【摘要】 本文利用 Sines方法将脉冲循环内压厚壁圆筒的多向应力问题转化为等效的单轴循环应力 ,再利用 Soderberg疲劳理论提出了一种包含了应力集中系数、尺寸系数和零件的表面加工系数、工作介质系数在内的脉冲循环内压厚壁圆筒疲劳强度设计准则。并用本文公式计算了受脉冲循环内压自支撑端向载荷厚壁筒的疲劳极限压力 P0 ,其计算值与文献 [3 ]中的实验值非常吻合 ,其最大相对误差为 1 0 .8%。同时还得到了受脉冲循环内压自支撑端向载荷厚壁筒疲劳极限压力的计算值与没有轴向力的脉冲循环内压厚壁筒疲劳极限压力计算值的差不大等结论更多还原

【Abstract】 In this article,a fatigue strength design criterion of thick cylinders subjected to pulsating repeated internal pressure is put forward by being converted the multiaxial stresses of thick cylinders under pulsating repeated internal presure to an equivalent stress under uniaxial repeated loading by the means of Sines′ method and applied Soderberg′s fatigue theory.The fatigue strength design criterion derivated in this article includes effects of stress concentration, component size, surface working quality, working medium and et al.The computing values are agreeable well with the experimental values for the pulasting repeated internal pressure limit of thick cylinder supporting its own end loading,and maximum relative error is 10 8%.In addition, it is concluded that the difference of computing value of the pulsating repeated internal pressure limits of thick cylinder is very little between supporting its own end loading and without axial stress.更多还原