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随着经济和社会的发展,人类面临能源需求和环境污染的双重挑战,发展可再生能源产业
已成为世界各国的共识。波浪能作为一种重要的海洋可再生能源,分布广泛,储量丰富,具有 可观的应用前景。波浪能装置的能量转换效率是波浪能规模化利用的关键问题之一。
图 1 为一种波浪能装置示意图,由浮子、振子、中轴以及能量输出系统( PTO ,包括弹簧 和阻尼器)构成,其中振子、中轴及 PTO
被密封在浮子内部;浮子由质量均匀分布的圆柱壳体 和圆锥壳体组成;两壳体连接部分有一个隔层,作为安装中轴的支撑面;振子是穿在中轴上的 圆柱体,通过 PTO
系统与中轴底座连接。在波浪的作用下,浮子运动并带动振子运动(参见附 件 1 和附件 2 ),通过两者的相对运动驱动阻尼器做功,并将所做的功作为能量输出。考虑海
水是无粘及无旋的,浮子在线性周期微幅波作用下会受到波浪激励力(矩)、附加惯性力(矩)、
兴波阻尼力(矩)和静水恢复力(矩)。在分析下面问题时,忽略中轴、底座、隔层及 PTO 的 质量和各种摩擦。 问题1:
这是一个典型的动力学问题,建立动力学模型,对于写过动力学的同学比较容易,适合选择这个题目,建模的时候注意选择好计算坐标系,然后建立动力学模型,求解的话simulink或者matlab的ode45函数都可以
问题2 这是一个最优化的问题,最优化的问题算法比较成熟,粒子群、遗传算法、灰狼、还有其他的很多优化算法,看看知网都能够找到一些算法, 问题3
题目3在问题1上面升级了困难,增加了自由度,但本质上也是一个动力学建模问题 问题4 依旧是个最优化问题,这个比较好做,难点在于定义好优化目标,