In the design and operation of modern buildings, bridges and large-scale equipment, wind-induced vibration has always been the focus of engineers' attention. With the increase of structure height and span, the influence of wind load is more obvious, and traditional reinforcement or single damping means are often difficult to meet the requirements. Under this background, Pendulum Tuned Mass Damper (PTMD) has gradually become a powerful technical means to control wind-induced vibration of structures.

First, the challenge of wind-induced vibration control

More flexible structures: Modern buildings and long-span bridges are more pursuing lightweight and aesthetic design, which leads to relatively weak structural stiffness and more prone to wind-induced vibration.

Multi-frequency excitation: natural wind has the characteristics of pulsation and instability, which makes the structure respond in multiple frequency bands.

Comfort and safety requirements are improved: it is necessary not only to ensure the safety of the structure, but also to take into account the comfort of users.

Second, the working principle of pendulum tuned mass damper

Pendulum tuned mass damper is based on conventional tuned mass damper (TMD), which suspends the additional mass as a pendulum and absorbs and counteracts the vibration energy of the main structure by swinging. Its core principles include:

Frequency tuning: the swing length determines the swing period. By adjusting the swing length, it can be close to the natural frequency of the structure, thus achieving efficient energy dissipation.

Damping energy consumption: the pendulum and damping element cooperate to convert vibration energy into heat energy or consume it in other forms.

Third, the outstanding advantages of pendulum tuned mass damper

High adaptability

Swing structure is easy to adjust parameters, and can be customized for different building heights, bridge spans or equipment characteristics.