step stress test

Both SY/ T 5044-2003 and API SPEC 11E stipulate no load test and step stress test of the speed reducer and make sure the necessity of analysis on speed reducer system.

在SY/T5044-2003和API SPEC11E中都规定了减速器和抽油机整机的空载试验和分级加载试验，并明确了对减速器进行系统分析的必要性。

The use of orthogonal test method for residual stress testing found that step length on residual stress test results are most significant, impact of slit second and counting time of impact are not significant.

利用正交试验法进行残余应力测试发现：步长对残余应力测试结果的影响最显著，狭缝的影响次之，计数时间影响不显著。

In order to verify the analysis results, static test on two spatial full-sized solid models is carried out, and the step-by-step load apply system is adopted to find out the stress and strain value of each testing point.

为验证计算分析结果，对两个受力较大的铸钢节点进行了足尺实体静力试验，采用分级加卸载制度获取各级荷载下各观测点应力应变值。

With Step-quenching bright oil DF-S, the martensite step-quenching test for bearing component has been made. The test results show that the oil may significantly reduce the deformation and stress, increase crushing load of the steel ball and service life of the bearing.

采用DF-S油对轴承零件进行马氏体等温淬火试验，证明该淬火油可以显著降低变形和应力，提高钢球的压碎载荷及轴承的使用寿命。附图3幅，表3个。

After acetazolamide stress test , rCBF of the hypoperfusion regions in baseline step were significantly increased ( P 0.05 ).

服用乙酰唑胺后, 原脑内低灌注区部位的rCBF均明显增高 ( P0.05 ).