APPENDIX 3 Recommended Research 



Areas by Field Reference 

 Number 



(Asterisk denotes high priority) 



Field Reference 01 



SHIP DESIGN - STRUCTURAL AND STRESS ANALYSIS 



The response of structures to static and dynamic loads is considered in this 

 section. Both static and dynamic behaviour is of concern especially where non- 

 traditional materials are considered, for example, ferro-concrete. The methods of 

 obtaining dynamic responses are of interest, where new techniques are being 

 applied, such as the use of finite elements in propeller blade vibration calculations 

 and in ship vibration calculations where the ship is treated as a three-dimensional 

 stiffened plate structure instead of the usually assumed beam simplification. 



A better understanding of fatigue and crack propagation as experienced by ship 

 structures is required to provide information for efficient and safe detail design. 



Methods of analysing and designing 'open-deck' ships for torsional loads are 

 required, and these should take into account variation of cross-sectional properties 

 along the length of the ship. 



The response of ships' structures to impulsive loading is of concern from the point 

 of view of preventing damage locally and also from the point of view of transmission 

 of periodic forces which may cause unacceptable forced and resonant vibrations. 



Recommended Topics 



The design of a ferro-cement, pre-stressed concrete hull with technical and econ- 

 omic considerations taken into account. 



The application of finite element techniques to the calculation of vibration 

 responses of ships' hulls. 



The assessment of the vibration characteristics of large marine propellers. 



The assessment of structural response to impulsive loading. 



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