Low-frequency tuned mass damping device with reverse-stretched compression springs

A low-frequency tuned mass damping device with reverse-stretched compression springs, wherein the low-frequency tuned mass damping device comprises helical compression springs (1) and a tuned mass (2);

• the helical compression springs (1) are placed vertically, horizontally or obliquely, the bottom coils are fixed on circular rings having corresponding sizes, pressure is continuously applied to the helical compression springs (1) at the top coils or intermediate local positions of the helical compression springs (1) until the top coils of the helical compression springs (1) pass through or fit over the bottom coils and flip over, and the helical compression springs (1) are fixed in the flipped state;
• the bottom coils of the helical compression springs (1) in the flipped states are installed on a top plate of a box girder or at the top of a built-in support of the box girder, and the helical compression springs (1) at this time are reverse helical compression springs (1);
• the top coils of the helical compression springs (1) are located at lowermost expansion ends and are connected with the tuned mass (2) for hanging the tuned mass (2);
• and the reverse helical compression springs (1) are used to balance the gravity of the tuned mass (2) and provide stiffness, and the two form the low-frequency tuned mass damping device.