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Abstract

Damped structures with isolators such as, for example, total vehicles, are analyzed and automatically optimized using a model representing the structure, the model possibly consisting of both rigid and flexible components, together with initial values for isolator design variables, a set of design constraints, and an optimization criterion. Each isolator may have frequency dependent or frequency independent parameters. Excitations may come from a combination of internal and external sources that may be expressed as deterministic or random functions. Finite element modeling is used to determine eigenvectors of flexible finite element components. A total system model is obtained using the rigid component parameters, eigenvectors of flexible components, and spring-damping parameters of isolators. Vibration analysis using the total system model yields system frequency responses and an optimization function. The Method of Feasible Directions is used to produce optimized isolator design variable values based on the optimization function. A graphical user interface assists the user in entering variables, selecting options, and post-processing.

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First Claim