Belt Vibration Damping System for Closed-Type Domes

Studies on the damping of vibrations of closed domes under seismic influence are presented. To ensure the effect of vibration damping, a new tape system is used. The quenching effect is achieved by one-way connections of tape systems. A dynamic analysis of the dome vibrations is carried out. For a comprehensive evaluation of the damping system, numerical experiments were carried out with different locations of the belt vibration dampener and the determination of the most rational version of the belt system for different configurations of domes. The design scheme of the dome was a three-dimensional rod system consisting of rigidly fixed steel pipes of square cross-section. The design was calculated using the finite element method. When conducting a numerical experiment, the method of central differences was used to solve the differential equation of motion. It is shown that with the trapezoidal arrangement of the damper, a significant (more than 50%) decrease in the maximum amplitudes of the dome oscillations is observed. Moreover, for several peak values of displacements, the vibration damping effect reaches 80%. For flat domes, the option of cross-positioning the extinguisher belts is effective. To increase the effective volume of the dome space, it is advisable to use the option of three-point attachment of the extinguisher tapes, while the extinguishing effect increases. With this setup, there is a decrease in the values of the maximum deviations of the nodes by another 4–10%, compared to the cross arrangement. It is shown that belt dampers are an effective means of damping vibrations.