Page 81 - 《应用声学》2020年第5期

第 39 卷 第 5 期 Vol. 39, No. 5
2020 年 9 月 Journal of Applied Acoustics September, 2020

⋄ 研究报告 ⋄

有限元-统计能量分析法的拖拉机驾驶室噪声研究 ∗

程科翔 马心坦 †

(河南科技大学车辆与交通工程学院 洛阳 471400)

摘要：为了解决拖拉机驾驶室中频噪声问题，基于有限元 -统计能量分析 (FE-SEA) 建立了某拖拉机驾驶室
FE-SEA 混合模型，通过理论计算和试验方法获取驾驶室模态密度、耦合损耗因子、结构内损耗因子数据，加
载振动和噪声激励后进行 FE-SEA 联合仿真。将仿真获取的驾驶室声压级与实测数据进行对比，分析对比表
明该模型在中频段利用 FE-SEA 混合法分析所得结果与试验测试值拟合程度较高。分析各子系统对驾驶室
声腔的能量贡献度，确定对驾驶室噪声贡献较大的子系统，有针对性地对驾驶室声学包进行整改，获得一定
降噪效果。
关键词：有限元 -统计能量分析；拖拉机驾驶室；中频噪音；预测
中图法分类号: TB535; U112.5 文献标识码: A 文章编号: 1000-310X(2020)05-0723-07
DOI: 10.11684/j.issn.1000-310X.2020.05.010

Research on tractor cab noise based on FE-SEA method

CHENG Kexiang MA Xintan

(School of Vehicle and Transportation, Henan University of Science and Technology, Luoyang 471400, China)

Abstract: In order to solve the intermediate-frequency noise problem of the tractor cab, this paper established
the tractor cabin finite element-statistical energy analysis (FE-SEA) hybrid model based on the method of FE-
SEA and obtained the data of tractor cabin mode density and coupling loss factor and structural loss factor
by theoretical calculation and tests. This hybrid model simulated FE-SEA by loaded with vibration and
noise excitation and compared the cabin sound pressure level with measured data. The results show that the
analysis results of the model using FE-SEA hybrid method in the intermediate frequency and the test value
fitting well. It also analyzed each subsystem of cabin cavity of energy contribution to determine the subsystem
that contributes a lot to the cabin noise. At last the acoustic package of the cab was rectified to obtain a
certain effect of noise reduction.
Keywords: Finite element-statistical energy analysis; Tractor cab; Intermediate frequency noise; Prediction

2020-01-13 收稿; 2020-04-02 定稿
国家科技部专项 (2017YFD070020402)
∗
作者简介: 程科翔 (1994– ), 男, 河南洛阳人, 硕士研究生, 研究方向: 振动与噪声。
† 通信作者 E-mail: 631170372@qq.com