Design of Hazardous Mechanical Structures, Systems and Components for Extreme Loads
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Extreme loads applied to mechanical SSC often involve time-dependent structure fluid interaction. Over the past 5 to 10 years enormous strides have been made in the ability to more accurately define these loads in the design of mechanical components. Primarily due to the strides made in the development of finite-element and difference algorithms and resultant computer programs, these loads particularly associated with system transient time-dependent loads at charges in directions and areas can be determined with an accuracy not previously achieved. To date these analyses have generally been restricted to elastic or linear response systems. However, it is expected that they will rapidly become available for inelastic nonliner system analysis more characteristic of mechanical systems at or near failure.
Unfortunately, these new analytical techniques tend to be relatively expensive both with respect to the cost of the computer software and the cost of inputting and evaluating the output results. In addition, it tends to be difficult to evaluate the validity of the results. This chapter provides approximate first-order load definitions for various types of extreme loads typically applicable to mechanical SSC. These design inputs may be used where more exact solutions are not required, or can be used to independently verify more exact solutions.