基于数值模拟技术的案例教学与科研实践--组合活塞轻量化及适度隔热研究  

Case teaching and research practice based on numerical simulation technology:Research on light-weight design and moderate insulation of composite piston

作　　者：刘雨薇[1] 李淳 程洁 陈浩 刘雯钦 张卫正[3] 原彦鹏[3] LIU Yuwei;LI Chun;CHENG Jie;CHEN Hao;LIU Wenqin;ZHANG Weizheng;YUANG Yanpeng(School of Mechanical Electronic&Information Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China;Beijing Benz Automotive Co.,Ltd.,Beijing 100176,China;School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]中国矿业大学(北京)机电与信息工程学院,北京100083 [2]北京奔驰汽车有限公司,北京100176 [3]北京理工大学机械与车辆学院,北京100081

出　　处：《实验技术与管理》2023年第11期183-190,共8页Experimental Technology and Management

基　　金：国家自然科学基金项目(52105232);教育部产学研协同育人项目(202101068002,202102122012);中国矿业大学(北京)研究生教育教学改革与研究项目(J220417);中国矿业大学(北京)大学生创新训练项目(202304079)。

摘　　要：以某高强化柴油机活塞为研究对象,采用拓扑优化方法和适度隔热技术来达到活塞的轻量化及隔热要求。将气隙隔热、陶瓷垫片隔热、组合活塞等隔热结构应用于经拓扑优化的铝合金活塞中。选取活塞顶部材料、顶部材料厚度、气隙半径和隔热片当量导热系数这4种主要影响因素进行正交实验设计和极差分析,确定影响活塞温度的显著性因素。采用满意度评价函数对各组合隔热方案进行满意度评估,从中筛选出最优方案,并对其进行热流分配分析和热应力计算。经过多学科协同教学和数值仿真训练,不仅促进了学生对专业知识的消化吸收,而且提升了学生的实践创新能力。Taking a highly strengthened diesel engine piston as the research object,the topology optimization and orthogonal test method are carried out to achieve the requirement for light weighting design and the heat flow control,respectively.The heat insulation structures which include the piston head with heat insulation material,air cavity and heat insulation pad are applied to the optimized topology piston.The significant influence factors for the temperature field are determined by orthogonal experiment and extreme difference analysis.In addition,a multi-objective optimization method is used to establish the overall heat flow evaluation model and each insulated composite piston is estimated.Then,the heat flux distribution and stress field are obtained using finite element analysis.Through the multi-disciplinary collaborative teaching and numerical simulation training,it not only promotes the students to digest and absorb professional knowledge,but also enhances their innovative thinking abilities.

关 键 词：组合隔热活塞 正交试验 热流分配 热应力 数值模拟教学 

分 类 号：TP273.4[自动化与计算机技术—检测技术与自动化装置]