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本文利用变分原理,分别推导出具有初始不圆度的埋藏式压力钢管在极限平衡条件下的临界外压力公式以及弹性稳定条件下的临界外压力公式,并讨论了初始不圆度对第一种临界外压力的影响以及埋藏式钢管在外压力作用下的屈曲破坏机理和合理的计算方法。
In this paper, by using the principle of variational principle, the formulas of critical external pressure under the condition of ultimate equilibrium and the formula of critical external pressure under the condition of elastic stability are respectively deduced. The effects of the initial out-of- The critical pressure and the buckling failure mechanism and reasonable calculation method of buried pipe under external pressure.