Natural frequencies and mode shapes of statically deformed inclined risers

Resonant Frequencies and Mode Shapes of Switched Reluctance Motors

The wide application of switched reluctance motors (SRM) is limited by their higher vibration and acoustic noise. An accurate determination of resonant frequencies and mode shapes of the SRM stator is therefore essential for low acoustic noise design. Based on the structural finite element method and elasticity theory, 3D vibration modes and resonant frequencies of a 5 hp SRM with 8/6 poles are...

On the undamped natural frequencies and mode shapes of a finite-element model of the cat eardrum.

This paper presents a three-dimensional finite-element model of the cat eardrum which includes inertial effects. The model is implemented using a hierarchical modeling scheme which permits the mesh resolution to be varied. The static behavior of the model is calculated as a function of mesh resolution in order to check the validity of an earlier model. The first six undamped natural frequencies...

Efficient Retrieval of Deformed and Occluded Shapes

We propose an approach for matching deformed and occluded shapes using Dynamic Programming (DP). Our algorithms handle noise and shape distortions by allowing matching of merged sequences of consecutive small segments in a shape, with larger segments of another shape, while being invariant to translation, scale and orientation transformations of shapes. We illustrate the effectiveness of our al...

Accurate Experimental Determination of Frequencies, Mode Shapes, and Dynamic Strains in Plate Valves of Reciprocating Compressors

Mode Interactions of an Inclined Cable Excited Close to Its Second Natural Frequency

In a cable-stayed bridge the bridge deck is supported by a large number of inclined cables of varying lengths and inclinations, which are suspended from a bridge tower. Vertical excitation of the bridge deck, for example, due to traffic loading, is influencing the cables. This may result in quite complex dynamics of those cables, whose basic vibration modes are near resonances with the excitati...