Results 21 to 30 of about 186 (98)
Jianzhu Gangjiegou Jinzhan平面移动式立体车库容量大、形式多样，对车位分配的要求更高，载荷形式更多样。因此在研究立体车库的载荷谱时，以平面移动式立体车库为代表对其进行研究，运用概率统计方法，基于车辆存取策略建立了适用于立体停车结构的交变载荷谱；进一步采用四点雨流计数法对载荷谱进行统计和边缘分布拟合，结果表明：载荷均值服从均值为9.876，标准差为0.493的正态分布；幅值服从形状参数为1.603，尺度参数为2.048的双参数winbull分布。通过参数外推得到整个生命周期的荷载频次，建立了对应的8级二维载荷谱和一维载荷谱 ...
陈怡芝, 贺拥军
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Jixie chuandong, 2009 The GM（1,1）model in the grey system theory is proposed to predict the test data of fatigue life of gear,the aim is to large1y cut short test time,save test cost,quickly obtain the reliability index.The principle of the grey GM（1,1） model is introduced ...
张延化, 王优强, 卞荣
doaj
Jianzhu Gangjiegou Jinzhan焊接是钢结构广泛采用的连接形式。在提高钢材强度等级后，焊接接头在服役过程中对蚀坑、裂纹等缺陷的敏感度增强，且焊接会劣化钢材成分、组织性能进而导致焊接接头产生初始缺陷。因此，在环境腐蚀、应力集中、超载等因素作用下，钢结构焊缝连接未达到设计服役年限就发生疲劳断裂，造成严重的资源浪费。基于对多因素耦合下高强钢焊缝连接疲劳性能研究现状的总结，介绍了腐蚀疲劳机理及腐蚀预测模型，分析了疲劳设计方法及疲劳寿命评估理论，归纳了焊接残余应力、点蚀坑以及初始裂纹对焊缝连接疲劳性能的影响。结果表明：焊接工艺 ...
郭宏超, 关晓迪, 王铳, 赵越
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Jixie chuandong, 2008 The air cylinder bolts of super high pressure compressor may get fatigue failure after by action of the alternating loads. The analysis methods of fatigue life to the air cylinder bolts are introduced,the fatigue life can calculate according to the rate ...
陈敏, 陈沪, 马立法
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基于ANSYS Workbench某型半挂车驱动桥壳强度分析与疲劳寿命预测
Jixie chuandong, 2014 To further study semi-trailer drive axle housing running and operating characteristics,taking semi-trailer axle for the study object,for the fracture and fatigue phenomena of driving axle trailer in motion process and the problem of the influence of ...
王筱冬
doaj
[Biomechanical analysis of miniplate fixation systems in restorative laminoplasty for spinal canal reconstruction]. [PDF]
Nan Fang Yi Ke Da Xue Xue Bao, 2023 Chen J +5 more
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Jixie chuandong, 2011 Gear box in caterpillar is designed with the static strength theory.While the dynamic characteristics of planetary parts in different working condition is difficult to obtain with the limit of traditional method,so research on reliability and fatigue ...
刁哲军 +4 more
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[Research on the current situations of reliability and evaluation in Chinese active medical device industry]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi, 2022 Zhu J +5 more
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Research progress in circadian rhythms in the application of psychological rehabilitation of cancer patients. [PDF]
Zhong Nan Da Xue Xue Bao Yi Xue Ban, 2022 Luo X +5 more
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