SVIBOR - Project code: 2-09-331

MINISTRY OF SCIENCE AND TECHNOLOGY

Strossmayerov trg 4, HR - 10000 ZAGREB
tel.: +385 1 459 44 44, fax: +385 1 459 44 69
E-mail: ured@znanost.hr

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Project code: 2-09-331


RESEARCH OF SHIP VIBRATION AND NOISE AND THEIR EFFECTS ON HUMANS


Main researcher: SENJANOVIĆ, IVO (57053)



Assistants
Type of research: applied
Duration from: 03/01/91.

Papers on project (total): 18
Institution name: Brodarski institut, Zagreb (192)
Department/Institute: Special Technologies Department
Address: Av. V. Holjevca 20
City: 10000 - Zagreb, Croatia
Communication
Phone: 385 (0)10 6551 022
Fax: 385 (0)10 6550 947

Summary: Constant increase of onboard vibration and noise as a result the modern shipbuilding development requires a protection system which covers not only humans, but also equipment and ship structure. This research includes the segments logically following in the sequence of long-standing research of a number of specialists in this field. It includes empirical and semiempirical methods of onboard vibration and noise prediction. The initial investigation of the ship screw propeller as one of the most important sources of onboard vibration and noise has been performed. The characteristics of some ship structure elements have been researched in order to optimise vibration and noise reduction methods. Also, the initial investigation of simultaneous effect of vibration and noise on humans has been made.

Keywords: ship vibration, ship noise, semi-empirical prediction method, propeller excitation, model-based prediction, torsinal vibration, propeller noise, sound propagation and radiation, human susceptibility to vibration and noise

Research goals: The aim of the research is to develop a more accurate and reliable ship vibration calculation empirical method based on the measurement data collected and systemised in Brodarski Institute. Investigate, develop and apply an optimal model-based prediction method for propeller induced hull pressure forces. Develop full scale measuring techniques, to obtain model scale-full scale correlation, investigate optimal correlation parameters and establish data base of measuring results. Develop statistical signal processing methods for propeller induced hull pressure signal. Perform model scale and full scale measurements, and investigate relevant parameters of model scale-full scale correlation. Improve the method for the calculation of shafting torsional vibration onboard for all types of radial engines and various shafting-propulsor combinations. Investigate theoretically and experimentally propulsor acoustical characteristics on smaller ships, as well as acoustical characteristics of ship structure in order to define propulsor design requirements and optimise sound protection methods. Investigate multifrequency and multidirectional effect of vibration on humans as well as combined effect of onboard vibration and noise. Investigate structure and passengers shock loading of a free-falling lifeboat. Propose a method for calculating the parameters relevant for the lifeboat designing.


COOPERATION - INSTITUTIONS


  1. Name of institution: FAKULTET STROJARSTVA I BRODOGRADNJE
    Type of institution: University/Faculty
    Type of cooperation: Joint publishing of scientific papers
    City: 10000 - Zagreb, Croatia

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Last update: 10/13/95
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