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首页> 外文会议>2002 ASME International Mechanical Engineering Congress and Exposition , Nov 17-22, 2002, New Orleans, Louisiana >TOPOLOGY OPTIMIZATION OF CONSTRAINED DAMPING LAYER TREATMENTS
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TOPOLOGY OPTIMIZATION OF CONSTRAINED DAMPING LAYER TREATMENTS

机译：约束阻尼层处理的拓扑优化

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摘要

The aim of this research is to determine the optimal shape of a constrained viscoelastic damping layer on an elastic beam by means of topology optimization. The optimization objective is to maximize the system loss factor for the first resonance frequency of the base beam. All previous optimal design studies on viscoelastic lamina have been size or shape optimization studies, assuming a certain topology for the damping treatment. In this study, this assumption is relaxed, allowing an optimal topology to emerge. The loss factor is computed using the Modal Strain Energy method in the optimization process. Loss factor results are validated by using the half-power bandwidth method, which requires obtaining the forced response of the structure. The ABAQUS finite element code is used to model the structure with two-dimensional continuum elements. The optimization code uses a Sequential Quadratic Programming algorithm. Results show that significant improvements in damping performance, on the order of 100% to 300%, are obtained by optimizing the constrained damping layer topology. A novel topology for the constraining layer emerges through the optimization process.
机译：这项研究的目的是通过拓扑优化来确定弹性梁上约束粘弹性阻尼层的最佳形状。优化目标是针对基础梁的第一谐振频率最大化系统损耗因子。以前所有关于粘弹性薄层的最佳设计研究都是尺寸或形状优化研究，假设阻尼处理具有一定的拓扑结构。在这项研究中，此假设是宽松的，从而允许出现最佳拓扑。在优化过程中，使用模态应变能方法计算损耗因子。损耗因数结果通过使用半功率带宽方法验证，该方法需要获得结构的强制响应。 ABAQUS有限元代码用于对具有二维连续体元素的结构进行建模。优化代码使用顺序二次规划算法。结果表明，通过优化受约束的阻尼层拓扑结构，可实现阻尼性能的显着改善，数量级为100％到300％。通过优化过程，出现了一种新的约束层拓扑。

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