A kind of shock load mitigation device and method based on shape memory alloy

Abstract

The invention discloses a shape memory alloy based impact load retarding device. The shape memory alloy based impact load retarding device comprises a shape memory alloy gasket, a shape memory alloy sleeve and a connector. The shape memory alloy sleeve is arranged between an upper connecting piece to be subjected to vibration attenuation and a lower connecting piece to be subjected to vibration attenuation. The connector comprises a nut and a connecting rod. The shape memory alloy gasket is used for being arranged on the upper connecting piece. One end of a rod body of the connecting rod is provided with a cap body. The rod body penetrates through the upper connecting piece, the sleeve, the lower connecting piece and the shape memory alloy gasket in sequence. The other end of the rod bodyis in threaded connection with the nut. The shape memory alloy gasket and the shape memory alloy sleeve are both in a martensite phase transformation critical stress state by tightening the nut. The invention further discloses an impact load retarding method of the shape memory alloy based impact load retarding device. Through the impact load retarding method, the assembly tightness of the upper connecting piece, the lower connecting piece and the connector is ensured, impact and vibration between the upper connecting piece and the lower connecting piece are reduced. Moreover, the shape memoryalloy based impact load retarding device is simple in structure and easy to dismantle.

Description

technical field [0001] The invention relates to the technical field of buffering and vibration reduction, in particular to an impact load mitigation device and method based on a shape memory alloy. Background technique [0002] At present, due to the needs of industrial development and production, especially in the fields of aerospace, ships and other high-precision defense, there are higher requirements for the precision of equipment and vibration control of equipment. Now, although shape memory alloys have been used as shock absorbers in the field of structural vibration reduction, most of the applications of these shape memory alloys in the field of vibration and noise reduction only use the superelasticity or martensitic properties of austenitic shape memory alloys. The high damping properties of bulk shape memory alloys are used for vibration reduction, but the advantages of shape memory alloys cannot be fully utilized, and most of them have complex structures and are d...

AI Technical Summary

Problems solved by technology

Now, although shape memory alloys have been used as shock absorbers in the field of structural vibration reduction, most of the applications of these shape memory alloys in the field of vibration and noise reduction only use the superelasticity or martensitic properties of austenitic shape memory alloys. The high damping properties of bulk shape memory alloys are used for vibration reduction, and the advantages of shape memory alloy performance cannot be fully utilized, and most of them have complex structures and are difficult to disassemble

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