Sentence examples for modal data such from inspiring English sources

Different algorithms have recently been developed for the diagnosis of many types of civil and mechanical structures using modal data, such as natural frequencies and mode shapes.

Starting from simulated measured modal data such as natural frequencies and their corresponding mode shapes, this study presents the equations to update the physical parameters of stiffness and mass matrices simultaneously for analytical modelling by minimizing a cost function in the satisfaction of the dynamic constraints of orthogonality requirement and eigenvalue function.

Starting from simulated measured modal data such as natural frequencies and their corresponding mode shapes, a new computationally efficient and symmetry preserving method and associated theories are presented in this paper to update the physical parameters of damping and stiffness matrices simultaneously for analytical modeling.

The proposed method is based on the relationship between the perturbation of structural parameters such as stiffness change and the modal data measurements of the tested structure such as measured mode shape readings.

The related professions (traffic planners, ecologists, municipality officials …) need specific data such as traffic volumes, modal split, travel time, travel cost … Output data has to be exported to the different time intervals.

Locations of induced damages are initially determined using the proposed DRS and DRM methods and obtained data such as initial physical properties and modal parameters of the structure before and after the occurrence of damage.

Otherwise, modal data will be complex quantities.

The extracted modal data from experimental modal testing are usually complex values.

In general, modal data are obtained through either experimental or operational modal testing (Ewins 2000; He and Fu 2001).

On the other hand, measured modal data from experimental models are usually complex data.

Thus, initial properties of the laboratory frame are calculated using the real measured modal data.