Design of a Vibration Isolator Based on a Honeycomb Structure

Aluminium alloy honeycomb vibration isolators, owing to their thin-walled nature and periodic structure, offer numerous advantages, including lightweight construction, high strength, structural stability and simplicity of design parameters. Traditional honeycomb structures exhibit high stiffness in the coplanar direction but offer virtually no vibration isolation. To develop the vibration isolation performance of honeycomb structures in the coplanar direction and achieve vibration isolation protection for precision electronic instrument cabinets, this paper introduces a periodic corrugated structure based on traditional straight-hole honeycombs, designs a new type of corrugated honeycomb isolator, and screens and refines its vibration isolation performance. Using finite element simulation, multiple sets of orthogonal experiments were designed to perform range analysis on the simulation results, gradually eliminating the interference of irrelevant factors on the vibration transmission rate and optimising the dimensional parameters of the corrugated honeycomb isolator. To further optimise the vibration isolation performance of the corrugated honeycomb isolator, periodic circular holes were opened in the X and Y directions of the isolator, reducing its vibration transmission rate in the Z-direction and effectively improving the vibration isolation effect. Simultaneously, sweep frequency tests were designed to verify the accuracy of the finite element model.