电动缸轴向线性屈曲的数值仿真分析

The Linear Buckling Numerical Analysis of Electric Cylinder Under Axial Force

电动缸的屈曲问题一直没有确定的理论计算方法。传统方法多是将其视为一个整体去分析,这种方法没有充分考虑电动缸的结构特点和受力状态,容易产生较大误差。以某电动缸为研究对象,剖析其结构与受力,基于材料力学和机械设计理论中的简化方法,对其结构进行合理简化,建立了一种新的线性屈曲模型,使用了能量法对该模型的临界屈曲载荷进行数值计算,通过有限元软件仿真验证计算结果,并与传统整体法得出的结果进行对比分析,结果证明了整体法的不准确之处与简化方法的合理性。

There has been no definite calculation method for the linear buckling of electric cylinders for a long time. Traditional method was regarding it as a whole. This method did not fully consider the structural characteristics and stress state of the electric cylinder, which leading to large errors. Taking some electric cylinder as the research object, the structure and force of the cylinder analyzed, basing on the simplified method in mechanical design theory, a new linear buckling model is established. The critical buckling force of the cylinder is calculated by energy method, and the calculation results are verified by finite element software. Comparing with the results obtained by traditional way, the reasons prove the inaccuracy of the whole method and the rationality of the simplified method.