Partitioning Wall Precompression in Vibration Damping Devices
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Solution Overview
Problem
Existing vibration damping devices face challenges in enhancing the durability of partitioning walls, particularly under orthogonal vibrations, due to stress concentration and increased manufacturing costs associated with separate member assemblies.
Innovation Solution
The vibration damping device integrates a segmented outer peripheral member with a positioning member to apply precompression to the partitioning wall, allowing it to deform freely and reduce stress concentration, while maintaining the partitioning wall's integrity and simplifying assembly by eliminating the need for separate components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the partitioning wall is formed as a separate member to enhance durability, then the durability is improved, but the manufacturing cost increases due to multiple components
Solution Approach 1:
The partitioning wall is integrated directly into the elastic body as a unified structure, eliminating the need for separate partitioning wall components. This merging of the partitioning wall and elastic body reduces the total number of parts while maintaining the durability benefits through proper structural design of the integrated component.
2Ease of manufacture
If the partitioning wall is formed as a separate member, then assembly flexibility is improved, but manufacturing cost increases
Solution Approach 1:
The partitioning wall and elastic body are manufactured as a single integrated component, reducing the number of parts to manufacture, assemble, and manage. This integration simplifies the manufacturing process while maintaining design flexibility through the unified structural approach.
3Strength
If the partitioning wall is made rigid to withstand stress, then strength is improved, but stress concentration increases under orthogonal vibrations
Solution Approach 1:
The partitioning wall is designed with optimized thickness and material properties that balance strength and flexibility. By carefully selecting the thickness parameter and material characteristics, the partitioning wall achieves sufficient strength to withstand axial loads while remaining flexible enough to accommodate orthogonal vibrations without excessive stress concentration.
Solution Approach 2:
The partitioning wall is designed to dynamically respond to different vibration modes. Under axial vibrations, it maintains structural integrity through its rigid connection to the elastic body. Under orthogonal vibrations, it allows controlled deformation to reduce stress concentration, effectively adapting its mechanical response to the type of vibration encountered.
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
This configuration enhances the durability of the partitioning wall under both axial and orthogonal vibrations, reduces manufacturing costs, and maintains effective vibration damping performance through liquid column resonance mechanisms.
Implementation Method 1
the elastic body that is disposed between the inside attachment member and the outer peripheral member undergoes elastic deformation due to the input vibration
Implementation Method 2
Vibration is absorbed by vibration absorbing action based on for example internal friction of the elastic body
Implementation Method 3
A damping function is exhibited due to for example liquid column resonance inside the first restriction path
Implementation Method 4
A damping function is exhibited due to for example liquid column resonance due to this liquid through flow
Data Source
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AI summary
A partitioning wall is integrally formed to a rubber elastic body, partitioning second main liquid chambers. An upper outer peripheral member and a lower outer peripheral member are positioned in the axial direction by a partitioning wall positioning member disposed in the second main liquid chambers. The partitioning wall is retained to the peripheral inside of a retaining member in an axial direction (S) compressed state.