Definition and Application of a Target Cascading Process on a Fully Trimmed Body, from Vehicle Objectives to Component Objectives

噪音、振动和粗糙度 过程(计算) 汽车工业 传递函数 计算机科学 噪音(视频) 组分(热力学) 结构声学 有限元法 振动 传输(计算) 钥匙(锁) 工程类 结构工程 声学 航空航天工程 人工智能 物理 电气工程 图像(数学) 操作系统 热力学 并行计算 计算机安全
作者
Cyril de Walque,Ji Woo Yoo,ChanHee Jeong,Tae-Sik Kong
出处
期刊:SAE technical paper series
标识
DOI:10.4271/2024-01-2916
摘要

<div class="section abstract"><div class="htmlview paragraph">Finite element (FE) based simulations for fully trimmed bodies are a key tool in the automotive industry to predict and understand the Noise, Vibration and Harshness (NVH) behavior of a complete car. While structural and acoustic transfer functions are nowadays straightforward to obtain from such models, the comprehensive understanding of the intrinsic behavior of the complete car is more complex to achieve, in particular when it comes to the contribution of each sub-part to the global response. This paper proposes a complete target cascading process, which first assesses which sub-part of the car is the most contributing to the interior noise, then decomposes the total structure-borne acoustic transfer function into several intermediate transfer functions, allowing to better understand the effect of local design changes. This transfer functions decomposition opens the door to cascading full-vehicle objectives, which typically consists of achieving a maximal noise level in the cabin, to component-level objectives. This process is demonstrated on the floor panel of an industrial FE model for which both the structural and acoustic transfer functions have been extensively validated against measurements. Intermediate transfer functions are computed and compared for several alternative designs. The same process is finally applied on reduced models, which consider only the floor panels and acoustic trims. Those reduced models allow much faster design iterations and prove to be reliably predicting trends.</div></div>
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