Compression Properties and Energy Absorption of A Novel Double Curved Beam Negative Stiffness Honeycomb Structures

This paper presents the design of a novel honeycomb structure with a double curved beam. The purpose of this design is to achieve vibration isolation for the main engine of an offshore platform and reduce impact loads. An analytical formula for the force-displacement relationship of the honeycomb single-cell structure is presented based on the modal superposition method. This formula provides a theoretical basis for predicting the compression performance of honeycomb structures. The effects of structural geometric parameters, series and parallel connection methods on the mechanical and energy absorption properties are investigated through mathematical modeling and experimental methods. Furthermore, the study focuses on the vibration isolation and impact resistance performance of honeycomb panels. The results show that the designed honeycomb structure has good mechanical and energy absorption performance, and its energy absorption effect is related to the geometric parameters and series and parallel connection methods of the structure. The isolation efficiency of the honeycomb with 4 rows and 3 columns reaches 38%. The initial isolation frequency of the isolator is 11.7 Hz.