The study on the noise control of hydraulic hammer was by the close-fit enclosure technique , and emphasis on the characteristic of middle to high frequency range created by the hydraulic breaker. A laboratory model was set up to simulate the performance of a hydraulic breaker and to identify qualitative factors which affected the performance of an hydraulic breaker enclosure. Enclosures made with plywood and damped steel plate were test under different conditions. The performance parameters of laboratory models were deduced and comparied with measurements. After the laboratory tests, a prototype of a plywood enclosure was made on site and tested under site conditions. Site measurements of the noise created by hydraulic breaker were taken at two demolition sites. Results were analysised and compared with the laboratory model. The study revealed that the noise reduction on hydraulic breaker by the close-fit enclosure technique was feasible. |
Rights: | All rights reserved |
Access: | restricted access |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
b11830037.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 6.85 MB | Adobe PDF | View/Open |
Copyright Undertaking
As a bona fide Library user, I declare that:
- I will abide by the rules and legal ordinances governing copyright regarding the use of the Database.
- I will use the Database for the purpose of my research or private study only and not for circulation or further reproduction or any other purpose.
- I agree to indemnify and hold the University harmless from and against any loss, damage, cost, liability or expenses arising from copyright infringement or unauthorized usage.
By downloading any item(s) listed above, you acknowledge that you have read and understood the copyright undertaking as stated above, and agree to be bound by all of its terms.
Please use this identifier to cite or link to this item:
https://theses.lib.polyu.edu.hk/handle/200/3530