海洋波力发电倒置摆系统的非线性振动实验研究

Experimental research on nonlinear vibration of an inverted pendulum for ocean wave power generation

以振动基座上的倒置摆系统为研究对象,对该系统受竖向简谐激励作用时的非线性振动特性进行实验研究,探讨该系统应用于海洋波力发电的技术可行性,为海洋波力开发利用提供依据。实验设计倒置摆转动角位移采集系统,通过测试确定系统的阻尼、固有频率等,为数值模拟提供依据并指导倒置摆系统的振动实验。通过实测振动时域数据得到系统振动频谱及相图,证明该系统存在大阻尼条件下的大周期运动、共振状态下的周期振动和倒置摆稳定吸引域,这表明该模型具有海浪波力能源吸收好,消耗少的特点,同时表明该模型具有高效的动力输出能力。因此,振动基座上倒置摆模型在开发利用海洋波力能源发电中具有十分重要的应用前景。

The nonlinear characteristics of a device of an inverted pendulum fixed on a vibration base under vertical simple harmonic excitation were studied experimentally.The technical feasibility of the application of the system in ocean wave power generation was discussed,which provides experimental evidence for power generation by ocean wave.The angular displacement collection system of the pendulum was designed.The damping and natural frequency were measured,which provide a basis for numerical simulation and guiding vibration experiment on the inverted pendulum under parametric excitation.The vibration spectrum and phase diagram of the inverted pendulum system were obtained by measuring the time domain data,which show that large periodic rotation,periodic rotation under resonance and stable vibration exist in the motion of the inverted pendulum under parametric excitation.The model has the characteristic of good capability of absorbing ocean wave power energy with low consumption.So,the inverted pendulum model for ocean wave power generation has important application prospect.