Zero Poisson's Ratio Lattice Vibration Isolator
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Solution Overview
Problem
Current vibration isolator systems are complex and expensive, and often result in undesirable binding and tolerance issues due to lateral deformation of outer members, which complicates the isolation of vibrations from vehicle chassis to vehicle seats.
Innovation Solution
A vibration isolator with a compressible inner member and an outer member having a zero or near-zero Poisson's ratio, featuring a lattice structure that provides lateral support and maintains consistent diameter and compression force, offering quasi-zero stiffness characteristics to effectively attenuate vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional vibration isolator systems are used, then vibration isolation can be achieved, but the system becomes complex and expensive with undesirable binding and tolerance issues
Solution Approach 1:
The outer member is designed with a zero Poisson's ratio, which fundamentally changes the material parameter to prevent lateral expansion during compression. This parameter change eliminates the binding and tolerance issues that plague conventional isolators while maintaining effective vibration isolation, thereby resolving the contradiction between reliability and device complexity.
2Ease of operation
If the outer member deforms laterally during operation, then compression flexibility is improved, but binding and tolerance issues occur
Solution Approach 1:
By changing the Poisson's ratio parameter of the outer member to zero, the material is engineered to compress vertically without lateral expansion. This eliminates the manufacturing precision issues and tolerance problems that arise from lateral deformation, while preserving the necessary compression flexibility for vibration isolation.
3Stability of the object's composition
If a zero Poisson's ratio outer member is used, then lateral support and consistent diameter are maintained, but manufacturing difficulty increases
Solution Approach 1:
The patent employs composite material structures to achieve the zero Poisson's ratio property. By combining materials or structures in a composite configuration, the desired lateral support and diameter consistency are achieved while managing the manufacturing complexity through established composite fabrication techniques.
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 solution effectively limits the transmission of vibrations and forces between elements, providing improved isolation with reduced complexity and cost, suitable for various applications including vehicle seats and other equipment mounting systems.
Implementation Method 1
The outer member may include a tube with a zero or near-zero Poisson's ratio. The outer member (e.g., tube) may include a quasi-zero stiffness characteristic when in a compressed state.
Implementation Method 2
The outer member may include a tube with a zero or near-zero Poisson's ratio
Implementation Method 3
The outer member (e.g., tube) may include a quasi-zero stiffness characteristic when in a compressed state
Data Source
AI summary
Systems and methods for limiting transmission of vibrations and forces causing vibrations from one element to another are provided. A vibration isolator may include a compressible inner member and an outer member compressible with the inner member. The outer member may be positioned at least partially around the inner member to provide lateral support to the inner member. The outer member may maintain a consistent diameter and compression force when in a compressed state. The outer member may include a tube with a zero or near-zero Poisson's ratio.