局部涂敷硬涂层薄板有限元建模及涂敷位置优化

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摘要在固定硬涂层形状的前提下寻找最佳的涂敷位置是工程化实施硬涂层阻尼减振的迫切需求。本文以硬涂层薄板为例，研究实现上述硬涂层阻尼优化的方法。首先，针对局部涂敷硬涂层的薄板结构完成了有限元建模，并利用修正模态应变能法确定了涂层复合结构的模态损耗因子。以获得单阶次或者多阶次最大模态损耗因子为目标，以涂层位置为设计变量描述了本文的硬涂层薄板阻尼优化模型。进而，提出利用多种群遗传算法求解该优化问题的方法。最后，以单面局部涂敷NiCrAlCoY+YSZ硬涂层材料的悬臂板为例进行了实例研究，基于所创建的优化模型和优化方法，在薄板上实施了硬涂层涂敷位置的优化，并用实验验证了硬涂层板阻尼优化结果的合理性。

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	刘蓉
	孙伟

关键词 ：局部涂层, 硬涂层, 薄板, 有限元建模, 涂层位置, 优化

Abstract：Finding the best coating location of hard coating with a fixed shape is an urgent need for the engineering application of hard-coating dampings.A thin plate partially covered with hard coating was chosen to study the damping optimization of the coatings.The corresponding finite element model was derived for its free vibration analysis, and the modal loss factors of the coating structure were determined by the modified modal strain energy method.A damping optimization model for the hard-coating thin plate was created, taking the maximum modal loss factor of single order or multi orders as the objective function and the coating position as the design variable.Moreover, a method named multiple population genetic algorithm was proposed to solve the optimization problem.Finally, a cantilever titanium plate with a single side partially deposited with NiCrAlCoY+YSZ hard coating was taken as an example to carry out a case study.Based on the developed optimization model and method, the optimization of coating location was carried out and the rationality of the damping optimization results for the hard-coating plate was verified by experiments.

Key words： partially covered with hard coating hard coating thin plate finite element modeling coating position optimization

收稿日期: 2017-06-16 出版日期: 2018-11-15

引用本文:

刘蓉，孙伟. 局部涂敷硬涂层薄板有限元建模及涂敷位置优化[J]. 振动与冲击, 2018, 37(22): 144-150.
LIU Rong,SUN Wei. Finite element modeling and damping optimization of a thin plate partially covered with hard coating. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(22): 144-150.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2018/V37/I22/144

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