基于结构轻量化的城市客车车身生命周期评价  

Life Cycle Assessment of City Bus Body Based on Structural Lightweighting

作　　者：王童 杜轶群 陈轶嵩 韩日美 Wang Tong;Du Yiqun;Chen Yisong;Han Rimei(School of Automobile,Chang’an University,Xi’an 710064;International Education School,Chang’an University,Xi’an 710064;Xi’an Rail Transit Group,Xi’an 710021)

机构地区：[1]长安大学汽车学院,西安710064 [2]长安大学国际教育学院,西安710064 [3]西安轨道交通集团,西安710021

出　　处：《汽车工程》2022年第5期778-788,共11页Automotive Engineering

基　　金：国家重点研发计划(SQ2021YFE011519);国家自然科学基金(71173072);陕西省重点产业创新链项目(2020ZDLGY16-08);陕西省青年科技新星人才支持计划项目(S2021-0-ZC-XXXM-0059)资助。

摘　　要：为某12 m全承载混合动力城市客车建立车身有限元模型,通过强度、刚度、模态分析、结构轻量化和生命周期评价,分析车身结构优化对整车节能减排效果的影响。结果表明,与原车身骨架相比,结构优化后车身骨架质量减轻了52.5 kg,弯曲与极限扭转两种工况下均满足强度、刚度要求,且具有良好的固有振动特性。就全生命周期而言,轻量化后矿产资源消耗减少了0.4E04 kg Sb-eq.,化石能源消耗减少0.7E04 MJ,综合环境影响值减少0.42E11,减低率分别为3.81%、4.46%和4.56%。The finite element model for a 12 m monocoque hybrid power city bus is created and the effects of body structure optimization on the energy-saving and emission reduction of the bus are analyzed through strength,stiffness and modal analyses as well as structural lightweighting and life cycle assessment. The results show that compared with original body skeleton,the mass of structurally optimized body skeleton reduces by52.5 kg and both the strength and stiffness meet the requirements under bending and ultimate torsion conditions with a good natural vibration characteristic. As for the full life cycle,after lightweghting the mining resource consumption reduces by 0.4E04kg Sb-eq.,fossil energy resources consumption reduces by 0.7E04MJ and the overall environment influence factor reduces by 0.42E11,equivalent to a reduction rate of 3.81%,4.46% and 4.56% respectively.

关 键 词：客车 有限元分析 模态分析 轻量化分析 生命周期评价 

分 类 号：U463.82[机械工程—车辆工程]