Repulsive force type magnetic force negative stiffness honeycomb structure

Abstract

The invention provides a repulsive force type magnetic force negative stiffness honeycomb structure. The structure comprises an upper structure and a lower structure, the upper structure and the lowerstructure are in a mirror image, magnetisms of magnets of the upper structure and the lower structure are arranged in the opposite direction, the upper structure and the lower structure are connectedthrough a support, the upper structure is formed by multiple single-cell structures which are connected, and each single-cell structure comprises a wall plate, joints, a first transmission rod, a second transmission rod, a first bending beam, a second bending beam and a permanent magnet plate. The wall plates are connected with the first bending beams through the first transmission rods, the first bending beams and the second bending beams are arranged in a mirror image, the joints are arranged at the two ends of the first bending beams and the two ends of the second bending beams, the secondtransmission rod is arranged at the shortest distance position of each first bending beam and the corresponding second bending beam, and the permanent magnet plates are arranged on the connecting lines of the vertical middle positions of the second transmission rods and the joints. Through positive and negative stiffness combination, high static stiffness and low dynamic stiffness can be obtained, the vibration isolation interval can be expanded, and the contradiction between the static displacement and the vibration isolation effect can be solved.

Description

technical field [0001] The invention belongs to the technical field of vibration and impact mitigation materials for spacecraft, and in particular relates to a repulsion-type magnetic negative stiffness honeycomb structure. Background technique [0002] In aerospace engineering, due to the requirements of high performance, light weight and structural functionalization, composite material rods and honeycomb sandwich structures have been widely used; such materials have low stiffness and high flexibility, and their deformation It needs to be considered, but for some components of the spacecraft, its deformation does not need to be taken into account, and the spacecraft system becomes a rigid-flexible coupling dynamic system composed of rigid body and flexible body connection. At the same time, in order to achieve the requirements of weight reduction and structural strength and stiffness, a large number of truss structure designs are applied to the design of spacecraft, which m...

AI Technical Summary

Problems solved by technology

At the same time, in order to achieve the requirements of weight reduction and structural strength and stiffness, a large number of truss structure designs are applied to the design of spacecraft, which makes the natural frequency distribution of the spacecraft more complicated.

The vibration and shock mitigation materials in the prior art have poor damping characteristics, low reliability, and low robustness, and cannot meet the existing needs in the aerospace field

Images