针对核电常规岛用螺栓拉伸器具有超高压、超小空间作业工况的特性，提出一种基于数值分析与实验相接合的设计方法，运用ANSYS软件对螺栓拉伸器关键结构---缸体与螺帽进行有限元校核，并与测定的应变实验数据进行对比；同时分析参数Rm、D对螺帽结构的优化特性。研究结果表明：初设的缸体强度和刚度满足材料的要求，但螺帽在“L型”截面拐点处出现“负”安全系数；优化螺帽结构尺寸，当Rm ＝8 mm，D＝60 mm时与初设参数相比应力减小了121.2％，应变减小了58％，安全系数得到极大提高，这为该设备的可靠性和安全性提供了设计依据。%Aiming at the characteristics that the bolt stretcher for conventional island of nuclear power has the ultra high pres-sure,ultra small space operation conditions,a design method based on numerical analysis and experiment was presented,the ANSYS software was used to check the cylinder block and blind nut,and the analysis results were compared with the experimental strain data. The optimization characteristices of the parameters Rm ,D on the blind nut were analyzed. The results show that:the strength and stiff-ness of first set of cylinder block can meet the material requirements,but the blind nut has“negative”safety factor in the inflection point of“L”section;optimizing the blind nut structure size,when Rm and D are equal to 8 mm and 60 mm respectively,the stress de-creases by 121.2% and the strain decreases by 58% comparing with initial parameters,the safety coefficient is heightened,which pro-vides design basis for the reliability and safety of the equipment.
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