NVH optimization methodologies based on bead modification analysis in vehicle body design
NVH optimization methodologies based on bead modification analysis in vehicle body design
复制标题
车身设计中基于胎圈修改分析的NVH优化方法
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
W. Desmet
中科院分区：
文献类型：
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作者：
Antonio Maressa;B. Pluymers;S. Donders;W. Desmet
如今，在汽车工业中，车辆设计周期主要是由市场的高度竞争性质和不断增长的客户需求和期望所决定的。这对汽车制造商提出了挑战，要求他们在更短的时间内生产出更高质量的产品，同时降低设计成本。这只有在设计周期主要基于虚拟建模和仿真的情况下才能实现，从而大大缩短依赖于昂贵且耗时的物理原型的传统测试阶段。因此，如今，设计周期的每个阶段都由CAE（计算机辅助工程）方法支持，该方法允许预测各种功能性能属性，例如NVH（噪声，振动和粗糙度），耐撞性等。此外，研究人员已经开发了许多技术来加快计算速度，实现有效的修改方法和优化。本文主要研究汽车内部NVH性能。针对某汽车车身有限元模型，采用WBS （Wave-Based Substructuring）技术实现了简化表达式。更具体地说，已经应用了一种修改方法，该方法基于对NVH行为至关重要的子部件上产生的头图案。通过将简化结构模型与有效的ATV（声传递矢量）方法相结合来预测室内声学性能，可以有效地评估结构修改对室内NVH水平的影响，从而优化整体NVH行为。本文的主要创新是利用结构优化软件结合声学目标函数对车辆振动声学进行优化。基于两种优化策略，提出了两种不同的优化方法。最后，对优化后的元件进行了辐射声压级（SPL）和可制造性评价。
Nowadays, in automotive industry the vehicle design cycle is mainly ruled by the highly competitive nature of the market and the ever increasing customer demands and expectations. This challenges automotive manufacturers to achieve higher-quality products in ever shorter time frames, while at the same time, reduce the design costs. This can only be achieved when the design cycle takes place largely on the basis of virtual modeling and simulation such that the traditional test phase, which relies on expensive and time-consuming physical prototypes, can be drastically shortened. As a result, nowadays, each stage of the design cycle is supported by CAE (Computer Aided Engineering) methodologies which allow to predict various functional performance attributes, such as NVH (Noise, Vibration & Harshness), crashworthiness, etc. Moreover, researchers have developed many techniques to speed up the calculations, enabling efficient modification approaches and optimizations. This paper focuses on the vehicle interior NVH performance. For a vehicle body Finite Element (FE) model, a reduced formulation has been achieved by using the WBS (Wave-Based Substructuring) technique. More specifically, a modification approach has been applied that is based on the generation of bead patterns on a subcomponent that has been identified as critical for the NVH behavior. By combining the reduced structural model with an efficient ATV (Acoustical Transfer Vector) approach to predict the interior acoustics performance, one can efficiently evaluate the effect of structural modifications on the interior NVH levels, such that the global NVH behavior can be optimized. The main innovation introduced in this paper comprises the optimization of vehicle vibro-acoustics by making use of a structural optimization software in combination with an acoustic target function. Two different methodologies have been worked out, based on two strategies for bead pattern optimization. Finally, the optimized component has been evaluated in terms of radiated Sound Pressure Level (SPL) and manufacturability.