TMD (slab, bridge etc.)
VIBRATION CONTROL DEVICE
Vibration control device (mechanical)
TMD (Tuned Mass Damper)
TMD for vertical vibration (cantilever type/spring-supported type)
For countermeasures against walking vibration, traffic vibration, etc.
TMD for horizontal vibration
For countermeasures against wind, earthquakes, and other rolling movements of buildings, etc.
The TMD consists of masses, springs, and damping devices.
The cantilever type TMD is a cantilever structure that holds the mass by a spring and vibrates the mass up and down using the torsion axis as a fulcrum to absorb vibrations from slabs and other objects.
By moving the mass, the frequency can be tuned without replacing the spring.
Install a TMD with a mass ratio of about 3-5% to the mass of the slab or other vibration target.
By tuning the frequency of the TMD to the target structure, the TMD resonates and vibrates many times more than the target structure.
As the TMD vibrates, it absorbs the vibration energy of the target structure and reduces vibration.
This is a photograph of the operation after the installation of the TMD vibration control system.
TMDs for vertical vibration and TMDs for horizontal vibration are available depending on the application.
Example of effect: heel excitation
Example of effect: Walking Excitation
This report compares AMD (Active-Mass-Damper) and TMD (Tuned-Mass-Damper), which are commonly used for vibration control of building floors, in terms of features, cost, and maintainability.
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Introduction of TMD Series
This page explains the "features, principles, structure, installation examples, effects, etc." of Yacmo's TMDs, which can handle a wide range of vibration from small vibrations caused by walking to large shaking caused by wind and earthquakes. Read this to deepen your understanding of TMDs.
⇒Let's look at some of the materials
Introduction of Horizontal TMD
Features and installation examples of horizontal TMDs that reduce lateral sway from earthquakes, strong winds, and traffic vibrations are introduced.
⇒Let's look at some of the materials
Resolving TMD Questions! Frequently Asked Questions Q&A
Frequently asked questions about TMD are summarized in a Q&A format. Please use it as a reference for product selection and countermeasures.
⇒Let's look at some of the materials
Points and weaknesses of TMD that you need to know in order to achieve optimal results.
TMD is often used as an effective floor sway countermeasure, but it does not work for all types of sway. This section explains the principles of TMD and provides an easy-to-understand explanation.
⇒Let's look at some of the materials
Vibration Problems in Steel Construction Reasons and Countermeasure Points
This section explains the reasons for the swaying of steel-framed structures and summarizes the key points to keep in mind during the design phase to determine how to reduce vibration and ensure livability.
⇒Let's look at some of the materials
Wind sway countermeasures for mid- and high-rise buildings increase occupant performance!
Wind sway can be a problem not only in skyscrapers but also in long, narrow mid-rise buildings that are built on narrow lots in urban areas. This section introduces the causes of wind sway in mid-rise buildings and examples of horizontal TMD installations that are effective as wind sway countermeasures.
⇒Let's look at some of the materials
Vertical Nori Vibration Control in Buildings
In recent years, there has been an increase in the number of complexes and tenant buildings that house facilities for various purposes. In particular, the vertical groove vibration of dances and live performances in sports facilities, studios, halls, etc. is often a problem because the vibration is so large that it travels through the building and adversely affects other stores and other facilities. What is vertical groove vibration? What countermeasures are available? This section summarizes actual examples of improvements.
⇒Let's look at some of the materials
Walking vibration countermeasure for long-span floors
Spacious, open offices with long spans and no pillars are popular, but such long-span structures can cause the floor to sway easily when walking, which can lead to a poor working environment. In this document, we will explain why walking vibration occurs and how to prevent it. How can walking vibration be prevented? What kinds of floors have caused problems? Actual examples of long-span floor vibration countermeasures are explained and introduced in a comprehensive manner.
⇒Let's look at some of the materials
Database of TMD mass mass performance for vertical vibration
The following is a list of 808 TMD mass masses for vertical vibration that Yacmo has installed to date, sorted by structure and application, for your reference when considering TMD sizes and mass masses.
⇒Let's look at some of the materials
Lineup of Vibration Damping Devices for Vertical Vibration (TMD) Examples
We will introduce the structure and features of each lineup of Yakumo's Vibration Damping Devices (TMD) for Vertical and Vertical applications and their case studies.
Simple Selection Method for Wind Vibration Damping Devices (AMD, TMD)
Among the vibration control devices widely known as wind and microvibration countermeasures for habitability of building structures, this section explains how to determine simple specifications for passive-type TMDs and active-type AMDs.
Countermeasure points and improvement examples for machine vibration problems generated from production equipment, etc.
We will explain countermeasure points on the theme of machine vibration countermeasures for production equipment and other machinery, along with examples of improvements.
Horizontal TMD for wind sway control in medium and high-rise buildings
The features of horizontal TMDs, which are ideal for wind sway control, will be introduced along with actual examples.
⇒For details, click here.
