Variable Stiffness Vibration Coupling via Rotating Planar Membrane
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Solution Overview
Problem
Existing mechanical vibration transmission and decoupling systems face challenges in dynamically adjusting rigidity to adapt to changing vibrational states, leading to resonance issues and increased noise and mechanical stress, particularly in machine mounting applications.
Innovation Solution
A device featuring a surface element with variably adjustable stiffness, allowing components to rotate relative to each other, thereby changing the contact areas and surface elasticity, enabling abrupt adjustments in rigidity and decoupling capabilities without external design changes, suitable for both vibration damping and bearing functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a coupling element with fixed, predetermined rigidity is used to mount a machine on a machine foundation, then the machine can be mounted with reduced vibrations, but the system cannot adapt to changing vibrational states and may operate in resonance conditions leading to increased noise and mechanical stress
Solution Approach 1:
The coupling element incorporates a planar membrane with variable surface elasticity that can be dynamically adjusted during operation. At least one actuator made of converter material is applied to the membrane to change its deformability in real-time, allowing the system to adapt to different vibrational states and avoid resonance conditions while maintaining vibration reduction benefits
2Object-affected harmful factors
If a vibration absorber with fixed tuning frequency is used to dampen vibrations, then the vibrations can be compensated in a narrow frequency band, but the effective range is limited when vibrational states change
Solution Approach 1:
The vibration absorber uses a planar membrane coupling element whose surface elasticity can be dynamically adjusted via actuators made of converter material. This allows the tuning frequency of the absorber to be adapted in real-time to match changing excitation frequencies, significantly expanding the effective frequency range while maintaining vibration damping effectiveness
3Adaptability or versatility
If actuators made of converter material are applied to a planar membrane to change its surface elasticity, then the rigidity can be variably adjusted to adapt to vibrational states, but the device complexity increases
Solution Approach 1:
The invention replaces traditional mechanical adjustment mechanisms with actuators made of converter materials (such as piezoelectric, magnetostrictive, or shape memory materials). These actuators directly change the surface elasticity of the planar membrane through material property changes rather than mechanical deformation, reducing the need for complex mechanical adjustment structures while achieving variable rigidity
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 device achieves a wide range of stiffness adjustments with minimal time delay, ensuring effective vibration reduction and decoupling, suitable for various environments and applications, including machine mounting and vibration absorption, while maintaining a compact and robust design.
Implementation Method 1
a coupling element which has a variably adjustable rigidity along at least one direction of action, along which at least one component is mounted in an oscillating manner
Data Source
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Figure 3a~3b
AI summary
The invention relates to a device for transmitting or decoupling mechanical vibrations, comprising a first component and a second component, which are connected to each other by means of a coupling element that has a variably adjustable stiffness in at least one direction of action in which at least one component is supported in a vibrating manner. The invention is characterized in that the coupling element is a planar element having a planar-element top side and a planar-element bottom side and a planar-element longitudinal extent, the planar element being dimensionally stable in the planar-element longitudinal extent and elastic lateral to the planar-element longitudinal extent, that n > 2 contacting agents are attached to the first component in a spatially fixed manner, by means of which contacting agents the first component contacts n > 2 first contact points at the planar-element bottom side and/or planar-element top side of the planar element, that n > 2 contacting agents are attached to the second component in a spatially fixed manner, by means of which contacting agents the second component contacts n > 2 second contact points at the planar-element bottom side and/or planar-element top side of the planar element, and that both components are arranged such as to be rotatable relative to each other about a spatial axis oriented orthogonally to the planar-element longitudinal extent, said spatial axis coinciding with the at least one direction of action in which at least one component is supported in a vibrating manner.