in this paper the interior noise level of a vehicle due to structural vibration, named structure borne noise, as a part of nvh analysis has been investigated. first structural analysis is performed and vibrational behavior of structure carried out due to power plant excitations. then interior acoustic cavity response for such excitation and resultant noise is determined. vibrational analysis is...

efficient mode shape extraction of fluid-structure systems is of particular interest in engineering. an efficient modified version of unsymmetric lanczos method is proposed in this paper. the original unsymmetric lanczos method was applied to general form of unsymmetric matrices, while the proposed method is developed particularly for the fluid-structure matrices. the method provides us with si...

In the vibroacoustic studies of coupled fluid-structure systems treated by finite element method, reducing the size of the problem is important because we must add all the degrees of freedom of the fluid domain to those of the structure. We propose a modal synthesis method for solving this type of problem, coupling dynamic substructure of Craig and Bampton type and acoustic subdomain based on a...

Accurate, robust and efficient multiphysics-methods for the simulation of three-dimensional complex problems with immersed boundaries from engineering as well as biophysics are a highly interesting and challenging research area. Within this context, our motivation was to develop a general framework to solve a variety of multiphysics problem classes such as fluid-structure interaction (FSI) [1]-...

Numerical difficulties are present in the particle finite element method even though it has been shown to be a powerful and effective approach to simulating fluid-structure interaction. To overcome problems of mass loss on the free surface and the added-mass effect, an improved fractional step method (FSM) that handles addedmass terms in a mathematically exact way is developed. A further benefi...