Optimal design method for series-parallel tuned mass dampers

Abstract

The invention provides a method for optimizing the design of a series-parallel tuned mass damper, which includes the following steps: establishing a system model of the structure-DSPTMD; according to the principle of structural dynamics, establishing the main structure of the building-DSPTMD system dynamics equation; comparing TMD and DPTMD, The optimal design of vibration control for series-parallel tuned mass dampers using genetic algorithm; by referring to the optimization results, considering the effectiveness of the control and the effectiveness of the stroke control of the damping system, the optimal combination parameters are selected to guide the actual engineering design. Compared with TMD, the present invention can greatly improve the effectiveness by adjusting the ratio between the two mass blocks; at the same time, within a certain mass ratio range, the stroke of DSPTMD can be greatly reduced, and at the same time, the seismic action can be effectively controlled The displacement response of the lower structure. Compared with DPTMD, DSPTMD can greatly reduce the damping on the basis of a slight increase in effectiveness, and at the same time, when the ratio of the two mass blocks is within a certain range, the stroke can be continuously reduced to achieve optimal control.

Description

technical field [0001] The invention relates to an optimal design method of a series-parallel tuned mass damper (Double-Series-Parallel Tuned MassDampers, DSPTMD). Background technique [0002] Earthquake is a common and sudden natural disaster, which is still very low in predictability, widely distributed and severely damaged. Once it occurs, it will cause very serious losses to human beings. In addition to direct impacts such as house damage and collapse and casualties, earthquakes can also trigger secondary disasters such as fires and diseases, causing huge safety hazards and economic losses. my country is one of the countries most severely affected by earthquake disasters in the world. [0003] The research and application of vibration control in civil engineering structures is considered to be a major breakthrough in the field of structural wind and seismic research. It breaks through the traditional structural design method, even if it only relies on changing the per...

AI Technical Summary

Problems solved by technology

However, there are two major problems with TMD: first, only when the natural vibration frequency of TMD is the same as or close to the natural frequency of the structure itself, the vibration control effect of TMD will reach the best state. The reason or the influence of the external environment will cause the natural frequency of the TMD to not reach the expected state, resulting in detuning

At the same time, TMD can only suppress vibration within a limited frequency bandwidth, which is not effective for near-field earthquakes; second, the stroke of the TMD mass block is too large, and it is easy to collide with the upper structure when the mass block is tuned for vibration reduction. Influenced the application of practical engineering

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