Coupled ITM-FEM approach for the assessment of the mitigation efficiency of finite and infinite open trenches and infilled barriers

In order to determine the wave propagation in unbounded media considering the interaction of structures with the soil and thus also their influence on the resulting wave field, an appropriate model is necessary. A efficient approach to account for the infinite extension of the soil by the analytical solutions of the Integral Transform Method (ITM) and for the irregular geometries of the structures by the Finite Element Method (FEM) is presented. The coupled ITM-FEM approach is applied for the assessment of the mitigation efficiency of infinite open or infilled trenches using a computationally profitable 2.5D approach. For spatially limited trenches a complete three dimensional model is used. Amplitude reduction factor and insertion loss are calculated for different combinations of soil and barrier material. The accuracy of the method is shown by comparison to analytical solutions and literature results.     «

In order to determine the wave propagation in unbounded media considering the interaction of structures with the soil and thus also their influence on the resulting wave field, an appropriate model is necessary. A efficient approach to account for the infinite extension of the soil by the analytical solutions of the Integral Transform Method (ITM) and for the irregular geometries of the structures by the Finite Element Method (FEM) is presented. The coupled ITM-FEM approach is applied for the a...     »