Flow-induced vibration energy collection-based nonlinear vibration system

A technology of vibration energy collection and nonlinear vibration, which is applied in vibration testing, measuring devices, testing of machine/structural components, etc., to achieve accurate and good experimental results, convenient use, and moderate cost

Inactive Publication Date: 2019-06-14
HARBIN ENG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a nonlinear vibration system based on flow-induced vibration energy harve

Method used

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  • Flow-induced vibration energy collection-based nonlinear vibration system
  • Flow-induced vibration energy collection-based nonlinear vibration system
  • Flow-induced vibration energy collection-based nonlinear vibration system

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Embodiment Construction

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] The purpose of the present invention is to disclose a nonlinear vibrator system based on flow-induced vibration energy harvesting, which is suitable for energy harvesting of vortex-induced vibration at low flow rates. The system can adjust the system spring stiffness according to the flow rate to maximize the energy collection efficiency

[0029] The system mainly includes two parts, the mechanical vibration system and the Vck system, and its characteristic is that the spring stiffness of the system can be automatically adjusted according to the flow rate.

[0030] The system mainly includes the following two parts:

[0031] (1) Vck system Vck (virtual spring–damping system virtual spring damping system) is mainly composed of servo motors, servo amplifiers, main control boards, flow rate sensors, wires and other components. T...

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Abstract

The invention provides a flow-induced vibration energy collection-based nonlinear vibration system. The system comprises a vibration experiment device and a Vck system connected with a vibration experiment system, wherein the Vck system comprises a servo motor, a servo motor amplifier, a main control panel and a flow velocity sensor; the servo motor converts the rotation speed and torque of a rotation shaft into voltage signals and transfers the voltage signals to the main control panel; the main control panel adjusts extra damp of the system and transmits the signals to the servo amplifier; the servo amplifier amplifies the signals and feeds back the signals to the servo motor, so as to adjust damp of the system; and the flow velocity sensor is connected with the main control panel and transfers the flow velocity information to the main control panel. The system is convenient to use, moderate in cost and modularized in design; and after debugging, experiment ca be carried out on a plurality of modules, so that relatively accurate and favorable experiment effect can be achieved. The system is improvement of original linear spring rigidity vibration subsystems, and is capable of overcoming the defect that the original systems cannot completely simulate the viscosity damp of the systems so that the experiment is closer to the practical condition.

Description

technical field [0001] The invention relates to a nonlinear vibration system, in particular to a nonlinear vibration system based on flow-induced vibration energy collection, which belongs to the field of new energy sources. Background technique [0002] At present, the main research object of VIV research is the cylindrical vibrator with linear spring stiffness. The research shows that the natural frequency of the vibrator is an important parameter based on the flow-induced vibration energy system, which will greatly affect the segmental range of the upper branch of VIV and the The frequency of the oscillator in the galloping phase, but does not change the galloping excitation velocity. As the natural frequency increases, the Reynolds number / flow velocity of the initial branch of the vibrator will increase, and the high spring stiffness will have a smaller amplitude than the low stiffness; in the upper branch stage (high energy collection stage), the high spring stiffness / n...

Claims

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Application Information

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IPC IPC(8): G01M7/02
Inventor 孙海陈芝赟孙丽萍
Owner HARBIN ENG UNIV
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