Aiming at the mode mixing problem caused by intermittency signal in the sifting process of empirical mode decomposition(EMD),a new solution is presented.

A new method has been proposed to solve the problem of mode mixing in empirical mode decomposition(EMD).

The reason to mode mixing in the result of empirical mode decomposition is discussed in respect of the variation of extremum series.

The EMD added Gauss white noise is proposed to avoid mode mixing of different time-scale IMF,and is applied in fault diagnosis for rotating machine.

TLHUSM\'s analytical model was educed detailedly herein based on Lagrange equation,electromechanical coupled equation and mode superposition principle.

The objective of the present study is to reconstruct the deformed shape of the tested structures, and in the dissertation the methods based on the theory of modal superposition and monitoring strain data was detailed analyzed, then three theory models and their modified models and their application for shape reconstruction were given.

When calculating spectrum response of a box frame, it was discovered that the re sults depended greatly on the chosen methods of modal superposition.

An annotation of modal superposition method of linear oscillation system;

In the article,the analytical solution s expression of the driving deformation of beam is derived by using modal superposition method,and the dynamic response characteristic curves of the central deflection of the beam versus the non-dimensional time under the sudden load and step load are plotted.

Multi-flexible body dynamics is introduced into crankshaft computing,and diesel engine crankshaft dynamics simulation model is established combined with finite element method and modal superposition method.