摘要
实现声学包性能与轻量化的平衡优化设计是声学工程师密切关注的问题。通过分析噪声传递至车内的路径,提出防火墙钣金-通风口钣金-仪表台组合系统可近似视作双层板隔声结构,基于此思路进行SEA分析确认防火墙系统中不同区域组合系统对隔声性能的影响与贡献量。然后对内前围可行材料进行正交试验设计,结合贡献量制定加权极差指标,以此提出声学包优化方案,并制作优化样件进行装车试验验证。结果表明优化方案在部件与整车性能基本不变的条件下降低重量40%以上,达到了性能与轻量化平衡优化设计的目的。
The optimal design of acoustic package to achieve the balance between performance and lightweight is a problem that acoustic engineers pay great attention to.Based on the analysis of the transmission path of noise to the vehicle inside,the combination system of firewall sheet metal,vent sheet metal and instrument panel is proposed.This combination system can be approximately treated as a double-layer plate sound insulation structure.SEA analysis is conducted to confirm the influence and contribution of different region combination systems of the firewall system on sound insulation performance.Then,orthogonal experimental design is carried out for the feasible materials of inner dash,and the weighted range index is established based on the contribution.Finally,the optimization scheme of acoustic package is put forward,and the optimal sample is made to validate the effect.The results show that the optimization scheme can reduce the weight by more than 40%,and achieve the balance between performance and lightweight of the acoustic package.
作者
张天宇
邓江华
孟祥龙
黄晓迪
ZHANG Tianyu;DENG Jianghua;MENG Xianglong;HUANG Xiaodi(China Automotive Technology and Research Center Co.,Ltd.,Tianjin 300300,China)
出处
《噪声与振动控制》
CSCD
2020年第6期170-175,181,共7页
Noise and Vibration Control
关键词
声学
声学包
贡献量分析
极差分析
轻量化设计
acoustics
acoustic-package
contribution analysis
range analysis
lightweight design
