We develop a numerical investigation on the dynamic loading mitigation performance of Bouligand inspired bionic structures subjected to striker impacts and explosion induced blast overpressure loadings. A novel computational modelling approach based on Timoshenko beam theory as well as nonlinear Hertz contact theory has been employed to predict the nonlinear dynamic response of the bio-inspired helicoidal structures. The load attenuation mechanism of the biomimetic architected material has been uncovered and analyzed quantitively. The proposed models have been validated with accurate predictions being provided when compared with the experimental data in terms of the transmitted force and stress wave-time history. Numerical study on various parameters has also been performed to examine the effect of system configurations, material/geometrical characteristics and loading modes on the mitigation performance of the specific structures. The results open up new feasibilities for weakening the impulse transmission effectively by designing bio-inspired structures, which could be used to improve mechanical protection level for defense applications. The characteristics have also been qualitatively investigated using the models proposed in the present paper. This work interprets the possibility that the concept of the structural bionic design is used in the structural design on the load-bearing capacity.

我们开展了对Bouligand启发的仿生结构的动态载荷减轻性能的数值研究，该结构受到撞针撞击和爆炸引起的爆炸超压载荷的影响。基于蒂莫申科束理论和非线性赫兹接触理论的新型计算建模方法已被用来预测生物启发的螺旋结构的非线性动力响应。仿生建筑材料的负载衰减机理已被发现并进行了定量分析。与实验数据相比，在传递力和应力波时间历程方面，所提供的模型已经过准确的预测。还对各种参数进行了数值研究，以检查系统配置的影响，材料/几何特性以及加载模式对特定结构的缓解性能的影响。通过设计生物启发的结构，该结果为有效削弱脉冲传递开辟了新的可行性，可用于提高国防应用的机械防护等级。还使用本文提出的模型对特性进行了定性研究。这项工作解释了结构仿生设计概念在承载力上用于结构设计的可能性。可以用来提高国防应用的机械防护等级。还使用本文提出的模型对特性进行了定性研究。这项工作解释了结构仿生设计的概念在承载力上用于结构设计的可能性。可以用来提高国防应用的机械防护等级。还使用本文提出的模型对特性进行了定性研究。这项工作解释了结构仿生设计概念在承载力上用于结构设计的可能性。