首页>
外国专利>
In the forecasting manner of creeping life of the equipment under random stress fluctuating and the random temperature
In the forecasting manner of creeping life of the equipment under random stress fluctuating and the random temperature
展开▼
机译:在随机应力波动和随机温度下设备蠕变寿命的预测方式
展开▼
页面导航
摘要
著录项
相似文献
摘要
PROBLEM TO BE SOLVED: To provide a method for predicting a creep life, when both narrow- band random stress variations and narrow-band random temperature variations are applied on equipment.;SOLUTION: In the method for predicting the creep life of equipment under random stress variations and random temperature variations for obtaining the probability density function of the amount of damage accumulation, on the basis of a Robinson damage sum and to predict the life of the equipment on the basis of the probability density function, (1) a damage coefficient which expresses the amount of damage per unit time is approximated by a linear expression, when the random stress variations and random temperature variations lie within narrow bands, and (2) the random stress variations σ(t)(instant) are expressed by the sum of a time mean value σ(t)(mean) and probability amount of variations σ', and the random temperature variations θ(t)(instant) are expressed by the sum of a time mean value θ(t)(mean) and a probability amount of variations θ'(t).;COPYRIGHT: (C)2001,JPO
展开▼