Buckling Beam Isolation via Adjustable Boundary Conditions
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Solution Overview
Problem
Existing low-frequency vibration and shock isolation systems are limited by their variable performance, high cost, temperature sensitivity, and limited energy dissipation, with fully active systems requiring sophisticated control algorithms and passive systems lacking adjustable negative stiffness.
Innovation Solution
A buckling beam isolation system with a variable torsional stiffness mechanism that allows for continuous adjustment of negative stiffness over large displacements, enabling efficient vibration and shock isolation by changing the boundary conditions of the beam.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If passive negative stiffness isolation systems are used, then ultra-high stiffness and ultra-high hysteretic damping are achieved, but the system lacks active tuning or adjustment capability
Solution Approach 1:
The patent applies the Dynamics principle by transforming the static boundary conditions of the buckling beam into dynamic, adjustable conditions. The restraining mechanism allows the boundary conditions to be modified in real-time, enabling the system to adapt its negative stiffness characteristics dynamically rather than being fixed in a passive state.
Solution Approach 2:
The patent implements Parameter changes by modifying the boundary conditions of the buckling beam through the restraining mechanism. By changing the restraint parameters (such as the degree of constraint or positioning), the system can continuously adjust the negative stiffness value, thereby achieving both high performance and adaptability.
2Adaptability or versatility
If variable damping force systems with variable geometry orifice or viscosity change are used, then variable performance is achieved, but the systems are expensive and temperature sensitive
Solution Approach 1:
The patent applies the Taking out principle by removing the complex temperature-sensitive damping components (variable geometry orifices, viscosity control mechanisms) from the system. Instead, it extracts and utilizes the inherent negative stiffness property of the buckling beam, which provides variable performance through boundary condition adjustment rather than through complex damping control mechanisms.
3Use of energy by moving object
If fully active isolation systems are used, then energy storage and release capability is achieved, but sophisticated control algorithms and actuator limitations are required
Solution Approach 1:
The patent applies the Mechanical vibration principle by utilizing the natural buckling and vibration characteristics of the beam. The system leverages the beam's inherent dynamic behavior under compression to achieve energy storage and release, eliminating the need for sophisticated control algorithms and complex actuator systems while maintaining effective isolation performance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system provides continuously variable negative stiffness, enhancing performance and functionality over a wider range of conditions, suitable for applications in transportation and payload isolation, while maintaining stability and adaptability to changing loads and vibrations.
Implementation Method 1
a buckling beam comprising a first end and a second end
Implementation Method 2
The isolation system comprises: a buckling beam comprising a first end and a second end; and a first restraining mechanism engaged with the buckling beam, the first restraining mechanism being configured to variably control a first restraining condition of the buckling beam and to thereby affect a negative stiffness of the buckling beam
Data Source
AI summary
An isolation system and method are disclosed. The isolation system includes a beam that includes a first end and a second end. The isolation system may include at least one clamping block comprising first elastomeric material, and the first end may be coupled with the first elastomeric material by the at least one clamping block. An end condition of the buckling beam may be varied based on compression stiffening of the first elastomeric material.