Mass-Based Passive Control
Mass Particle Damper is a passive vibration control device that uses granular materials such as iron sand, lead particles, or steel balls inside a dedicated cavity. By combining mass effect with internal particle motion, it helps reduce structural response under dynamic loading.
This type of system can serve projects that need a practical vibration reduction strategy with wide applicability and durable long-term performance.
Field-Proven Reliability
One representative application is the Parque Araucano project in San Diego, where roof-level concrete boxes filled with metal particles were suspended with hanging basket bolts. The installation successfully withstood the Chile earthquake in 2010 without damage after the event.
The system is especially effective where designers want broad vibration control performance without heavily relying on fine tuning alone.
Durable Energy Dissipation
Compared with many traditional dynamic vibration absorbers, MPD systems can adapt to a wider frequency range because of the nonlinear interaction among particles. They are also less sensitive to temperature change and offer strong durability for long-service applications.
Momentum Exchange and Friction
When the main structure vibrates, particles inside the cavity repeatedly collide with the enclosure and with each other. These impacts and frictional movements exchange momentum and continuously dissipate vibration energy.
By combining a mass-based response effect with particle energy dissipation, the system can offer stable passive control across a relatively wide operating range.
Bridges
Suitable for bridge vibration response control and serviceability improvement.
Large Cantilevered Structures
Helps limit horizontal vibration in long-span and cantilever-dominant structures.
High-Rise Buildings
Improves comfort and vibration performance in tall building applications.
High-Rise Structures
A dependable passive option for structures exposed to wind and seismic actions.
Installation and Use Methods
The particle-filled box can be fixed directly onto structural zones with strong vibration demand, allowing local vibration control through a relatively straightforward passive installation.
In distributed damping schemes, particles may also be arranged inside structural cavities such as partition walls, stair slabs, overhead insulation layers, equipment spaces, box girders, towers, and hollow piers. This can achieve economical damping enhancement without significantly affecting usable space or exterior appearance.
MPD systems can also be configured in a TMD-like form, where the particle cavity acts as the mass component and dissipates tuned vibration energy through internal collision and friction.
