Experimental Study On Vibration Reduction Performance Of Compound Damping Cables

Many high-rise structures play an important role in the national economy.The high-rise structure is difficult to be controlled under the existing structural vibration control technology,due to flexibility,low damping,easily under the action of strong winds occurred in a substantial vibration or even collapse,In order to apply the damper to the structure of the vibration control technology in the high structure.This paper studies a compound damping cable composed of an assistant cable,a main cable,a boom,a reset spring and a damper,which connects the structure to the ground and uses the main cable to fully transfer the vibration displacement of the tall structure to the damper,the use of existing dampers vibration reduction technology to achieve the high-rise structure of the vibration.Due to the compound damping cable directly using the vibration of the high-rise structure drive dampers for vibration energy dissipation,can achieve high-rise structure of low-frequency,multi-mode vibration control.For the long compound damping cable,the damping effect of the high-rise structure is influenced by many factors.Compared with the existing damper Vibration reduction technology the motion mechanism of the compound damping cable is complex and needs to be studied.This project research on the effect of the interaction between the structure-the damper-the reset spring-the cable on the vibration reduction effect,and the influence of multiple key parameters on the vibration control of the high-rise structure is revealed.1.Details of the composite damping cable structure design and working principle,and the establishment of a simple mechanical model.The feasibility and effectiveness of the composite damping cable are theoretically explained.2.Using MATLAB to establish the algorithm to improve the cable string stiffness,using the dichotomy and the influence matrix to calculate the force required for each support point to ensure that the main cableline into a straight line state,rapid realization of the main cable hanging point and the two ends of the anchor point in the same line can,in a wide range of rapid search for accurate range,not subject to nonlinear deformation,greatly improve the chord stiffness.3.The numerical simulation shows that under the action of smaller tension,the long cable is larger and has a small chordwise stiffness.The elastic suspension is carried out at the midpoint of the cable.Under the same axial tension,The chordwise stiffness of the main cable is remarkably improved and close to the axial stiffness of the straight cable.4.The composite damping cable under the action of small tension is obtained by the multi-point elastic suspension,the chord stiffness of the main cable is obtained,and thechord stiffness of the main cable is used to simulate the vibration of the high-The vibration of the tall structure is simulated by the model tower,and the damping effect of the damping cable is studied.The damping effect of the damping cable is studied.