摘要
从汽车发动机降噪的角度出发,选择缸盖罩作为主要分析对象,采用了ANSYS和Virtual.Lab联合仿真的方法,以ANSYS Workbench中所算得的瞬态响应的结果作为速度边界条件,用间接边界元法计算了其振动所产生的辐射噪声,确定了结构优化的方向。通过增加部件和局部加厚相结合的方法,最终使得声功率级降低了3.5 dB(A),达到了减振降噪的目的。
In this paper,the cylinder cover is selected as the main analysis object from the angle of noise reduction of automobile engine,and the combined simulation method of ANSYS and Virtual.Lab is adopted.The corresponding result of the transient state calculated in ANSYS Workbench is used as the speed boundary condition.The radiation noise generated by vibration is calculated by indirect boundary element method,and the direction of structure optimization is determined.By adding components and local thickening,the sound power level is reduced by 3.5 dB(A),which achieves the purpose of vibration reduction and noise reduction.
作者
丁瑞
李舜酩
张凯成
DING Rui;LI Shunming;ZHANG Kaicheng(College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
出处
《重庆理工大学学报（自然科学）》
CAS
北大核心
2020年第3期80-88,共9页
Journal of Chongqing University of Technology：Natural Science
基金
国家重点研究和发展项目“新型节能环保农用发动机开发”(2016YFD0700800)
国家自然科学基金资助项目(51675262)。
关键词
缸盖罩
瞬态分析
边界元
改变结构
cylinder cover
modal analysis
transient analysis
boundary element
