汽车发动机的节能减排技术分析

当前全球变暖等环境问题越来越严重,以至于各个国家都将节能环保力度逐步加大,其中能源消耗问题、环境污染问题、气候变化问题等,对汽车产业带来的压力是巨大的。所以,需要全面实施节能减排计划。因此,本文针对汽车发动机的节能减排技术做出了进一步探究。     

燃料电池电动汽车能量管理系统研究

提出多能源燃料电池加镍氢电池及超级电容燃料电池电动汽车混合动力系统的方案,并设计了动力系统结构。通过比较车载3种能源,给出了动力总成控制系统结构,重点对能量管理系统进行优化,采取燃料电池发动机输出功率预测控制策略,减少了其输出功率的频繁波动。仿真结果证明能量管理策略可行。     

基于微型车吸能结构改进的约束系统最优化分析

针对缩短微型车前纵梁长度的结构改进,采用MADYMO动力学分析软件对微型车目标碰撞加速度曲线、驾驶员约束系统和损伤指标进行了分析研究。以改进结构后的碰撞加速度曲线为基础进行了约束系统的参数分析,包括安全带安装位置、安全带刚度、卷收器特性、座椅刚度和转向盘的位置等,利用MADYM IZER对所选参数进行了最优化分析。研究结果表明:约束系统分析可以有效地辅助吸能结构改进,且在改进吸能结构碰撞加速度曲线后通过调整约束系统参数实现对驾驶员的良好保护。     

山东港航节能减排见成效

从3个方面介绍了山东港航为做好节能减排工作的经验,包括政府部门加强管理,企业努力创新,行业协会配合、协调,从而工作取得显著成效。     

港口散货堆场带式输送机减电机运行节能技术研究

港口煤炭、矿石等散货堆场用带式输送机经常在轻载下运行,输送机所需要的传动功率较低,出现严重的“大马拉小车”现象,导致其电动机能耗较高,系统功率因数较低。在分析研究堆场带式输送机减电机节能运行的关键技术的基础上,编制了输送机减电机运行计算软件,提出了堆场带式输送机减电机运行的合理建议。     

Ice impact response and energy dissipation characteristics of PVC foam core sandwich plates: Experimental and numerical study

In this paper, the dynamic responses and energy dissipation characteristics of polyvinyl chloride (PVC) foam core sandwich plates under ice impact are investigated. The ice impact tests of PVC foam core sandwich plates were conducted by employing the horizontal impact experimental apparatus. The finite element simulations were conducted to analyze the dynamic response of PVC foam core sandwich plates based on soil and concrete material model for ice impactor. It was demonstrated that numerical results were in good agreement with experimental results. The deformation modes of the top facesheets were coupling of local indentation with global bending deformation, while the deformation modes of bottom facesheets were overall bending deformation. The permanent deformation of face sheets show that the impact resistance of sandwich plate is better than that of equivalent weight hull plate (EWHP). In addition, based on the actual navigation environment of ship, the effect of impact angle and ice floe shape on dynamic response and energy dissipation are analyzed.