局部贴敷阻尼层空间管路有限元建模及贴敷位置优化

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (3) : 147-157.

论文

李家鑫1,2，王栋1,2，孙伟1,2

作者信息 +

Finite element modeling of spatial pipeline with locally attached damping layer and position optimization of damping layer

LI Jiaxin1,2, WANG Dong1,2, SUN Wei1,2

Author information +

文章历史 +

摘要

为了降低处于服役阶段的航空发动机管路的有害振动，这里描述了一种在管体表面局部贴敷粘弹性阻尼层对管路进行减振的方法，主要包括阻尼层-空间管路系统动力学有限元建模及阻尼层贴敷位置优化。在建模上，基于ANSYS平台建立了满足寻优算法调用的阻尼层-空间管路参数化有限元模型。同时，整个模型引入了两种阻尼，分别是卡箍的支撑阻尼和粘弹性阻尼层的材料阻尼。在贴敷位置优化方面，创建了以阻尼层贴敷位置为设计变量、以1阶最大共振响应最小为优化目标的优化模型，并给出了采用遗传算法对该优化模型进行求解的流程。最后进行了实例研究，用搭建的贴敷阻尼层空间管路实验系统校验了所创建的阻尼层-空间管路分析模型的合理性。在此基础上，执行了阻尼层位置优化，获得了在可移动范围内使共振响应最小的阻尼层贴敷位置方案，并通过与5种随机方案的数值比较证明了优化结果的合理性。

Abstract

In order to reduce the harmful vibration of aero-engine pipeline in service stage, this paper describes a method to reduce the vibration of pipeline by attaching viscoelastic damping layer locally on the surface of pipeline, which mainly includes dynamics finite element modeling of damping layer-spatial pipeline system and position optimization of damping layer. In the modeling, based on ANSYS platform, a parametric finite element model of damping layer-spatial pipeline is established to satisfy the calling of optimization algorithm. At the same time, two kinds of damping are introduced into the whole model, which are the support damping of clamp and the material damping of viscoelastic damping layer. In the aspect of position optimization, an optimization model with the attaching position of damping layer as the design variable and the minimum of first-order maximum resonance response as the optimization objective is created, and the solution flow for the optimization model is given by genetic algorithm. Finally, a case study is carried out, and the rationality of the damping layer-spatial pipeline analysis model is verified by the experimental system of spatial pipeline with damping layer. Based on this, the position optimization of damping layer is carried out, and the damping layer attaching position scheme which minimizes the resonance response in the movable range is obtained. The rationality of the optimization results is proved by numerical comparison with five random schemes.

导出引用

李家鑫1,2，王栋1,2，孙伟1,2. 局部贴敷阻尼层空间管路有限元建模及贴敷位置优化[J]. 振动与冲击, 2024, 43(3): 147-157

LI Jiaxin1,2, WANG Dong1,2, SUN Wei1,2. Finite element modeling of spatial pipeline with locally attached damping layer and position optimization of damping layer[J]. Journal of Vibration and Shock, 2024, 43(3): 147-157

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