Method and damper for adjustable speed limit of shear thickening damper

Abstract

The invention discloses a method for achieving the adjustable speed limiting effect of a shear thickening damper and the damper. According to the method and the damper, a cylinder body is filled witha shear thickening solution, one end of a piston rod slides in the cylinder body, the other end of the piston rod extends out of the cylinder body, a piston is fixed to the piston rod in the cylinderbody and is a hollow cylinder with a normal-open oil passage, the normal-open oil passage enables an effective throttling channel to communicate with a piston cavity, the throttling channel is formedbetween the outer side wall of the piston rod and the inner side wall of the piston, the outer side of the piston makes contact with the inner side of the cylinder body to slide relatively, the pistonrod is provided with external threads, one end of the piston is in a ring shape, an inner ring is provided with internal threads, the relative position of the piston rod and the piston can be adjusted through screw-thread fit, a conical pin is arranged at one end of the piston rod, a floating piston is used for compensating the space variation of the cylinder body caused by the piston rod entering and exiting the cylinder body, and the floating piston and the cylinder body are connected through an elastic element. The method and the damper have the advantages that 1, the structure is simple and reliable; 2, the adjustable speed limiting effect can be achieved; 3, the output force of the damper is large; and 4, the impact resistance can be achieved.

Description

technical field [0001] The invention relates to a vibration control technology of an engineering structure, in particular to an adjustable speed-limiting shear thickening damper. Background technique [0002] The shear thickening damper is a damper that uses the intelligent material shear thickening fluid as the working medium. Shear thickening fluid is a kind of intelligent material with excellent performance. Its viscosity characteristics depend on its shear strain rate. When subjected to high strain rate load, the viscosity of the liquid changes from thin to thick, and even changes from liquid phase to solid phase, that is, The shear thickening behavior occurs, and it is important that this change is reversible, and when the load is removed, it can instantaneously return from the solid phase to the liquid phase. The shear thickening damper utilizes this characteristic of the shear thickening fluid to show that the damping force rises sharply beyond the critical speed, an...

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Problems solved by technology

Due to the fixed structural parameters of the traditional shear thickening damper, the critical speed is fixed, and different speed limit requirements cannot be achieved.

Moreover, under low-speed vibration, the shear thickening damper does not reach the critical thickening speed, and the shear thickening behavior does not occur, and the damper has a small force output, so its control effect is not ideal, which hinders the shear thickening damper technology. large-scale engineering applications

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