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- W636604135 abstract "Although noise and techniques for its control follow the same principles in workboats as in larger vessels, some practical differences exist because (i) many workboats are less than 24.4 m in length and are therefore not covered by the guidelines laid down in the 1979 Code of Practice for Noise Levels in Ships, (ii) many workboats are manned for short periods only, and (iii) in a workboat it is not possible to locate the sensitive areas very far from the major noise sources. After a brief discussion on these differences, and on units of noise measurement and noise criteria, some noise-level readings obtained from tugs and fishing vessels, showing the need for noise control measures, are tabulated. The sources and transmission of noise, and various means of controlling noises, both at the design stage and in vessels in service, are then briefly described. The sources considered include engine-room machinery, propellers, and ventilation systems. Among the control measures mentioned are noise-absorbent material (for the engine room), resilient mountings for Diesel engines and for transverse thrusters (some problems associated with resilient mountings for main engines and gearboxes are also mentioned), model tests aimed at reducing propeller-induced pressure fluctuations on the hull (and some possibilities alleviating this problem for ships already in service), and floating floors and other measures for the accommodation spaces. Order from BSRA as No. 54,937." @default.
- W636604135 created "2016-06-24" @default.
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- W636604135 date "1980-11-01" @default.
- W636604135 modified "2023-09-27" @default.
- W636604135 title "NOISE AND VIBRATION CONTROL IN WORKBOATS" @default.
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