基于多智能体的船舶区域配电网短路故障重构

多智能体技术及其在电力系统中的应用发展迅速,船舶电力系统故障工况下的多智能体重构提高船舶安全性成为研究的热点。文章在介绍了多智能体方法的基础上,结合船舶区域配电系统电网拓扑结构,运用复合型多智能体方法进行船舶区域配电网短路故障重构研究。在MATLAB/SimPowerSystem环境下,通过对船舶区域配电网三相接地短路故障时的复合型多智能体重构仿真与分析,表明复合型多智能体对于船舶区域配电网短路故障时的重构控制有效。     

超高强钢冷成形开裂分析理论的现状与发展

针对超高强钢冷成形开裂的理论分析与预测问题,归纳了现有理论模型的特点、适用范围及其在超高强钢成形断裂失效分析的应用现状,指出由于超高强钢的脆性化倾向导致其断裂分析存在的难点。基于超高强钢的材料特性及其准脆性断裂的本质,对成形开裂理论预测模型与数值模拟方法提出建议。     

基于Cruise的单级主减速器与两档位AMT模型仿真

文章以某款纯电动汽车为研究目标,采用Cruise软件分别搭建单级主减速器模型和两档位自动变速器(AMT)模型进行动力性和经济性仿真,结果表明在NEDC工况下两档位AMT模型能够改善整车经济性,但动力性相对较差。     

摩托车消声器辅助设计软件的研究与开发

介绍了一种摩托车消声器辅助设计软件——Muffler CAD的研究与开发，探讨了相关的一些问题。Muffler CAD能帮助设计人员完成摩托车消声器设计中的声学参数计算、数据查询、图形绘制等工作，建有全面的声学、摩托车消声器设计、噪声控制标准等资料库，提供了联机帮助功能。该软件对同类CAD软件的开发以及专业技术文档数字化，提供了一种具有参考价值的思路。     

Influence of high frequency vibration on deep drawing process of AZ31 sheet at room temperature

Quasi-ultrasonic vibration with a frequency of 15 kHz and a maximum output of 2 kW was imposed on the deep drawing process of AZ31 magnesium alloy sheet at room temperature, in order to reveal the effect of high frequency vibration on deformation behavior of AZ31 during the process. From the drawn results and the observation of the microstructure within the large deformation area, high frequency vibration has a great influence on the formability, the forming load and the failure mode of AZ31 sheet during the deep drawing process; the influence is a comprehensive result of so-called ??volume effect?? and ??surface effect??, and relies on the vibrating amplitude. Total forming load decreased significantly as soon as the vibration superimposed. According to the tensile test results of AZ31 bars under ultrasonic vibration, the formability of AZ31 sheet increases firstly with the increase of stimulating energy, then decreases and finally becomes brittle. Under the combined influence of ??surface effect?? and the ??softening?? in the ??volume effect?? near the relative low amplitude of 25%A in the experiment (A is the maximum amplitude), the formability of AZ31 reaches the largest value, and the samples possess the same distribution trend of cracks as those added with lubricating oil. With the increase of excitation energy, the ??volume effect?? gradually becomes apparent, and finally the ??hardening?? of the ??volume effect?? occupies a dominant position.