PART IV: SUMMARY AND CONCLUSIONS 



100. This design procedure includes statistical methods for determin- 

 ing a design stress in a dolos armor layer. The methods characterize the 

 structural response as a single parameter: the maximum principal tensile 

 stress in each dolos. Using this approach, the dolos shape can be optimized 

 for structural integrity and hydrodynamic stability, and the design can be 

 verified in the physical model. Also, the structural response to the most 

 significant loading mechanisms can be computed separately and the individual 

 statistical distributions combined to yield a design stress distribution. The 

 design stress is computed using this design stress distribution and then com- 

 pared to a fatigue -reduced strength. The iterative optimizing design process 

 can be accomplished using a user-friendly PC-based computer program. 



101. It is shown that unreinforced normal -strength dolosse above 



20 tons are often underdesigned with respect to strength and can tolerate only 

 slight movement and the associated impacts. It is also shown that increasing 

 the dolos waist ratio can add significantly to the unit's strength, while 

 sacrificing little hydrodynamic stability, and that large dolosse over 30 tons 

 require some strengthening scheme. The methods discussed in this paper pro- 

 vide a complete procedure for determining a design stress within a hydro - 

 dynamically stable dolos and can be used as an outline in the design of other 

 slender armor unit shapes. 



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