Based on the modified mixed Hellinger-Reissner（H-R） variational principle for elastic bodies with damping, the state-vector equation with parameters is directionally derived from the principle. A new solution for th...Based on the modified mixed Hellinger-Reissner（H-R） variational principle for elastic bodies with damping, the state-vector equation with parameters is directionally derived from the principle. A new solution for the harmonic vibration of simply supported rectangular laminates with damping is proposed by using the precise integration method and Muller method. The general solutions for the free vibration of underdamping, critical damp and overdamping of composite laminates are given simply in terms of the linear damping vibration theory. The effect of viscous damping force on the vibration of composite laminates is investigated through numerical examples. The state-vector equation theory and its application areas are extended.展开更多
以分布式能源站(distributed energy station,DES)为核心的综合能源系统已成为未来发展方向,合理地评价DES健康状态能有效促进其安全稳定运行。为实现DES健康状态的准确评价和全局观测,提出基于前景理论和参考值变换的分布式能源站健康...以分布式能源站(distributed energy station,DES)为核心的综合能源系统已成为未来发展方向,合理地评价DES健康状态能有效促进其安全稳定运行。为实现DES健康状态的准确评价和全局观测,提出基于前景理论和参考值变换的分布式能源站健康状态矢量动态评价方法。首先,考虑DES低碳运行和健康状态评价需求,构建包含低碳运行、供能可靠、系统健康、设备健康维度的DES健康状态评价体系。考虑了指标重要度、贡献度、差异度和灵敏度多重特性,运用博弈论思想将多特性权重融合。其次,考虑健康状态评价不同特点,引入前景理论和参考值思想对评价值变换过程进行改进。通过灰色-优劣解距离法评价模型确定DES健康状态正、负关联度,从而得到健康状态矢量。同时,利用时间权向量和时间维度解决动态评价与全局观测的问题。最后,通过算例验证所提评价方法的科学性与健康状态评价的有效性,将其与传统方法进行对比分析,结果表明该方法在健康度评价方面有更好的效果。展开更多
文摘Based on the modified mixed Hellinger-Reissner（H-R） variational principle for elastic bodies with damping, the state-vector equation with parameters is directionally derived from the principle. A new solution for the harmonic vibration of simply supported rectangular laminates with damping is proposed by using the precise integration method and Muller method. The general solutions for the free vibration of underdamping, critical damp and overdamping of composite laminates are given simply in terms of the linear damping vibration theory. The effect of viscous damping force on the vibration of composite laminates is investigated through numerical examples. The state-vector equation theory and its application areas are extended.
文摘以分布式能源站(distributed energy station,DES)为核心的综合能源系统已成为未来发展方向,合理地评价DES健康状态能有效促进其安全稳定运行。为实现DES健康状态的准确评价和全局观测,提出基于前景理论和参考值变换的分布式能源站健康状态矢量动态评价方法。首先,考虑DES低碳运行和健康状态评价需求,构建包含低碳运行、供能可靠、系统健康、设备健康维度的DES健康状态评价体系。考虑了指标重要度、贡献度、差异度和灵敏度多重特性,运用博弈论思想将多特性权重融合。其次,考虑健康状态评价不同特点,引入前景理论和参考值思想对评价值变换过程进行改进。通过灰色-优劣解距离法评价模型确定DES健康状态正、负关联度,从而得到健康状态矢量。同时,利用时间权向量和时间维度解决动态评价与全局观测的问题。最后,通过算例验证所提评价方法的科学性与健康状态评价的有效性,将其与传统方法进行对比分析,结果表明该方法在健康度评价方面有更好的效果。
