摘要
针对某发动机开发过程中出现的薄壁件结构振动及噪声较大的问题,应用有限元、多体动力学相关软件,对发动机表面振动水平进行评估。通过发动机弱点分析,确定优化方向,进行缸盖罩、正时罩和机油盘三大薄壁件结构优化,最终得到合格的优化样机。台架试验验证结果证明了仿真优化方案的合理性,同时,优化后发动机达到了开发目标。
In order to fulfill the vibration targets of the engine system with good NVH performance,the numerical simulation of the whole system is carried out by simulation software which is based on finite element method and multi-body dynamic method respectively.By means of baseline analysis,the structural weak points on head cover,timing cover and oil-pan are found.Some possible opproaches potential are decided.After optimizations the final engine status is obtained.Test results of optimized prototype meet the acoustic targets and prove the reliability of numerical simulation as well.
出处
《振动工程学报》
EI
CSCD
北大核心
2010年第6期687-697,共11页
Journal of Vibration Engineering
关键词
发动机
振动
噪声
结构优化
engine
vibration
noise
structural optimization
