亲爱的研友该休息了!由于当前在线用户较少,发布求助请尽量完整的填写文献信息,科研通机器人24小时在线,伴您度过漫漫科研夜!身体可是革命的本钱,早点休息,好梦!

Structural Vibration Analysis and Sound Quality Improvement for a Four-Cylinder Engine

曲轴 振动 有限元法 结构工程 柴油机 扭转(腹足类) 飞轮 扭转振动 工程类 模态分析 转动惯量 机械工程 声学 汽车工程 物理 医学 外科 量子力学
作者
Guoqing Dong,Wen‐Bin Shangguan
出处
期刊:SAE technical paper series
标识
DOI:10.4271/2023-01-1153
摘要

<div class="section abstract"><div class="htmlview paragraph">An Inline 4-cylinder engine is equipped with second-order balance shafts.When the engine is running under full load in 5000rpm,the engine generated severe structural radiation noise.The bench test analysis shows that the main reason is the resonance of the engine near 800Hz and 1500Hz. In this paper, a method for modeling and analyzing the vibration of the engine structure is proposed, and the sound quality of the engine is evaluated and imporved by the Moore–Glasberg loudness method. Firstly, the finite element model of the engine was established, and the experimental modes of the engine casing assembly, crankshaft and balance shaft were measured. The natural frequencies and modal shapes obtained by calculation and experiment were compared, which validates the established finite element model.Secondly, a flexible multi-body dynamic model of the engine was established. The inertia and torsional stiffness of the drive shaft at flywheel nose are taken into consideration in the model, and a modeling method of the scissor gears on the balance shaft is proposed. The calculated and measured torsion angle at crankshaft nose were compared and analyzed. The results show that the average relative error between the calculated value and the measured value of the torsion angle at crankshaft nose is less than 10%, which verifies the flexible multi-body dynamic model. The influence of the shim gear and drive shaft on the engine structure vibration was analyzed. The results show that the shim gear restrains the knock excitation of the engine, and the drive shaft reduces the torsional vibration of the crankshaft. Thirdly, taking the vibration velocity from engine casing assembly surface as the boundary condition, the field point sound pressure level of the engine casing assembly were calculated.The calculation results show that the overall noise of the engine is serious around 800Hz and 1500Hz, and the calculation results and the test results are in good agreement. In order to improve the sound quality of the engine, the Moore–Glasberg method was used to calculate the loudness of the engine field points, and an engine structure re-design method to enhance sound quality is proposed.</div></div>
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
大幅提高文件上传限制,最高150M (2024-4-1)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
aowulan完成签到 ,获得积分10
3秒前
魁梧的小笼包完成签到,获得积分10
4秒前
在水一方应助开放溪灵采纳,获得50
13秒前
jiayou发布了新的文献求助10
15秒前
21秒前
小二郎应助bo采纳,获得10
21秒前
caca完成签到,获得积分10
24秒前
hsvxvk完成签到 ,获得积分10
24秒前
26秒前
啊啊啊啊啊啊啊啊啊啊完成签到 ,获得积分10
37秒前
39秒前
zain完成签到 ,获得积分10
41秒前
Yuppies发布了新的文献求助10
44秒前
风趣的傲之完成签到 ,获得积分10
45秒前
快乐的慕青完成签到,获得积分10
50秒前
xiw完成签到,获得积分10
55秒前
jiayou完成签到,获得积分10
1分钟前
supermario应助科研通管家采纳,获得10
1分钟前
1分钟前
1分钟前
SciGPT应助飞飞飞采纳,获得10
1分钟前
Yuppies完成签到,获得积分10
1分钟前
热带蚂蚁完成签到 ,获得积分10
1分钟前
2分钟前
哈哈发布了新的文献求助10
2分钟前
华仔应助王欣采纳,获得10
2分钟前
霸气以寒发布了新的文献求助10
2分钟前
哈哈完成签到,获得积分20
2分钟前
2分钟前
王欣发布了新的文献求助10
2分钟前
Swear完成签到 ,获得积分10
2分钟前
2分钟前
可耐的芮完成签到 ,获得积分10
2分钟前
冷静的寒荷完成签到 ,获得积分10
2分钟前
79完成签到 ,获得积分10
2分钟前
顾君如完成签到 ,获得积分10
2分钟前
李健应助科研通管家采纳,获得10
3分钟前
英姑应助科研通管家采纳,获得10
3分钟前
合适如南完成签到,获得积分10
3分钟前
原始动物研究者协会完成签到 ,获得积分10
3分钟前
高分求助中
Licensing Deals in Pharmaceuticals 2019-2024 3000
Effect of reactor temperature on FCC yield 2000
Very-high-order BVD Schemes Using β-variable THINC Method 1020
PraxisRatgeber: Mantiden: Faszinierende Lauerjäger 800
Impiego dell'associazione acetazolamide/pentossifillina nel trattamento dell'ipoacusia improvvisa idiopatica in pazienti affetti da glaucoma cronico 730
錢鍾書楊絳親友書札 600
A new species of Coccus (Homoptera: Coccoidea) from Malawi 500
热门求助领域 (近24小时)
化学 医学 生物 材料科学 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 基因 遗传学 催化作用 物理化学 免疫学 量子力学 细胞生物学
热门帖子
关注 科研通微信公众号,转发送积分 3294413
求助须知:如何正确求助?哪些是违规求助? 2930341
关于积分的说明 8445942
捐赠科研通 2602612
什么是DOI,文献DOI怎么找? 1420666
科研通“疑难数据库(出版商)”最低求助积分说明 660559
邀请新用户注册赠送积分活动 643433