SENSITIVITY OF A WAVE ENERGY CONVERTER DYNAMICS MODEL TO NONLINEAR HYDROSTATIC MODELS
SENSITIVITY OF A WAVE ENERGY CONVERTER DYNAMICS MODEL TO NONLINEAR HYDROSTATIC MODELS
复制标题
波能转换器动力学模型对非线性静水模型的敏感性
DOI：
10.1115/omae2015-41993
复制
发表时间：
2015
影响因子：
5
通讯作者：
D. Bull
中科院分区：
文献类型：
--
作者：
R. Coe;D. Bull
基于康明斯方程，建立了不规则截面轴对称点吸收式波浪能转换器的三维时域模型。该模型采用了一些非线性，以准确地考虑到装置的动力学：流体静力学恢复，运动约束，饱和的动力输出力，和运动学非线性。在这里，开发的流体静力学恢复反应的插值模型，并与基于表面积分的方法进行比较。这些非线性流体静力学模型对设备动态的影响进行了探讨，通过比较预测对那些线性模型。对于所研究的WEC，插值模型比线性模型有很大的改进，并且比基于表面积分的方法的计算成本低大约两个数量级。Copyright © 2015 by ASME
A three dimensional time-domain model, based on Cummins equation, has been developed for an axisymmetric point absorbing wave energy converter (WEC) with an irregular cross section. This model incorporates a number of nonlinearities to accurately account for the dynamics of the device: hydrostatic restoring, motion constraints, saturation of the power-take-off force, and kinematic nonlinearities. Here, an interpolation model of the hydrostatic restoring reaction is developed and compared with a surface integral based method. The effects of these nonlinear hydrostatic models on device dynamics are explored by comparing predictions against those of a linear model. For the studied WEC, the interpolation model offers a large improvement over a linear model and is roughly two orders-of-magnitude less computationally expensive than the surface integral based method.Copyright © 2015 by ASME