论文部分内容阅读
以某型号拖车式高空车模型为研究对象,针对不同工况下的不同回转角度,对整机进行了有限元分析,得到其在不同危险工况时的应力分布情况,并且采用了雨流法对整机进行了动态试验。结果表明,由于仿真分析的简化,使得整机重心变化,造成仿真时以回转角度γ=180°为对称轴,整机的应力应变呈对称分布,且波动较大,而试验中整机的应力分布保持稳定以及整机应力最大区域因简化而改变。然而仿真与试验都说明在危险工况下,整机各部分关键点的应力值在许用范围内,结构稳定,为后续结构优化提供理论依据和试验参考。
Taking a certain type of trailer-type aerial vehicle model as the research object, based on the different rotation angles under different working conditions, the finite element analysis of the whole machine was performed to obtain the stress distribution in different dangerous working conditions, and the rain flow method was adopted. The whole machine was tested dynamically. The results show that due to the simplification of the simulation analysis, the center of gravity of the whole machine is changed, resulting in a symmetry axis with a rotation angle of γ=180° during simulation. The stress and strain of the whole machine are distributed symmetrically and fluctuate, and the stress of the whole machine during the test is great. The distribution remains stable and the area with the largest overall stress changes due to simplification. However, simulations and experiments show that under the dangerous conditions, the stress values of the key points of the whole machine are within the allowable range, and the structure is stable, which provides a theoretical basis and experimental reference for subsequent structural optimization.