Multi-Frequency Tuned Mass Damper for Building Vertical Vibrations
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vibration damping devices for building structures struggle to effectively reduce complexly coupled vertical vibrations due to diverse excitation forces and varying natural frequencies of structural materials, leading to insufficient damping effects.
Innovation Solution
A vibration damping device unit with multiple auxiliary vibration systems, each with distinct natural frequencies, is mounted to a building structure using a support base and linking members comprising a composite structure of metal coil springs and elastomers, allowing for flexible installation and enhanced damping performance across a wide frequency domain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single auxiliary vibration system is directly mounted to a specific part of the building structure, then the device complexity is reduced, but the vibration damping effect against complexly coupled vertical vibrations becomes insufficient
Solution Approach 1:
The patent divides the auxiliary vibration system into multiple independent systems, each with its own natural frequency. Multiple mass members are elastically linked to the support base through separate linking members, creating multiple auxiliary vibration systems that can independently dampen different frequency components of vertical vibrations.
Solution Approach 2:
The patent changes the natural frequency parameter of each auxiliary vibration system by adjusting the mass of mass members and the stiffness of linking members. This allows each auxiliary system to target specific frequency ranges, collectively covering the broad spectrum of vertical vibration frequencies from diverse excitation sources.
2Reliability
If multiple auxiliary vibration systems with different natural frequencies are implemented, then the vibration damping effect across wide frequency domain is improved, but the device complexity increases
Solution Approach 1:
The patent merges multiple auxiliary vibration systems into a single integrated device with a common support base. Multiple mass members are elastically linked to the same support base through separate linking members, combining the functions of multiple systems while sharing common structural components, thereby reducing overall device complexity.
Solution Approach 2:
The support base serves as a universal mounting structure for multiple auxiliary vibration systems. Each linking member with spring element and damping element provides multi-functional capability by simultaneously offering elastic support and vibration damping, reducing the need for separate components.
3Reliability
If linking members with both spring element and damping element are used, then the durability and design flexibility are improved, but the manufacturing complexity increases
Solution Approach 1:
The linking member is constructed as a composite structure combining a spring element (metal coil spring) and a damping element (elastomer or viscous damper). This composite design integrates both elastic and damping functions into a single component, improving durability through material synergy while the modular construction facilitates manufacturing.
Solution Approach 2:
The spring element acts as an intermediary between the mass member and support base, providing elastic support and isolating the damping element from direct mechanical shocks. This intermediary role protects the damping element and extends the overall system durability.
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 provides stable and efficient vibration damping across a wide frequency range, improving design flexibility and durability while effectively reducing vertical vibrations by integrating multiple auxiliary systems with different natural frequencies.
Implementation Method 1
a spring element and a damping element... the spring element has a function of elastically supporting the mass member
Implementation Method 2
a damping element... the damping element has a function of supporting the mass member together with the spring element
Implementation Method 3
linking members comprising a composite structure of metal coil springs and elastomers
Data Source
AI summary
A vibration damping device unit 10 is mounted to a building structure A to reduce vibration along a vertical direction for the building structure A. The vibration damping device has a support base 12 fixedly attached to a structural material a of the building structure A as a main vibration system. Mass members 20 are each elastically linked to the support base 12 by using a linking member 22, including a spring element and a damping element, thereby forming multiple auxiliary vibration systems 14. A tuned mass damper (TMD) is formed. The tuned mass damper has multiple natural frequencies in a vertical direction resulting from the auxiliary vibration systems 14.