The U.S. Navy has officially announced that the Navy has decided to use traditional metal materials instead of composite materials to rebuild the aging cruiser superstructure, because the use of metal materials is more economical in the long run.
The Navy admits that every ** cruiser had repaired cracks. Although these vessels use steel hulls, aluminum alloys have been used in superstructures exposed to the high temperatures and other environmental factors of ship exhaust systems. The most serious problem of cracking occurred in the construction of the last few ships. It seems that the aluminum alloy cannot fully meet the requirements of these ships.
According to Scott Haier, deputy manager of the Naval Maritime Systems Command's project responsible for active surface ships, the Navy has studied the use of composite materials instead of aluminum alloys to build superstructures, but the cost is very high. "The problem now is how to solve the cracking of the aluminum alloy structure." Haier said, "If the Navy has enough funds to replace composite materials, we will consider replacing it." At present, the Navy has to adopt a "tailor-made" method to solve Cruiser aluminum alloy material cracking problem.
The Navy uses long-term cost calculation as the basis for analysis, but what is the basis for the basis? Composite superstructures will undoubtedly be cheaper than metal material superstructures in terms of maintenance costs and life cycle costs of ships. There is no corrosion problem in composite superstructures, and less maintenance is required overall.
It is unclear how much maintenance work has been reduced, and the Navy has only acquired relatively little experience from the use of composite masts for the “San Antonio†class amphibious transport ship (LPD-17). The “Jumwalt†class destroyer (DDG-1000) is the only ship that plans to use a composite keel for cruisers. The entire deck cabin will be built with advanced materials.
The spacious and impressive deck cabin of the "Jumwalt" class destroyer consists of several composite beams and joints. After the ship is deployed, it will provide the Navy with relevant data to determine the total life savings and overall benefits from the use of composite materials.
Due to the lack of relevant data, the navy's practice of reusing aluminum alloy superstructures on cruisers is hardly economical in the long run. Although the upfront cost of using composite superstructures is relatively high, the Navy’s new strategy is to prioritize the cost of the entire life of the ship. From the next few decades, the Navy’s decision to abandon composite materials seems to be short-sighted.
The Navy admits that every ** cruiser had repaired cracks. Although these vessels use steel hulls, aluminum alloys have been used in superstructures exposed to the high temperatures and other environmental factors of ship exhaust systems. The most serious problem of cracking occurred in the construction of the last few ships. It seems that the aluminum alloy cannot fully meet the requirements of these ships.
According to Scott Haier, deputy manager of the Naval Maritime Systems Command's project responsible for active surface ships, the Navy has studied the use of composite materials instead of aluminum alloys to build superstructures, but the cost is very high. "The problem now is how to solve the cracking of the aluminum alloy structure." Haier said, "If the Navy has enough funds to replace composite materials, we will consider replacing it." At present, the Navy has to adopt a "tailor-made" method to solve Cruiser aluminum alloy material cracking problem.
The Navy uses long-term cost calculation as the basis for analysis, but what is the basis for the basis? Composite superstructures will undoubtedly be cheaper than metal material superstructures in terms of maintenance costs and life cycle costs of ships. There is no corrosion problem in composite superstructures, and less maintenance is required overall.
It is unclear how much maintenance work has been reduced, and the Navy has only acquired relatively little experience from the use of composite masts for the “San Antonio†class amphibious transport ship (LPD-17). The “Jumwalt†class destroyer (DDG-1000) is the only ship that plans to use a composite keel for cruisers. The entire deck cabin will be built with advanced materials.
The spacious and impressive deck cabin of the "Jumwalt" class destroyer consists of several composite beams and joints. After the ship is deployed, it will provide the Navy with relevant data to determine the total life savings and overall benefits from the use of composite materials.
Due to the lack of relevant data, the navy's practice of reusing aluminum alloy superstructures on cruisers is hardly economical in the long run. Although the upfront cost of using composite superstructures is relatively high, the Navy’s new strategy is to prioritize the cost of the entire life of the ship. From the next few decades, the Navy’s decision to abandon composite materials seems to be short-sighted.
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