Arcuate Beam Linkage With Elastomer Damping
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Solution Overview
Problem
Existing mechanical linkages face challenges in achieving both high stiffness and high damping characteristics, as materials typically excel in either stiffness or damping but not both, leading to complex and costly damping mechanisms with limited effectiveness.
Innovation Solution
A mechanical linkage design featuring elastomer damping members, oppositely oriented arcuate beams, and alternating fingers that are integrally formed from materials like steel, titanium, or carbon fiber, providing both high stiffness and damping through a viscoelastic material bonded between the fingers, which absorbs and dissipates mechanical forces effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If high stiffness materials such as steel are used, then mechanical stiffness is improved, but damping capability deteriorates
Solution Approach 1:
The patent combines steel beams (providing stiffness) with elastomer damping members (providing damping) into a composite mechanical linkage system. The steel arcuate beams maintain structural rigidity while the bonded elastomer layers dissipate vibrational energy, achieving both high stiffness and high damping characteristics simultaneously.
2Loss of energy
If damping mechanisms such as fluid dampers with bellows and seals are added, then damping capability is improved, but device complexity and maintenance requirements worsen
Solution Approach 1:
The patent merges the damping function directly into the structural linkage by bonding elastomer damping members to the steel beams. This integration eliminates the need for separate fluid dampers, bellows, and seals, reducing the number of parts while maintaining effective damping capability.
Solution Approach 2:
The elastomer damping members are simple, solid-state components without moving parts or seals that require maintenance. While the elastomers may have limited service life compared to metal components, their simplicity and lack of maintenance requirements make them advantageous over complex fluid damping systems.
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 design achieves a balance of high stiffness and damping, reducing wear and damage from vibrations and impacts in aerospace applications, while minimizing complexity and maintenance, using commercially available materials like Soundcoat Dyad 601 and Neoprene, and offering a compact, passive solution without electronics.
Implementation Method 1
A damping member is bonded between adjacent fingers in the lateral space
Implementation Method 2
materials and members that are effective at energy damping often have low mechanical stiffness
Implementation Method 3
In one specific embodiment, the damping member comprises an elastomer
Data Source
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AI summary
A mechanical linkage (100) includes first and second end members (104a, 104b) and a pair of generally parallel arcuate beams (106), interconnecting the end members and defining a lateral space (108) therebetween. A plurality of alternating fingers (110) extend from each beam into the lateral space, and a damping member is attached between each adjacent pair of fingers within the lateral space.