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RISA Constraint Function Technique for Improved Structural Dynamics
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A constraint function approach is presented for finding design changes that remove natural frequencies from undesirable frequency bands for lightly damped structures. The technique requires the ...
Using Padé Approximants and Curve-fitting to Approximate Eigenvalues and Eigenvectors for Large Design Changes
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Our overall goal is to develop software that facilitates the interactive participation of the designer in the optimization process. We are focusing this research on problems which use finite ...
The Dynamic Response of Columns Under Short Duration Axial Loads
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Coupled nonlinear equations of motion in the axial and transverse directions are derived for a column under dynamic end load. Material dissipation is included by employing a Kelvin model for ...
Differentiation of Mass and Stiffness Matrices for High Order Sensitivity Calculations in Finite Element-Based Equilibrium Problems
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Extension of sensitivity methods to include higher order terms depends on the ability to compute higher order derivatives of the mass and stiffness matrices. This paper presents a method based ...