MODAL ANALYSIS OF ELASTIC-VISCOELASTIC COMPOSITE STRUCTURES BASED ON ANSYS SECONDARY DEVELOPMENT

In recent years, elastic-viscoelastic composite structuresare widely utilized in vibration reduction of engineering structure. But existingFE software packages are not designed to deal with the frequency-dependent mechanicalproperties of viscoelastic materials. Therefore, in this work new integralfinite elements are developed and integrate into the ANSYS element bank, and aniteration algorithm is hooked up to the ANSYS. It is shownthat this strategy is pragmatical and convenient. The model updating of the integral finiteelement based on the experimental modal parameters is also carried out.