序降应力加速寿命试验(上)——试验分析篇

Progressive-down-stress Accelerated Life Testing——Testing Analysis

加速寿命试验是高可靠长寿命型产品的量化评估的重要途径,广泛应用于武器装备的定寿延寿课题中。为了进一步提高加速寿命试验的效率,提出一种新的试验方法——序降应力加速寿命试验。通过理论模型建立、试验数据分析和蒙特卡罗仿真对该方法的有效性进行分析。研究结果表明,在相同的试验环境下序降应力加速寿命试验方法不但能大幅度提高试验效率,同时还能提高试验分析精度。因此,在武器装备的定寿延寿课题中,序降应力加速寿命试验值得推广。

Accelerated Life Testing （ALT） is an important way to evaluate the reliability of highreliability long-life equipment,which have been widely used in reliability assessment of military products. In order to further enhance the efficiency of ALT, the paper presents a new testing method - Progressive-down-stress ALT. Through theoretical modeling,experimental data analysis and Monte- Carlo simulation ,the effectiveness of this new method is researched. Research findings show that Progressive-down-stress ALT not only can greatly improve test efficiency,but also will improve the analysis accuracy under the same test environment. Therefore, Progressive-down-stress ALT should be promoted in issues of military product life-determination and life-extension.