针对影响海岛风浪互补电站产业化进程的选址决策问题,本文构建选址决策模型并提出求解算法,从而建立海岛风浪互补电站选址决策方法。本文构建海岛风浪互补电站选址决策模型并提出求解算法,从而建立海岛风浪互补电站选址决策方法。在权...针对影响海岛风浪互补电站产业化进程的选址决策问题,本文构建选址决策模型并提出求解算法,从而建立海岛风浪互补电站选址决策方法。本文构建海岛风浪互补电站选址决策模型并提出求解算法,从而建立海岛风浪互补电站选址决策方法。在权重求解算法中结合集体决策理论提出基于熵值法和特征向量法的组合权重法,有效降低传统主观赋权法的主观偏差。方案排序算法应用接近理想点法(Technique for Order Preference by Similarity to an Ideal Solution,TOPSIS)得出优先开发序列,确定最优场址。最后,以青岛市海岛风浪互补电站选址为例通过敏感性分析论证方法的鲁棒性、实用性与科学性。海岛风浪互补电站选址决策方法可以为中国海洋能电站微观选址提供理论支撑,推进中国海洋能的产业化进程。展开更多
Damping is critical for the roll motion response of a ship in waves. A common method for the assessment of damping in a ship’s rolling motion is to perform a free-decay experiment in calm water. In this paper, we pro...Damping is critical for the roll motion response of a ship in waves. A common method for the assessment of damping in a ship’s rolling motion is to perform a free-decay experiment in calm water. In this paper, we propose an approach for estimating nonlinear damping that involves a linear exponential analytical approximation of the experimental roll free-decay amplitudes, fol- lowed by parametric identification based on the asymptotic method. The restoring moment can be strongly nonlinear. To validate this method, we first analyzed numerically simulated roll free-decay data using rolling equations with two alternative parametric forms: linear-plus-quadratic and linear-plus-cubic damping. By doing so, we obtained accurate estimates of nonlinear damping coefficients, even for large initial roll amplitudes. Then, we applied the proposed method to real free-decay data obtained from a scale model of a bulk barrier, and found the simulated results to be in good agreement with the experimental data. Using only free-decay peak data, the proposed method can be used to estimate nonlinear roll-damping coefficients for conditions with a strongly nonlinear restoring moment and large initial roll amplitudes.展开更多
文摘针对影响海岛风浪互补电站产业化进程的选址决策问题,本文构建选址决策模型并提出求解算法,从而建立海岛风浪互补电站选址决策方法。本文构建海岛风浪互补电站选址决策模型并提出求解算法,从而建立海岛风浪互补电站选址决策方法。在权重求解算法中结合集体决策理论提出基于熵值法和特征向量法的组合权重法,有效降低传统主观赋权法的主观偏差。方案排序算法应用接近理想点法(Technique for Order Preference by Similarity to an Ideal Solution,TOPSIS)得出优先开发序列,确定最优场址。最后,以青岛市海岛风浪互补电站选址为例通过敏感性分析论证方法的鲁棒性、实用性与科学性。海岛风浪互补电站选址决策方法可以为中国海洋能电站微观选址提供理论支撑,推进中国海洋能的产业化进程。
基金support from the National Natural Science Foundation of China (No. 5160 9224)the Major Program of National Natural Science Foundation of China (No. 51490675)the Fundamental Research Funds for the Central Universities (No. 201513056)
文摘Damping is critical for the roll motion response of a ship in waves. A common method for the assessment of damping in a ship’s rolling motion is to perform a free-decay experiment in calm water. In this paper, we propose an approach for estimating nonlinear damping that involves a linear exponential analytical approximation of the experimental roll free-decay amplitudes, fol- lowed by parametric identification based on the asymptotic method. The restoring moment can be strongly nonlinear. To validate this method, we first analyzed numerically simulated roll free-decay data using rolling equations with two alternative parametric forms: linear-plus-quadratic and linear-plus-cubic damping. By doing so, we obtained accurate estimates of nonlinear damping coefficients, even for large initial roll amplitudes. Then, we applied the proposed method to real free-decay data obtained from a scale model of a bulk barrier, and found the simulated results to be in good agreement with the experimental data. Using only free-decay peak data, the proposed method can be used to estimate nonlinear roll-damping coefficients for conditions with a strongly nonlinear restoring moment and large initial roll amplitudes.
