摘要
以某国产SUV车架为研究对象,建立车架有限元模型,对车架进行弯曲、扭转刚度分析,并进行模态分析和模态试验,验证模型的有效性。利用正交试验法确定材料轻量化部件,并将这些部件的钢材料替换成铝合金,得到钢铝复合轻量化车架。针对钢铝复合车架刚度和模态性能的减弱问题,采用折衷规划法的多目标形貌优化对部件进行优化改进,提高车架的刚度和模态性能。研究结果表明,采用正交试验结合多目标形貌优化法得到的新车架在质量减轻6.7kg的同时提高了刚度和模态性能,达到了良好的轻量化设计效果。
To take an SUV frame as research subject, the finite element model was established, the bending, torsional stiffness and modal were analyzed, and the modal value with the testing vale was compared in order to ensure the model＇ effectiveness. Using the orthogonal test method to determine the lightweight components, and the steel material for SUV frame was replaced by aluminum alloy so as to get the steel-aluminum composite lightweight frame. Then compromise programming multi-objective morphology optimization design method was adopted to improve the stiffness and modal property. The results showed that the new frame mass reduced about 6.7 kg altogether after using the orthogonal test and morphology optimization, meanwhile the stiffness and modal property was enhanced.
出处
《机械科学与技术》
CSCD
北大核心
2014年第10期1555-1561,共7页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金项目(50645032)
江西省科技攻关计划项目(C0202400)资助
关键词
正交试验
钢铝复合车架
折衷规划
形貌优化
轻量化
aluminum alloys
compromise programming
efficiency
experiments
finite element method
hghtweight
mathematical models
optimization
optimizationmesh generation
morphology
orthogonal test
steel-aluminiumoptimization
morphology
multiobjectivecomposite frame
stiffness
