轴向局部加载对矩形板件屈曲承载力影响研究  

Effects of axial local loading on buckling capacity of rectangular plates

作　　者：徐兵 王朗[1,2] 刘钦 黄金坤 梁玉雄[4] XU Bing;WANG Lang;LIU Qin;HUANG Jinkun;LIANG Yuxiong(School of Civil Engineering and Architecture,Anhui University of Science&Technology,Huainan 232001,China;School of Civil Engineering,Yancheng Institute of Technology,Yancheng 224051,China;China MCC17 Group Co.,Ltd.,Ma’anshan 243000,China;School of Transportation Engineering,East China Jiaotong University,Nanchang 330013,China)

机构地区：[1]安徽理工大学土木建筑学院,安徽淮南232001 [2]盐城工学院土木工程学院,江苏盐城224051 [3]中国十七冶集团有限公司,安徽马鞍山243000 [4]华东交通大学交通运输工程学院,江西南昌330013

出　　处：《邵阳学院学报(自然科学版)》2025年第2期27-37,共11页Journal of Shaoyang University:Natural Science Edition

基　　金：安徽省重点研究和开发计划项目(2023t07020018);江西省交通运输厅科技项目(2023C0008);长安大学中央高校基金项目(300102212525)。

摘　　要：矩形板件是薄壁吸能结构中一种普遍采用的典型结构形态。研究矩形薄板在承受轴向压力时板件的边界条件对其屈曲性能的影响具有重要的意义。基于经典薄板理论和欧拉公式,运用Abaqus有限元分析软件创建矩形板件模型,研究了边界加载方法、边界约束、屈曲半波数、宽厚比和高厚比等因素对板件屈曲性能的影响。结果表明,在满布荷载条件下,给定宽厚比的限值,四边简支薄板的模拟结果与经典薄板理论解基本一致,但是薄板高宽比的增大对薄板的屈曲承载力具有削弱作用;两端简支薄板与欧拉公式计算结果一致。当矩形板件受局部荷载时,加载比例的下降导致承载力结果逐渐偏离理论解,对两端简支边界板件的屈曲承载力有增强作用,对四边简支边界板件的屈曲承载力有削弱作用,且加载比例越小,非加载端上的约束对板件的影响越弱。本研究旨在完善薄壁结构屈曲性能的理论体系。Rectangular plates are a typical structural form commonly used in thin-walled energy-absorbing structures.Investigating the effect of boundary conditions on the buckling properties of rectangular thin plates under axial pressure is crucial.Utilizing classical thin plate theory and the Euler formula,a rectangular plate model was developed using the finite element analysis software Abaqus to explore the effects of boundary loading methods,boundary constraints,buckling half-wave number,width-thickness ratio,and height-thickness ratio on the buckling behavior of the plate.Findings demonstrated that under full load conditions,a four-sided simply supported thin plate s simulation results generally conformed to classical theoretical solutions for specific width-to-thickness ratios.However,an increase in the height-width ratio negatively affected buckling capacity.The findings for the two-side simply supported thin plates and aligned with Euler s formula calculations,too.Under local loading conditions,the simulation results revealed deviations from theoretical predictions;specifically,a reduction in loading ratio enhanced the buckling capacity of two-sided simply supported plates while adversely affecting four-sided simply supported ones.As the loading ratio decreased,the influence of constraints on the non-loaded side of the plate diminished.This research aims to refine the theoretical framework for assessing the buckling performance of thin-walled structures.

关 键 词：薄壁结构 屈曲承载力 局部加载 

分 类 号：TU391[建筑科学—结构工程]