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首页> 外文会议>2001 ASME Design Engineering Technical Conferences and Computers and Information in Engineering Conference Vol.2: 27th Design Automation Conference, 2001, 2001 >OPTIMIZATION FOR VIBRATION REDUCTION IN FINAL PHASE OF AUTOMOTIVE BODY STRUCTURAL DESIGN
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OPTIMIZATION FOR VIBRATION REDUCTION IN FINAL PHASE OF AUTOMOTIVE BODY STRUCTURAL DESIGN

机译：汽车车身结构设计最后阶段的减振优化

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摘要

In automotive body structural design, Computer Aided Engineering (CAE) has been widely used in order to evaluate noise, vibration, harshness (NVH). A CAE engineer has usually used a large-scale finite element model exceeding 1 million degrees of freedom to improve NVH performance criteria in the final design phase. It is, however, difficult for a CAE engineer to propose the modification candidate for the NVH reduction to an automotive designer in the phase, while good accuracy of the analysis is obtained by using the large-scale model. Only the small modifications can be performed for the NVH performance since configurations of main frame structures are usually determined with respect to crashworthiness in the phase. Therefore, a CAE engineer cannot provide the designer with effective information on time. In this paper, a new optimal design method using a reduction scheme based on the physical coordinates under many design constraints regarding the crashworthiness is proposed in order to overcome above problems. Our proposed method finds out an optimal layout and stiffness value efficiently from the calculation results Of the large-scale model. That is, we determine the appropriate location and additional scalar spring constants by minimizing the acceleration of the observation grid. The effectiveness and availability of this method are confirmed using an example.
机译：在车身结构设计中，计算机辅助工程（CAE）已被广泛使用，以评估噪声，振动，粗糙度（NVH）。 CAE工程师通常使用超过100万自由度的大规模有限元模型来改善最终设计阶段的NVH性能标准。但是，对于CAE工程师而言，很难在该阶段向汽车设计人员提出减少NVH的备选方案，而使用大型模型却可以获得很好的分析精度。由于通常根据阶段中的耐撞性来确定主机架结构的配置，因此只能对NVH性能进行小的修改。因此，CAE工程师无法及时为设计者提供有效的信息。为了克服上述问题，本文提出了一种在许多设计约束条件下采用基于物理坐标的折减方案的优化设计新方法。我们提出的方法从大型模型的计算结果中有效地找到了最佳的布局和刚度值。也就是说，我们通过最小化观察网格的加速度来确定适当的位置和其他标量弹簧常数。通过实例确认了该方法的有效性和可用性。

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