Design Report Guided Missile Submarine SSG(X) - AOE - Virginia ...
Design Report Guided Missile Submarine SSG(X) - AOE - Virginia ...
Design Report Guided Missile Submarine SSG(X) - AOE - Virginia ...
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<strong>SSG</strong>(X) <strong>Design</strong> – VT Team 3 Page 65<br />
Figure 54 - Pressure Hull Model in MAESTRO<br />
Once the geometry and composition of the structure is determined using the optimized results from<br />
ModelCenter, the loads are placed on the structure. The MAESTRO Solver analyzes the structure to determine<br />
adequacy. If inadequate structure is found, the structural model is modified by adjusting the plating thickness or<br />
frame scantlings. The iterative process of defining the structure, determining structural adequacy, and adjusting the<br />
scantlings is outlined in Figure 55.<br />
Geometry<br />
Components /<br />
Materials<br />
Loads<br />
Stresses<br />
4.4.1 Geometry, Components and Materials<br />
Scantling Iteration<br />
Modes of<br />
Failure<br />
Figure 55 - Iterative Structural <strong>Design</strong> Process in MAESTRO<br />
Strength<br />
In the case of a non-nuclear submarine which has more outboard volume, external frames allow more<br />
arrangeable area within the pressure hull. These external frames can run through tanks which are enclosed by<br />
transverse outboard bulkheads; however, along the portion of the pressure hull which has outboard cylindrical<br />
hydride tanks, internal frames must be employed.<br />
It is desirable to isolate portions of the submarine which contain potential flood or fire hazards. The machinery<br />
room is considered both a fire and flood hazard; therefore, a watertight bulkhead forward is placed forward of the<br />
machinery room. The torpedo room is also considered a potential flood hazard; therefore, a watertight bulkhead is<br />
placed aft of the torpedo room. A general structural rule for bulkhead placements suggests a bulkhead or king frame