水下远场爆炸下功能梯度波纹夹层板动态响应与冲击防护机理研究

As a light impact protection strcuture, many mechanical properties of sandwich panels with functionally graded corrugated-core are quite different from those of sandwich panels with non functionally graded core.The dynamic response and impact protection mechanism of sandwich panels with functionally graded corrugated-core subjected to far-field underwater explosion are key scientific problems to be sloved. The main contents of this research contain: 1）the analysis of the property of far-field underwater blast loads imposing on sandwich panels with functionally graded corrugated-core. 2）the theoretical model and numerical model research of dynamc response of sandwich panels with functionally graded corrugated-core under far-field underwater blast. 3）the experimental studies on dynamic response of sandwich panels with functionally graded corrugated-core under far-field underwater blast. 4) dynamic response analysis model modification and impact protection mechanism research of sandwich panels with functionally graded corrugated-core under far-field underwater blast. In the study, the water-structure interaction will be taken into account. The theoretical models of blast load property analysis and dynamic response analysis of sandwich panels with with functionally graded corrugated-core under far-field underwater blast will be established as well. The above mentioned ideas are new and innovative. The study will reveal the features of dynamic response and impact protection mechanism of sandwich panels with functionally graded corrugated-core subjected to far-field explosion in water. The proposed study certainly has theorical and academic values and provides the solid basis of their engineering application.

作为一种轻质冲击防护结构，功能梯度波纹夹层板力学性能与传统非功能梯度夹层板有较大不同，其在水中远场爆炸载荷下的动态响应和冲击防护机理是需要解决的关键科学问题。本项目主要研究内容包括：1）水中远场爆炸下功能梯度波纹夹层板受载特性研究；2）水下远场爆炸下功能梯度波纹夹层板动态响应理论与数值分析模型研究；3）水下远场爆炸载荷下功能梯度波纹夹层板动态响应实验研究；4）功能梯度波纹夹层板动态响应分析模型修正及冲击防护机理研究。研究考虑爆炸冲击波作用下水介质与功能梯度夹层板的流固耦合效应，提出功能梯度夹层板受载特性以及动态响应的理论分析模型，研究工作具有创新性。本项研究将揭示功能梯度波纹夹层板在水中远场爆炸载荷下的非线性动态响应特性及冲击防护机理，具有重要的理论意义和学术价值，并为其工程应用奠定理论基础。

作为一种新颖的、潜在的轻质冲击防护结构，功能梯度波纹夹层板力学性能与传统非功能梯度夹层板有较大不同，其在水中远场爆炸载荷下的动态响应和冲击防护机理是需要解决的关键科学问题。本项目主要研究内容包括：1）水中远场爆炸下功能梯度波纹夹层板受载特性研究；2）水下远场爆炸下功能梯度波纹夹层板动态响应理论与数值分析模型研究；3）水下远场爆炸载荷下功能梯度波纹夹层板动态响应实验研究；4）功能梯度波纹夹层板动态响应分析模型修正及冲击防护机理研究。.本项目通过理论分析、数值计算以及实验测量完成了相应的研究内容，取得了如下主要研究成果：1）提出了功能梯度波纹夹层板小尺度模型的制备方法，并制备了相应的试验模型；2）自行研制了模拟水下远场爆炸载荷环境的小型实验装置，采用实验手段分析了不同载荷强度下功能梯度波纹夹层板的典型失效模式，研究了功能梯度波纹芯层结构的变化对于夹层板抗爆性能的影响，掌握了水下远场爆炸载荷作用下功能梯度波纹夹层板的动态响应特征；建立了流固全耦合有限元模型，从数值仿真角度进一步探究了水下远场爆炸载荷下功能梯度波纹夹层板动态响应过程、流固耦合面的压力分布、面板中心点速度响应特征和夹层板结构塑性能耗散特性；3）提出了水下远场爆炸载荷下复合夹层结构动力响应理论模型，并验证了理论模型的精度，为复合夹层结构动力特性的理论分析奠定了基础；4）构建水下远场爆炸载荷作用下功能梯度波纹夹层板的动态响应的Co-kriging代理模型，实现了水下爆炸载荷作用下功能梯度波纹夹层板动态响应的快速准确预报，并通过多变量分析深入研究了结构参数对夹层板动态响应值的影响规律，提出了功能梯度波纹夹层板水下抗爆性能多目标优化方法。.研究成果为功能梯度夹层板工程设计和应用提供了理论基础和技术支撑。