论文部分内容阅读
机车车辆领域中大量新的研究表明,越来越多地采用轻型结构可以节约材料、能耗和生产费用。车体采用轻合金,转向架、车轮采用合成纤维材料,用锻造法制造空心轴,以及研制弹性轻型轮对等是近几年的新方案。若结构组件计算了疲劳强度(即很少出现的峰值载荷当作计算的持久作用载荷时),则在限定的使用期内将不可避免地出现许多尺寸过大的零件,由此带来重量的增加,材料及能量消耗增加,工作性能恶化。采用这种方法计算的零件(允许少量的峰值载荷高于疲劳强度)将成为轻型结构优化的重要条
A large number of new studies in the field of rolling stock show that more and more lightweight structures can save material, energy and production costs. Car body with light alloy, bogie, synthetic fiber wheel material, hollow shaft manufacturing forging method, and the development of flexible light-wheel equivalence is the new program in recent years. If the structural component calculates the fatigue strength (ie, the rare peak load is taken as the calculated permanent load), then over the limited life will inevitably appear many oversized parts, which bring the weight Increase, material and energy consumption increase, work performance deteriorated. Parts calculated in this way (allowing small peak loads above the fatigue strength) will be important for light-weight structural optimization