The subject of random vibration arises from the need to relate the response of a structure to an excitation which — by its nature — is not amenable to precise description. The designer of an aircraft, for example, must take account of the stresses which arise from runway roughness or air turbulence, although the imposed displacements or pressures vary with time in a manner which defies analytical description, and which indeed cannot even be known until the aircraft goes into service. Such problems arise in many forms in all branches of engineering, and orthodox vibration analysis gives no help in their solution. New techniques and concepts are required if such random ly varying excitations are to be treated.
KeywordsRandom Vibration Random Excitation Essential Idea Theory Includ Response Determination
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Bibliography for Chapter 1
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