Design and Multibody Dynamics Modeling of a Novel High‐Static‐Low‐Dynamic‐Stiffness Vibration Isolation Mechanism Based on Euler Buckling Characteristics

ABSTRACT

Vibration isolation has long been a critical area of research, with the design of isolators based on the mechanical properties of Euler buckling beams representing one of the primary approaches. Traditionally, the focus has been on utilizing the negative stiffness characteristics of a post‐buckled Euler beam in parallel with positive stiffness springs to design Quasi‐Zero Stiffness isolators. However, such designs often involve complex structures and limited effective working ranges. This study investigates the vibration reduction of a centrifugal pump, introducing a High‐Static‐Low‐Dynamic‐Stiffness vibration isolator that leverages the low stiffness characteristics of Euler buckling beams. This isolator is particularly suited for large‐load machinery, offering compactness and high static load capacity. Its advantages include a simple structure, low spatial requirements, a broad working range, and suitability for one‐direction vibration isolation in three‐dimensional machinery. The paper presents a multibody dynamics model and simulation of the centrifugal pump system integrated with the Euler buckling beam isolator, providing theoretical verification of its vibration isolation performance. A centrifugal pump vibration test bench is then designed to validate the performance of the isolator through experimentation. Finally, potential avenues for optimizing the isolator are discussed.