摘要
提出了一种基于超梁降阶模型的复杂梁式结构动力学模型修正技术。依据超梁降阶模型理论,并考虑可能的修正参数,将复杂梁式结构降阶为具有较高计算精度的超梁降阶模型;而后,利用基于灵敏度分析及优化算法的模型修正技术,并根据模态测试数据对模型参数进行修正,获得能够准确反映实际结构动力学特征的修正模型。最后,通过多种动力问题分析对修正模型进行评估,并与实际结构的响应结果进行对比。以典型蒙皮加筋圆柱壳为例实现这一过程。结果表明,所提出的模型修正方法具有可行性和较高的计算效率。
A method based on reduced super beam for dynamic model updating of complicated beam-type structures was proposed in this paper.Firstly,a reduced super beam model with high accuracy was constructed for the complicated beam-type structure,considering the possible updating parameters.Then,the model parameters of reduced super beam model were updated using the tested modal data based on sensitivity analysis and optimization algorithm,and then an updated model that can represent the dynamic behavior of the practical structure accurately was obtained.Finally,application in a variety of dynamic problem analysis was performed on the updated model and the updating results were assessed by comparing with the practical structure.A typical stiffened cylindrical shell model,serving as the illustrative example,was employed for model updating and validation.The results demonstrate that the proposed method is valid and efficient.
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
2017年第5期620-626,633,共8页
Journal of Solid Rocket Technology
基金
国家自然科学基金项目(11402077)
关键词
超梁降阶模型
梁式结构
动力学
模型修正
优化
reduced super beam
beam-type structure
dynamics
model updating
optimization
