锻压技术

基于Workbench 12.0参数化设计的型钢屈曲特性分析

英文标题：Analysis on buckling characteristics of section steel based on Workbench12.0 parametric design

作者：郭俊旺单慧勇刘玉乐李书环宋欣

单位：天津农学院工程技术学院

分类号：TG301

出版年,卷(期):页码：2018,43(12):131-135

摘要：

为直接判定压杆不会发生屈曲，以保证常规的受力分析有效，研究在压杆强度足够的情况下受力杆件需满足的条件。应用压杆屈曲特性理论，定义了某一种型钢在压应力刚好为屈服极限的情况下，杆件所对应的长度为“相对屈曲长度”。通过有限元分析软件Workbench12.0参数化设计功能，结合材料力学的屈曲理论，计算了方管、角钢、槽钢3种主要型材的相对屈曲长度。结果表明，当实际使用压杆的长度小于相对屈曲长度时，可不考虑压杆的屈曲，只需整体构件满足强度要求即可；反之，压杆的长度大于相对屈曲长度时，即使整体构件的强度足够，也需单独对压杆进行屈曲分析，以保证整体的稳定性。利用该结论，对所有规格的型钢进行相对屈曲长度计算，制定选用型钢、设计构件的参数，可大量减少常规设计的工作量，保证机械设备的结构安全。

In order to judge the pressure bar without buckling and ensure the effectiveness of conventional force analysis，some conditions to be meet for the pressure bar under enough strength were studied, and the concept of “relative buckling length”that is the corresponding length of bar for a certain type of section steel was defined when the pressure stress was up to the yield limit by applying the buckling characteristics theory of pressure bar. Then, the relative buckling lengths of three main sections, such as square tube, angle steel and channel steel, were calculated by the parametric design function of the finite element analysis software Workbench 12.0 combining with the buckling theory in the material mechanics. The results show that when the length of the practical pressure bar is less than the relative buckling length, only the integral component can meet the strength requirement without considering the buckling of the practical pressure bar. Conversely, even if the strength of the integral component is sufficient, the buckling analysis of the pressure bar is required separately to ensure the overall stability. With this conclusion, calculating the relative buckling lengths of all specifications of section steel and designing the parameters of selected section steel and components can reduce the workload of the conventional design and ensure the structure safety of the mechanical equipment.

基金项目：

基金项目:天津农学院研究生培养质量提升项目（2017YAL003）；天津市科技计划项目（17ZXYENC00080）

作者简介：郭俊旺（1977-），男，硕士，讲师 Email：tngjw2004@163.com

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