Bistable nonlinear energy hydrazine based on electromagnetic negative stiffness

Abstract

The invention discloses a bistable non-linear energy source based on electromagnetic negative stiffness, wherein the magnetic ring, the central rod and the upper and lower pressure springs can move relative to the first sleeve and the second sleeve in the axial direction, and the upper and lower pressure The spring provides support for the system; the upper and lower magnetic rings and the upper and lower coils respectively apply attractive force to the middle magnetic ring to form an online adjustable electromagnetic negative stiffness spring, and the electromagnetic negative stiffness spring is connected in parallel with the upper and lower counter-pressure springs to form a bistable nonlinear energy hydrazine; When the upper and lower coils are not energized, the negative stiffness performance of the permanent magnet can be adjusted by adjusting the distance between the upper and lower magnetic rings and the middle magnetic ring; Electromagnetic negative stiffness performance: the invention uses electromagnetic negative stiffness springs to realize nonlinear energy hydrazine with two balance points, broadens the vibration absorption frequency band, reduces the energy input threshold, and can realize the one-way transmission of multi-mode vibration target energy.

Description

Technical field [0001] The present invention relates to the field of absorbing techniques, and more particularly to a dual steady non-linear energy hydrazine based on real-time adjustable electromagnetic anesformation. Background technique [0002] With the rapid development of the national economy and the defense, the demand for high-tech is increasing in the fields of aerospace and navigation, and its own and equipped high-precision payloads have put forward more and higher requirements for the vibration environment. On the one hand, the antenna on the spacecraft develops toward flexible, large-scale direction, so that the structural flexibility increases, low-frequency modal intensive, vibration to be generated by external interference, thereby affecting the effective load of the payload; On the one hand, with the increasing high-speed operation, the mechanical equipment and the large-scale and thinness of the hull are often difficult to meet the system's vibration reduction r...

AI Technical Summary

Problems solved by technology

However, existing studies on NES have shown that the premise that NES can achieve high-efficiency vibration absorption is that the main system needs a certain energy input, that is, there is an energy input threshold; at the same time, in the process of structural design of NES, the pure cubic stiffness of NES is difficult. realization dilemma

Images