Research on calculation method of the drawbead restraining force based on simulation

A kind of reasonable and effective drawbead restraining force model has to be built to improve the simulativeprecision in the numerical simulation of panel.

The governing equations of a beam with electro-magnetic constrained damping layers(EMCLD)are derived based on Hamilton Principle and simulated,which indicates the control current and thickness of damping layer how to affect the control results,and verifies EMCLD with simply configuration,reasonable actuated manner and low energy consumption,to be effective for active vibration control.

The shear strains in visoelastic damping layers resulting from the attraction arrangement magnets at the constraining layers end are higher than that in the conventional passive constrained damping layer(PCLD).

ased on the basic electric circuit principle and the theory of the multi-coiled transformer, the impedance constraint relations by which balance function can be realized inYN/V transformer is analyzed and derived in this paper.

Beam element model analysis of composite beam with constrained damping layer;

Secondly with non-damping layers,free damping layers and constrained damping layers,the oil pan noise radiation is analyzed.

To cut down element number for modeling structure with constrained damping layer(CDL) in general FEM software,the whole element method is adopted to solve the extension,bending and torsion vibration of the hollow circular beam with CDL.