Abstract
A new reduced-order modeling method for flexible multibody systems is proposed in this paper. This model is designed using the property of mode shapes, natural frequencies and modal mass, as well as real mass, real moment of inertia and center of gravity instead of material properties such as mass density, module of elasticity and volume. To represent elastic deformation during large translational motion and large rotational motion, the momentum and angular momentum of each vibration mode are considered. Because state differential equations are obtained from the equations of motion of multibody systems, all coupling terms are included. Therefore, a highly accurate state-space model can be obtained. As an example of this approach, the application to elastic vehicles to suppress vibration of a car body is studied.
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