流固耦合下U型金属波纹管损耗因子研究

Study on the Loss Factor of U-shaped Metal Bellows Under Fluid-solid Coupling

利用模态分析的方法对有、无介质以及波高、波厚对波纹管损耗因子的影响进行了研究,根据数值分析结果,得到了波纹管不同参数对损耗因子的影响变化曲线。结果表明,介质压力在3.2 MPa处存在一个损耗因子峰值;集中力的拉/压力对损耗因子的影响规律是相反的,拉力增加损耗因子减小而压力增加损耗因子增加;波高与损耗因子之间近似存在一种线性关系;壁厚为0.8 mm时损耗因子值最小。最后,通过试验验证了有限元模型和数值分析的可靠性和准确性。

The influence of bellows loss factor was studied by modal analysis method with or without medium and wave high and thickness. According to the results of ANSYS numerical analysis, the influence vary curves of different parameters on the loss factor are obtained. The result shows that there is a loss factor peak at 3.2 MPa in the medium pressure and the focused tension/pressure reversely affects the loss factors, meaning that with the increase of ten- sion, the loss factor decreases and with the increase of pressure, the loss factor increases. The wave height and loss factor approximately shows linear relationship. When the wall thickness is 0.8 mm ,the loss factor is the smallest. Fi- nally, the correctness and validity of the finite element model and ANSYS numerical analysis are verified by the exper- imental method.