危化品罐车在制动工况下的结构强度和疲劳寿命分析  

Structural Strength and Fatigue Life Analysis of Hazardous Chemical Tank Trucks under Braking Conditions

作　　者：顾永兵 马立新 韩小燕 曹艺超 丁文捷[2] Gu Yongbing;Ma Lixin;Han Xiaoyan

机构地区：[1]宁夏特种设备检验检测院 [2]宁夏大学机械工程学院,宁夏银川市750021

出　　处：《工程机械》2024年第11期106-113,I0025,I0026,共10页Construction Machinery and Equipment

基　　金：宁夏自然科学基金(2023AAC03736)。

摘　　要：对某特检院检验的危化品罐车在普遍制动工况0.5g减速度下进行强度和疲劳寿命的分析,旨在评估罐体结构的安全性和耐久性。借助三维建模软件和有限元流-固耦合,研究罐车关键部件前封头、防波板和后封头的强度特性,在此基础上分析了其在冲击载荷下的疲劳寿命。研究结果显示,在冲击载荷下,最大应力出现在靠近封头的防波板上端流通孔的右侧,最大应力值为35.142 MPa,同时该位置的变形最大,达到2.88 mm。此外,发现疲劳损伤最大的位置在靠近封头的防波板卸液孔处,并据此计算了整车的疲劳寿命。基于相关研究结果,为危化品罐车罐体的结构设计和管理策略提出了一些建议。The strength and fatigue life of a hazardous chemical tank truck inspected by a special equipment inspection institute are analyzed under a normal braking condition of 0.5g deceleration to evaluate the safety and durability of the tank structure.With the help of three-dimensional modelling software and finite element flow-structure interaction,the strength characteristics of the key components of the tank truck,including the front head,baffle and rear head,are studied,and on this basis,the fatigue life under impact loads is analyzed.The research results show that under impact loads,the maximum stress appears at the right side of the upper flow hole of the baffle near the head,with a value of 35.142 MPa,and the deformation at this position is the largest,which reaches 2.88 mm.In addition,it is found that the fatigue damage is the greatest at the discharge hole of the baffle near the head,and the fatigue life of the entire truck is calculated accordingly.Based on relevant research results,some suggestions are made for the structural design and management strategies of the tank of hazardous chemical tank trucks.

关 键 词：罐车罐体 有限元分析 强度分析 疲劳寿命 结构设计 

分 类 号：U469.61[机械工程—车辆工程]