舰船刚性阻振质量复合托板隔振特性优化设计(英文)

In considering the theory of structural dynamic optimization design, a design method of the structural style of ship composite brace with rigid vibration isolation mass was studied. Two kinds of structural dynamic optimization formulations minimizing the vibration acceleration of the non-pressure hull on the restraining condition of the gross weight of the ship cabin were established: 1) dynamic optimization of the sectional dimensions of the rigid vibration isolation mass in the composite brace; 2) dynamic optimization of the arranging position of the rigid vibration isolation mass. Through the optimization results, sectional dimensions and the arranging position of the rigid vibration isolation mass with better performance in reducing vibration were gained, and some reference was provided for practical engineering designs as well as enrichment of the design method of a novel ship vibration-isolation brace.     

新能源汽车综合经济性对比分析及预测研究EI北大核心CSCD

传统车辆经济性对比分析方法受车辆配置、大小、质量等因素影响,容易得出普通车辆经济性远高于豪华车辆的结论。为了对新能源汽车和传统燃油汽车的综合经济性进行深入客观的对比分析研究,本文中建立了一套搭载不同动力系统车辆的综合经济性预测模型,并基于该模型进行了新能源汽车(纯电动和燃料电池商用车)与传统燃油汽车的综合经济性对比分析及预测研究,从车辆的不同续驶里程和质量两个维度要求考虑,建立了搭载不同动力系统车辆的成本预测模型,并对纯电动汽车、燃料电池汽车、传统燃油汽车在当下、2025年、2030年、2035年的动力系统成本和全生命周期使用成本进行数据计算和经济性预测。预测结果表明:未来纯电动汽车和燃料电池汽车动力系统成本和全生命周期成本将会进一步下降,甚至会逐步优于传统燃油汽车;燃料电池汽车成本下降速度更快,在长续驶里程和高重载条件要求下,燃料电池商用车的全生命周期成本将逐步低于同类型传统燃油汽车和纯电动汽车,建议我国优先发展对续驶里程要求较长的重型商用车。