Evolutionary natural frequency optimization of two-dimensional structures with additional non-structural lumped masses.

Extends the evolutionary structural optimization method to the solution for the natural frequency optimization of a two-dimensional structure with additional non-structural lumped masses. Owing to the significant difference between a static optimization problem and a structural natural frequency optimization problem, five basic criteria for the evolutionary natural frequency optimization have been established. The inclusion of these criteria into the evolutionary structural optimization method makes it possible to solve structural natural frequency optimization problems for two-dimensional structures with additional non-structural lumped masses. Gives two examples to demonstrate the feasibility of the extended evolutionary structural optimization method when it is used to solve structural natural frequency optimization problems. [ABSTRACT FROM AUTHOR]