内压和压缩位移下U形波纹管平面稳定性计算方法研究

Engineering Calculation Method and Criterion to the In-plane Instability of Non-reinforced U-shape Bellows under Combined Internal Pressure and Axial Compression Displacement

依据板条梁力学模型,通过初参数法建立了沿波纹管子午向不同位置σ4、σ6应力计算式,结合Mises应力屈服准则,探讨了波纹管在内压和轴向压缩位移作用下的平面失稳工程计算方法。结合相关试验数据,得到了波纹管在内压和轴向压缩位移作用下的平面稳定性判据。试验表明,该计算方法和判据可满足工程应用需求,对波纹管的安全设计具有指导意义。

Engineering calculation method to the in-plane instability of non-reinforced U-shape bellows under combined internal pressure and axial compression displacement is established through calculating formulas for meridional bending stress es due to pressureσ4 and pressureσ6at different positions of bellows based on beam mechanical model.The corresponding criterion of the bellow affected by internal pressure and axial compression displacement is also defined according to experimental data andcalculation.The experimental data shows that the engineering calculation method and criterion are effective to engineeringapplication and safety design of bellows.