增材制造点阵夹芯混合结构的振动特性
Vibration Characteristics of Additive Manufacturing Lattice Sandwich Hybrid Structure Filled with Damping Materials
张佳乐 1王星 2耿小亮 1刘军 1李欣 1董炜璘 1张恒 1熊若钦1
作者信息
- 1. 西北工业大学 力学与土木建筑学院, 陕西 西安 710129
- 2. 航空工业沈阳飞机工业集团有限公司 创新研究院,辽宁 沈阳 110031
- 折叠
摘要
采用增材制造(additive anufacturing,AM)技术制备了钛合金点阵夹芯梁,使用硅橡胶作为阻尼材料对点阵空隙进行了填充.测试对比了有/无填充的点阵夹芯悬臂梁的模态振型,并对其进行了扫频振动激励.试验结果表明:填充阻尼材料不会改变结构振型,但可显著降低振动响应幅值.开展了硅橡胶的动态力学分析试验(dynamic mechanical analysis,DMA),结合广义麦克斯韦(generalized Maxwell model,GMM)粘弹性模型,标定了频域粘弹性模型参数.通过硅橡胶单轴拉伸试验标定了多项式型超弹性模型参数.基于粘超弹性模型及标定参数,对有填充的点阵夹芯悬臂梁进行了振动响应有限元模拟,与试验结果相符,证明本文采用的粘超弹性模型和其参数标定方法可有效用于混合结构的振动特性计算.
Abstract
Titanium alloy lattice sandwich beams were prepared by additive anufacturing(AM)technology,and silicone rubber was used as damping material to fill the lattice gap.The modal shapes of the lattice sandwich cantilever beam with or without filling were tested and compared,and the swept frequency vibration excitation test was carried out.The test results show that the filled damping material will not change the structural vibration mode,but significantly reduce the vibration response amplitude.The dynamic mechanical analysis(DMA)of silicone rubber was carried out,and the frequency domain viscoelastic model parameters were calibrated in combination with the generalized Maxwell model(GMM)viscoelastic model;the parameters of the polynomial form hyperelastic model were calibrated by the uniaxial tensile test of silicone rubber.Based on the viscoelastic model and calibration parameters,the finite element simulation of vibration response of lattice sandwich cantilever beam with filling is carried out,which is consistent with the experimental results.It is proved that the viscoelastic model and its parameter calibration method used in the paper can be effectively used to calculate the vibration characteristics of hybrid structures.
关键词
粘弹性模型/超弹性模型/点阵夹芯结构/增材制造/振动响应/阻尼Key words
viscoelastic model/hyperelastic model/lattice sandwich structure/additive manufacturing/vibration response/damping引用本文复制引用
基金项目
装备预研重点实验室项目(6142704200405)
出版年
2024
NETL
NSTL
万方数据