Low-damping ratio flow-induced vibration experimental device based on electronic spring

Abstract

The invention provides a low-damping ratio flow-induced vibration experimental device based on an electronic spring. The device comprises a cylindrical vibrator, a slider, a slide rail, a timing beltand timing belt conveying wheels. Upper and lower ends of the slide rail are fixedly connected. Both ends of the cylindrical vibrator are connected with the slider. The slider matches the slide rail.Timing belt conveying wheels are arranged above and below the slide rail. The timing belt conveying wheels match the timing belt. Both ends of the slider are connected with the timing belt. A transmission wheel on the upper side of the slide rail is connected with the rotating shaft of the cylindrical vibrator. The rotating shaft is connected with a Vck system. The shortcomings that a traditionalflow-induced vibration experimental device is difficult to change physical springs and damping and cannot completely simulate the linear viscous damping of a system are overcome. An experiment can change parameters accurately and quickly, and acquired experimental data are more reliable.

Description

technical field [0001] The invention relates to an experimental device, in particular to an electronic spring-based low damping ratio flow-induced vibration experimental device, which belongs to the field of new energy sources. Background technique [0002] In the early VIVACE systems of the Marine Renewable Energy Lab (MRELab), physical springs and mechanical dampers were used. However, the vibrator will have a large energy loss in order to overcome the resistance, so the system damping must be minimized to obtain higher energy. Foreign countries have tried to use electronic components instead of solid springs and dampers. One of the representatives is VCTA (MIT). The equipment uses feedback control and real-time measurement and calculation of vortex-induced hydrodynamic forces; but in actual operation, VCTA is relatively The spring-damper system has a phase lag of 12 degrees and 9 degrees; subsequent related equipment has the same problem. In order to meet the experiment...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a low damping ratio flow-induced vibration experimental device based on electronic springs in order to overcome the shortcomings of traditional flow-induced vibration experimental equipment, such as the difficulty of changing physical springs and damping, and the inability to completely simulate the linear viscous damping of the system.

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