摘要
为了准确预测纤维复合薄板的振动响应,本文采用了多层次修正技术,考虑了基础激励的影响,建立了该类型复合薄板的理论模型,并明确了基于多层次修正的基础激励下复合薄板振动响应预测原理。结合测试获得的固有频率、振型及频域响应等实验数据,在第一层次修正环节对理论模型中复合薄板的长度、宽度和厚度等尺寸参数进行修正;在第二层次修正环节,对纤维纵向、横向弹性模量、剪切模量和泊松比进行修正,在第三层次修正环节,则对不同纤维方向的损耗因子进行修正,进而提出了复合薄板振动响应的预测流程。并以TC300碳纤维/树脂基复合薄板为例,搭建了振动响应测试系统,并对预测结果进行了验证。验证结果表明,预测获得的共振及非共振响应结果与测试结果的误差最大不超过15%,处于误差允许的范围内,进而验证了所提出的预测方法的正确性。
This research studied the problem of accurate prediction of vibration response in fiber composite thin plate using the multilevel correction technique.First,base excitation loading was considered in the formulation of the theoretical model of such a composite thin plate,clarifying the principle of prediction of vibration response by multilevel correction technique.Next,based on the measured natural frequencies,modal shapes,and frequency domain response data,dimensions including length,width,and thickness of the composite thin plate were modified at the first level of correction.The longitudinal and transverse elastic moduli,shear modulus and Poisson′s ratio were then modified at the second level of correction,while loss factors in different fiber directions were modified at the third level of correction.A method to predict vibration response in composite thin plate was then proposed.Finally,a TC300 fiber/epoxy composite plate was taken as a study object to set up the vibration response testing system,verifying the predicted results with the experimental test data.It was found that the maximum predicted errors of resonance and non-resonance were no more than 15%compared with experimental results,which were within acceptable range,verifying the effectiveness of the proposed method.
作者
李晖
薛鹏程
周正学
韩清凯
LI Hui;XUE Pengcheng;ZHOU Zhengxue;HAN Qingkai(School of Mechanical Engineering and Automation,Northeastern University,Shenyang 110819,China)
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2018年第10期1661-1667,共7页
Journal of Harbin Engineering University
基金
国家自然科学基金项目(51505070)
中央高校基本科研业务费专项资金项目(N150304011
N160313002
N160312001)
东北大学航空动力装备振动及控制教育部重点实验室研究基金项目(VCAME201603)
关键词
纤维增强
复合薄板
基础激励
多层次
修正技术
响应预测
共振响应
非共振响应
fiber-reinforced
composite thin plate
base excitation
multilevel
correction technique
response prediction
resonance response
non-resonant response
