广西科技大学学报2025，Vol.36Issue(6)：17-25,9.DOI:10.16375/j.cnki.cn45-1395/t.2025.06.003
大功率柴油机气缸套应力应变分析研究
Stress and strain analysis of cylinder liners in high-power diesel engines
摘要
Abstract
To investigate the stress-strain differences between new and used diesel engine cylinder liners,this study employed a metallographic microscope for a comparative analysis of their microstructural organization and utilized the ANSYS platform for finite element comparative studies on their mechanical properties under multiple operating conditions.A thermo-mechanical coupling model was constructed to systematically analyze temperature distribution,mechanical loads under average firing pressure and maximum lateral pressure as well as stress-strain behavior under thermal stress conditions during operation.The metallographic analysis revealed that the used liner featured a graphite morphology combining 70%type A graphite and 30%type D/E graphite,with a graphite length of grade 3,while the new liner exhibited 90%type A graphite and a shorter grade 4 graphite length.The new liner also demonstrated a higher graphite density and more uniform distribution per unit area.Simulation results showed similar temperature field distributions between the two liners,with localized differences only around cooling water holes.Under average firing pressure,peak tensile stresses at the top were 71.984 MPa(used)and 71.797 MPa(new),while under maximum lateral pressure,stress distributions were nearly identical.Thermo-mechanical coupling analysis indicated maximum deformation at the bottom for both liners,but significant stress disparities at the flange:493.670 MPa(used)vs 255.800 MPa(new).This highlights material degradation in the flange region after long-term use as a critical failure risk area.关键词
晶相组织/大功率柴油机气缸套/最大爆发压力/最大侧压力/应力分析Key words
metallographic structure/high-power diesel engine cylinder liner/maximum firing pressure/maximum lateral pressure/stress analysis分类
能源科技引用本文复制引用
黄红生,李润泽,莫清烈,吴宛珊,姜峰..大功率柴油机气缸套应力应变分析研究[J].广西科技大学学报,2025,36(6):17-25,9.基金项目
广西科技重大专项(桂科AA24206064) （桂科AA24206064）
广西重点研发计划项目(桂科AB25069449,桂科AB24010298,桂科AB24010293)资助 （桂科AB25069449,桂科AB24010298,桂科AB24010293）
