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Chapter One APPLICATIONS The Swedish and Italian Navies have been building minesweeping operations (MSO) ships with composite technology for many years. TShweedish Navy, in conjunction with thReoyal Australian Navy and the U.S. Navy, studied shock loadidnugrsing the development of the Swedish composite MSO. Shock loadings (mine explosion simulations) were performed on panels to study candidate FRP materials and configurations such as: • Shapes and different height/width ratio of fram; es • Epoxy frame;s • Sprayed-up laminate; s • Corrugated laminate; s • Sandwich with different core densities and thickne;sses • Different types of repair;s • Weight brackets and penetrations on pa;nels • Adhesion of fire protection coatings in sho; ck • The effect of double curved surfac; easnd • Reduced scale panel with bolted and unbolted fra. mes This extensive testing program demonstrated that a frameless Glass Reinforced Plastic (GRP) sandwich design utilizing a rigid PVC foam core material was superior in shock loading and resulted in better craft and crew survivability. The Swedish shock testing program demonstrates that when properly designed, composite materials can withstand and dampen large shock loads. [1- 34] Table 1-5 summarizes the current use of FRP for mine counter measure vAesltsheolusg. h design and performance issues associated with sandwich construction for minehuntershave been demonstrated, most recent new orders for minehunters worldwide are for thick-sectioned, single-skin construction. Swiftships of Morgan City, LA is primarily a yard that builds in aluminum and steel. A contract with the Egyptian Navy created the opportunity for this yard to get involved with composite construction. Three of these 100-foot vessels, shown at right, have been delivered. Swiftship’s Program Engineer largely credits the resources and research work of the U.S. Navy with making the transition to composite construction possible for this medium-sized yard. Figure 1-30 ships 33.5m CMH [June, 94, WARSHIP TECH] 33 Profile and Equipment Layout of the Swift-PDF Image | Marine Componsites
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