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钢箱桥塔内部通行孔多为长圆形.采用保角变换和柯西积分方法,对开长圆孔无限大平面的应力场进行求解,通过算例验证其准确性.基于有限元数值模拟,分析板件长宽比和开孔率对有限大板应力集中系数的影响规律,并通过对无限大平面应力集中系数进行有限板宽修正,提出了可用于实际工程的有限大板应力集中系数简化计算公式.
The internal passage holes in the steel box pylons are mostly oval.The stress field of an infinitely large plane with long holes is solved by conformal mapping and Cauchy integral method.According to the numerical example, the accuracy of the stress field is verified.According to the finite element numerical simulation, The influences of plate aspect ratio and open area ratio on the stress concentration factor of finite slab are analyzed. The finite element method is used to simplify the stress concentration factor of finite slab which can be used in practical engineering. Calculation formula.