冰载荷下不锈钢复合板挠度特性分析

以复合板中面的挠度响应作为不锈钢复合板抗冲击性能的评价指标,基于能量法和经典层合板理论,考虑层间结构参数设计,通过横向载荷下的弯曲平衡微分方程,建立冰载荷下不锈钢复合板挠度响应简化解析模型。该分析模型将整个动态响应分析过程分为冰载荷计算分析和动力学方程求解两个阶段。分析了冰载荷模型的面倾角、冲击速度和碰撞位置对冰载荷的影响,确定极端工况参数,汇总接触面的节点力数据;分析了层厚比对挠度响应的影响规律;基于LS-DYNA有限元仿真以及数值算例分析,对比挠度响应仿真结果和解析计算值,验证了本文简化解析模型的准确性,研究结果对不锈钢复合板抗冲击性能分析和评估具有一定的参考价值。

Deflection characteristics of stainless steel composite plate under ice load

Taking the deflection response of the mid-surface of a composite plate as the evaluation index of the impact resistance of the stainless steel composite plate,based on the energy method and the classical laminated plate theory,considering the inter-layer structure parameter design,a simplified analytical model for the deflection response of stainless steel composite plates under ice load is established by using the bending equilibrium differential equation under lateral load.The analysis model divides the entire dynamic response analysis process into two phases:ice load calculation analysis and dynamic equation solving.The effects of the dip angle,impact velocity and collision position on the ice load are analyzed.The parameters of the extreme working conditions are determined,and the nodal force data of the contact surface are summarized.The influence of the layer thickness ratio on the deflection response is analyzed.The DYNA finite element simulation and numerical example analysis,comparing the deflection response simulation results and analytical calculations,verify the accuracy of the simplified analytical model.The research results have certain reference value for the analysis and evaluation of the impact resistance of stainless steel composite plates.