滑移和同步脉冲载荷下圆柱壳瞬态响应的对比分析

摘要

为定量分析滑移和同步脉冲载荷下圆柱壳瞬态响应的差异，以不同尺寸的圆柱壳为对象，分别加载滑移和同步脉冲载荷进行数值模拟，研究了平均应变差异随几何特征参数的变化规律。结果表明：对于圆柱壳结构，平均应变差异随径厚比 d／t 变化的情况与长度相关，厚度变化对圆柱壳的平均应变差异影响较小；对于不同厚度的圆柱壳，平均应变差异随细长比 d／l 的增大而减小，当 d／l ≤0．45时，平均应变差异在20％以内。分析结果为相关试验设计和结果评估提供了有价值的参考。%In order to quantitatively and comparatively investigate the transient responses of cylindrical shells induced by moving and simultaneous impulsive loads,we studied in this work the law of average strain difference varying with geometric parameters by numerical simulations where the two kinds of loads were respectively applied on cylindrical shells with different dimensions.The results show that, for the cylindrical shell,the average strain difference varies with the diameter-thickness ratio,d/t,and the length,that the influence of the shell thickness on the average strain difference is insignificant for specific diameters and lengths.The average strain difference decreases with the increase of the diameter-length ratio d/l,and that when d/l ≤0.45 the average strain difference is below 20%.Our results and conclusions provide a theoretical support for relevant experiment design and evaluation.