Abstract With attributes such as high stiffness, high damping and lightweight, laser-welded corrugated-core (LASCOR) sandwich panels with polyurea-metal laminate (PML) face sheets were envisioned as multifunctional sandwich constructions to meet the growing needs of loading bearing and vibration/noise suppression. The sensitivity of vibration damping characteristics of these novel sandwich panels was systematically investigated using a combined finite element-modal strain energy (FE-MSE) method, and their superiority over monolithic panels having equal mass was highlighted. Subsequently, the fidelity of using the surrogate modeling technique to approximate the damping loss factor of the sandwich panel was analyzed. Under the principles of cross-validation, the orthogonal polynomial model was found to provide the most accurate predictions among four widely used surrogate models. A high-efficiency optimization procedure factoring structural stiffness, damping loss, and weight of the sandwich panel was proposed by coupling the surrogate model and an optimization algorithm. For single-objective optimization, the total weight of the optimal sandwich panel decreased by around 7% compared with that of preliminary design. Meanwhile, the Pareto fronts obtained from multi-objective optimizations revealed significant enhancements of both damping loss factor/structural stiffness and specific damping loss factor/structural stiffness.

中文翻译：

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具有聚脲金属层压板面板的金属波纹夹芯板的优化设计同时减振和结构刚度

摘要 具有高刚度、高阻尼和轻量化等特性，带有聚脲金属层压板 (PML) 面板的激光焊接波纹芯 (LASCOR) 夹芯板被设想为多功能夹层结构，以满足日益增长的承载和振动需求。 /噪声抑制。使用组合有限元-模态应变能 (FE-MSE) 方法系统地研究了这些新型夹层板的振动阻尼特性的敏感性，并强调了它们优于具有相同质量的整体板的优势。随后，分析了使用代理建模技术来近似夹层板阻尼损耗因子的保真度。在交叉验证的原则下，发现正交多项式模型在四种广泛使用的替代模型中提供了最准确的预测。通过耦合代理模型和优化算法，提出了一种考虑夹层板结构刚度、阻尼损失和重量的高效优化程序。对于单目标优化，优化的夹芯板的总重量比初步设计的总重量减少了 7% 左右。同时，从多目标优化中获得的帕累托前沿揭示了阻尼损耗因子/结构刚度和特定阻尼损耗因子/结构刚度的显着增强。通过耦合代理模型和优化算法，提出了夹芯板的重量和重量。对于单目标优化，优化的夹芯板的总重量比初步设计的总重量减少了 7% 左右。同时，从多目标优化中获得的帕累托前沿揭示了阻尼损耗因子/结构刚度和特定阻尼损耗因子/结构刚度的显着增强。通过耦合代理模型和优化算法，提出了夹芯板的重量和重量。对于单目标优化，优化的夹芯板的总重量比初步设计的总重量减少了 7% 左右。同时，从多目标优化中获得的帕累托前沿揭示了阻尼损耗因子/结构刚度和特定阻尼损耗因子/结构刚度的显着增强。