2) fatigue performance tests with two-amplitude loadings
两级荷载疲劳试验
3) two step loading
两级加载
1.
In this paper,the statistical characteristic of short fatigue cracks growth at the side of small holes under two step loading was studied by means of rotating bending tests on round bar specimens with small holes.
通过正火３５钢带孔圆棒试样的旋弯疲劳试验，研究了两级加载下孔边疲劳短裂纹扩展的统计特性，以及应力水平改变对疲劳短裂纹扩展的影响。
4) multilevel load
多级载荷
1.
Based on the Miner method about the cumulating fatigue damage and the S-N(stress life) curve,the equivalent stress and the intensity criterion are deduced under the multilevel loads with changing range.
依据累积疲劳损伤法-迈纳(Miner)法和应力寿命曲线(S-N)推导变幅多级载荷下等效应力及强度判据公式;结合ANSYS有限元分析软件和柯顿-多兰(Certon-Dolan)理论,通过APDL(Ansys Pa- rameter Design Language)参数化建模,分析出不同载荷下应力集中的部位,将有限元网格划分的危险部位节点单元的应力值取出,代入理论公式估算疲劳寿命,具体分析多级载荷加载次序对疲劳寿命的影响,比较Miner方法和Certon-Dolan方法优劣,并提供设计参考数据和理论判据。
5) Load grade
荷载等级
1.
The paper has systematically discussed that the key technique of which parameter of natural mixed soilstrength has been entirely confirmed by large-sized shear test, including density determining on fie1d, installingsample skills, setting load grade, stabilizing time and magnitude of normal stress grade, drawing of σ-τ curve inlarge-sized shear test, sampling principle of intensive parameter, etc.
系统地论述了通过大剪试验确定天然混合土强度参数的全过程的关键技术,包括野外现场密度测定、试验装样技巧、荷载等级设置、正应力荷载等级稳定时间与稳定量级、大剪试验σ-τ关系曲线绘制、强度参数的取值原则等,形成了一套较为完整的大剪试验技术,为类似的大剪试验提供了完整的强度参数取值操作方法,具有一定的借鉴意义。
6) M_A loading
城A级荷载
补充资料：FG正负两级气流干燥机
技术参数
型号 | FG0.25 | FG0.5 | FG0.9 | FG1.5 | FG2.0 | FG2.5 | FG3.0 | FG3.5 |
蒸发水份(kg/h) | 113 | 225 | 450 | 675 | 900 | 1125 | 1150 | 1491 |
| 功率配备(kw) | 11 | 18.5 | 30 | 50 | 75 | 90 | 110 | 110 |
| 占地面积(m2) | 3.5×2.5 | 7×5 | 7×6.5 | 8×7 | 11×7 | 12×7 | 14×10 | 14×10 |
| 热效率(%) | >80 | >80 | >80 | >80 | >80 | >80 | >80 | >80 |
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条