Reduced-order model in structural dynamics for high-modal density in the LF range. Applications to automotive vehicle and fuel assemblies.

In this work, we are interested in constructing a small-dimension reduced-order model adapted to this particular case of high modal density in the low-frequency band, for predicting

The medium-frequency band constituted of both global modes and numerous local elastic modes is thus also very sensitive to uncertainties introduced in the com- putational model..

In order to construct a reduced-order model for the low-frequency band, which allows a good approximation of the global displacements to be predicted and then, if needed, to take

Since we want to construct a small-dimension reduced-order computational model which has the capability to predict the nonlinear dynamical responses on the stiff part for which

In this Section, we first summarize the method introduced in [14] which allows a reduced-order computa- tional model to be constructed for structures having a high modal density in

These two objectives are achieved using the method developed in [1]. This method is based on a kinematic reduction of the kinetic energy. Then, this reduced kinetic energy is used

In this paper, we have presented the use of the Fast Marching Method adapted to complex geometry in order to construct the computational model subdomains which are required to

Then the kinematic reduction and the complementary kinetic reduction allows to split the kinetic energy into (1) a reduced kinetic which is used for the construction of the global