典型波纹夹芯杂交夹层结构砰击非线性动态力学行为及失效机理研究

项目名称： 典型波纹夹芯杂交夹层结构砰击非线性动态力学行为及失效机理研究

项目编号： No.51279065

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 水利工程

项目作者： 程远胜

作者单位： 华中科技大学

项目金额： 82万元

中文摘要： 典型波纹夹芯杂交夹层结构（HSS）是一种可应用于高速船舶的新型结构形式，其在许多力学性能上与传统加筋板结构有较大不同，其在砰击载荷下的非线性动态力学行为与失效机理是必须要解决的关键科学问题。本项目主要研究内容包括：1）HSS砰击载荷特性研究；2）HSS在砰击载荷下的非线性动态力学行为及失效机理研究；3）HSS砰击载荷特性及非线性动态力学行为系列实验研究；4）HSS在砰击载荷下失效参数表征研究。本项研究拟通过气-液-固精细数值模拟、基于均匀化方法和微分求积法的近似理论估算、以及系列模型试验系统获得HSS的非线性动态力学行为特征和失效模式。项目首次提出开展典型HSS在砰击载荷下的非线性动态力学行为、失效机理以及失效参数表征研究，具有整体创新性。本项目研究将揭示典型波纹夹芯HSS在砰击载荷下的非线性动态力学行为特征及失效机理，具有重要的理论意义和学术价值，并为HSS工程应用奠定理论基础。

中文关键词： 砰击；杂交夹层结构；波纹芯层；失效机理；非线性动态力学行为

英文摘要： Hybrid sandwich structures with corrugated cores (HSS) are new type structures which may be used in high speed vessels. The mechanical properties of such new structures are rather different from those of the traditional stiffened plate structures. Therefore the nonlinear dynamic responses and failure mechanism of HSS under slamming are key scientific problems to be solved. The primary contents of the proposal include: (1) Load characteristics of HSS under slamming impact. 2) Nonlinear dynamic mechanical behavior and failure mechanism of HSS under slamming impact. 3) Series experiment of HSS models under slamming impact. 4) Failure indicators of HSS due to slamming impact. In the study, 3D multi-phase (air-water-structure) numerical models will be built to simulate the whole slamming process and homogenization method and general differential quadrature method (GDQ) are employed to evaluate the dynamic response of HSS under slamming. The series experiments of HSS models will be conducted to validate the numerical modeling and analytical evaluation. The proposal is new and innovative as such study is firstly proposed and GDQ method is firstly used to analyze the dynamic response of HSS due to slamming. This study will reveal the characteristics of nonlinear dynamic response and failure mechanism of HSS under slammi

英文关键词： slamming；hybrid sandwich structure；corrugated-core；failure mechanism；nonlinear dynamic response