Wave scattering method for dynamic response analysis of structures with stochastic parameters

ABSTRACT

The wave scattering method is presented to analyze dynamic response of frameworks with stochastic parameters. First, with the uncertain physical, geometric, and loading properties in consideration, the stochastic waveguide equations containing the axial, torsional and flexural wave modes are established. Second, the stochastic wave scattering equation and wave translation matrix are derived to obtain the wave modes. Third, the methodology to extract the generalized displacements and forces from stochastic wave modes is proposed. Finally, a cantilever beam, a planar framework, and a space framework have been presented as numerical examples to illustrate the efficiency of the proposed method. It is found that the results obtained by the proposed method with higher computational efficiency show an excellent agreement with those by Monte Carlo simulation method. Furthermore, the influences of stochastic parameters on dynamic response are revealed.

KEYWORDS:

• Dynamic response
• Monte Carlo simulation method
• stochastic structures
• stochastic wave scattering method