the evaluation and control of the trains induced vibrations needs even more attention in the case of underground tracks which passes near to monuments and historical sites. the rail corrugations which occur due to the wheels’ impulse loads during the operation period of underground railway tracks, usually amplify the ground borne noise and vibration. in the current study, the mentioned phenomen...

P This paper presents and validates a new local to global (L2G) FEM approach that can analyze multiple, interactive fracture processes in 2D solids with improved numerical efficiency robustness. The method features: 1) forming problems for individual cracks; 2) parallel solving returning solutions as part of the trial solution iteration. It has been demonstrated analytically (through simple 1D ...

A two-dimensional (2D) diffraction model for the calculation of the diffraction field in 2D space and its applications to terahertz parallel-plate waveguide power splitters are proposed in this paper. Compared with the Huygens-Fresnel principle in three-dimensional (3D) space, the proposed model provides an approximate analytical expression to calculate the diffraction field in 2D space. The di...

The dual-permanent-magnet-excited (DPME) machine employs permanent magnets (PMs) both on the stator and the rotor. It relies on the bi-directional field modulation effect (BFME) to achieve stable electromechanical energy conversion. Therefore, this new type of machine is capable of offering much higher torque capability than its traditional counterparts. This paper is devoted to investigating t...

Electrical Impedance Tomography (EIT) of media with deformable boundaries is very sensitive to electrode movement. This is especially important for EIT images of the thorax, which become distorted with breathing and posture change. Previously, we proposed a reconstruction method for imaging conductivity change and electrode movement based on an indirect perturbation Jacobian calculation, involv...

• Two types of multiscale and monolithic ALE-FEM are developed for the hemodynamic FSI problem that involves aneurysm progression. The heterogeneous method (HMM) seamless (SMM) integrated into ALE-FEM. can predict long-term risk within a short time cardiovascular biological simulations. is numerically validated by 2D example in terms its approximation accuracy. HMM/ALE-FEM applied to AAA patien...

This paper presents a method to perform 2D deformable object tracking using the boundary element method (BEM). BEM, like the finite element method (FEM), is a technique to model an elastic solid. BEM differs from FEM in that only the contour of an object needs to be meshed for BEM, making this method attractive for computer vision problems. For FEM, the interior of the object must be meshed als...

We extend the well-known form closure framework for rigid parts to holding a class of deformable parts. We consider 2D deformable parts modeled as polygons with a triangular FEM mesh and given stiffness matrix that models linear elasticity and the potential energy associated with deformations of the mesh. We define the D-space (deformation-space) of a part E as the C-space of all nodes in the F...