摘要：针对某商用车前保险杠出现怠速工况振动过大的问题,运用振动测试与CAE仿真分析相结合的方法,确定保险杆固有频率与发动机怠速工况下的点火频率接近是引起前保险杠抖动的根本原因.运用振动理论,提出在保险杠与车架连接处增加支架、支撑杆的刚度增强方案,并利用CAE进行改进前后仿真分析.结果表明:优化后保险杠的固有频率提高了6Hz以上,现场实车测试表明,改进设计方案可行,有效解决了保险杠怠速工况下的抖动问题.

摘要：在新能源汽车行业迅猛发展的背景下,深入理解新能源汽车的原理与构造显得尤为关键。本文在智慧教育背景下构建《新能源汽车原理与构造》课程的知识图谱,并探讨其在教学实践中的应用价值,分析了新能源汽车行业的发展态势及知识图谱构建的必要性。详细介绍了知识图谱的构建思路,涵盖课程框架设计、知识点分解重构和知识点资源库建设。探讨了知识图谱在课堂教学中的辅助教学、个性化学习推荐以及课程内容的可视化展示。In the context of the rapid development of the new energy vehicle industry, a deep understanding of the principles and construction of new energy vehicles is particularly crucial. This paper constructs a knowledge graph for the “Principles and Construction of New Energy Vehicles” course within the framework of smart education and discusses its application value in teaching practice. It analyzes the development trends of the new energy vehicle industry and the necessity of constructing a knowledge graph. The paper provides a detailed introduction to the thought process of constructing the knowledge graph, which involves course framework design, decomposition and reconstruction of knowledge points, and the construction of a knowledge point resource library. It also explores the role of the knowledge graph in auxiliary teaching, personalized learning recommendations, and the visual presentation of course content in classroom instruction.

摘要：以南宁学院交通运输学院汽车服务工程专业学生为教学改革对象,针对“单片机应用技术”课程实行基于学科竞赛与“双创”融合式的人才培养策略。本次改革在授课计划中将以全国大学生智能汽车竞赛、“互联网+”大赛和机械创新设计大赛为依托,深度挖掘竞赛内容形成《单片机应用技术》课程的案例库,以项目式进行教学,案例项目紧跟竞赛主题。经过一学期的教学实践和期末考核,根据学生的考试情况和教学反映情况做出教学改革总结。实践证明,此教学改革法取得了较大的成效,为单片机课程教学提供了经验基础。Taking the students of Automobile Service Engineering major of the School of Transportation at Nanning University as the object of teaching reform and implementing the talent cultivation strategy based on the fusion of disciplinary competitions and “Double Creation” for the course of “Microcontroller Application Technology”. This reform will be based on the National College Students' Intelligent Vehicle Competition, “Internet+” Competition and Mechanical Innovation Design Competition as the basis of the teaching plan in the course, and the contents of these competitions will be mined in depth to form the case base of the course “Microcontroller Application Technology”, which will be taught in the form of a project, and the case projects will closely follow the themes of the competitions. After a semester of teaching practice and a final examination, the summary of teaching reform is made according to the students’ examination and teaching reflection. Practice has proved that this teaching reform method has achieved great results, providing an experience base for teaching microcontroller courses.

摘要：在电动汽车底盘布置优化设计中,我们需要考虑的因素不止动力电池组的布置还要考虑操纵性、稳定性、平顺性等整车综合性能。而设计出合理理想的底盘布置优化方案,对电动汽车未来的发展具有深远的意义。针对以上的问题,本文提出通过ADAMS Car仿真模型建立不同电动汽车底盘布置,基于国家标准和评价方法进行仿真试验,对不同的底盘布局方案的试验进行对比,确定对于整车操纵性、稳定性、平顺性更理想合理的底盘设计方案,通过仿真结果分析,验证优化结果。

摘要：以首次采用“地连墙-混凝土承台”复合基础的世界最大跨径(575 m)钢管混凝土拱桥——平南三桥北岸拱座基础为工程依托,同时提出了2种新型的格构式地连墙拱座基础形式,采用数值分析方法对3种形式基础在运营期拱座上部荷载作用下的变形、承载性能进行对比分析,同时从施工工艺、耗材、工期等方面对3种不同形式基础的适用性进行讨论。结果表明:拱座上部荷载作用下3种形式的基础均呈现整体式倾倒变形,环形基础的水平承载性能较其他2种新型格构式筒型地连墙基础更优,而新型基础1的竖向承载性能优于其他2种基础形式;在确保基础的整体性及刚度的情况下,新型基础1较其他2种基础形式更具竞争力。

摘要：为解决调度集中系统本地数据管理性能开销大、数据处理效率低下等问题,引入SQLite数据库研究数据管理的高效方式。通过在调度集中系统软件架构的本地数据管理组件中运用SQLite数据库设计数据访问接口,实现本地数据的增加、删除、修改、查询操作,以及操作事务管理机制、异常处理机制。为验证SQLite数据访问接口性能,以调度集中系统的阶段计划和调度命令正文为数据对象,设置大数据量测试的验证场景。试验结果表明,SQLite数据访问接口进行本地数据增、删、改、查的操作耗时下降到传统XML文件访问方式的8%~17%,验证了SQLite数据访问接口在处理大量调度集中系统业务数据时的可用性和高效性,对于维持调度集中系统高效稳定运行和降低系统负载具有重要意义。