This work deals with the active control of the vibrations of mechanical structures incorporating magnetorheological elastomer. The damping coefficient and shear modulus of the elastomer increase when exposed to a magn...This work deals with the active control of the vibrations of mechanical structures incorporating magnetorheological elastomer. The damping coefficient and shear modulus of the elastomer increase when exposed to a magnetic field. Compared with the vibration control where the elastomer is permanently exposed to a magnetic field, the control of this process through time reduces vibrations more effectively. The experimental study for the vibrations of a sandwich beam filled with an elastomer is conducted, followed by a numerical study using the Abaqus code. The vibration damping is found to be dependent on the loading rate of micro-size ferromagnetic particles in the elastomer.展开更多
A novel approach for partitioning and coordinating the collaborative design optimization of complex systems is described.A partitioning metric has been formulated to select the best partitioning solutions among the to...A novel approach for partitioning and coordinating the collaborative design optimization of complex systems is described.A partitioning metric has been formulated to select the best partitioning solutions among the total possibilities of dividing the complex design optimization problem.Then,an agent-supported approach is used for the coordination of the collaborative design optimization.The approach has been applied to the case of a preliminary design of an electric vehicle,to demonstrate how various agents can effectively communicate with each other to provide support to the collaborative design optimization of complex systems.展开更多
文摘This work deals with the active control of the vibrations of mechanical structures incorporating magnetorheological elastomer. The damping coefficient and shear modulus of the elastomer increase when exposed to a magnetic field. Compared with the vibration control where the elastomer is permanently exposed to a magnetic field, the control of this process through time reduces vibrations more effectively. The experimental study for the vibrations of a sandwich beam filled with an elastomer is conducted, followed by a numerical study using the Abaqus code. The vibration damping is found to be dependent on the loading rate of micro-size ferromagnetic particles in the elastomer.
文摘A novel approach for partitioning and coordinating the collaborative design optimization of complex systems is described.A partitioning metric has been formulated to select the best partitioning solutions among the total possibilities of dividing the complex design optimization problem.Then,an agent-supported approach is used for the coordination of the collaborative design optimization.The approach has been applied to the case of a preliminary design of an electric vehicle,to demonstrate how various agents can effectively communicate with each other to provide support to the collaborative design optimization of complex systems.
