| 1. | Longmen grottoes ; vibration environment ; fatigue effect
门石窟振动环境疲劳效应 |
| 2. | Research on vibration environment test technology of aircraft structure
飞机结构件振动环境试验技术初探 |
| 3. | Specification for measurement of human exposure to whole - body vibration environment
人体全身振动环境的测量规范 |
| 4. | The analysis of rock mass fatigue effect under vibration environment in luoyang longmen grottoes
洛阳门石窟岩体振动疲劳效应初析 |
| 5. | The prepressing - force is changed by the state of the prepressing - contact cushion structure , and the slip phenomenon is appeared in the vibration environment
预紧接触式垫层结构中的预紧力是随系统的状态而改变的，在一定的振动环境下，会产生滑移、接触分离等现象。 |
| 6. | To the passenger , a comfortable vibration environment is important not only during driving , but also guarantee them with healthy body and excellent psychological situation when arrival
舒适的振动环境对于乘员,不仅在行驶过程中很重要,而且可以保证到达目的地后以良好的身体和心理状态投入工作。 |
| 7. | Among them , electro - hydraulic servo vibration table is a special kind of vibration environment simulated equipment which is widely used in national defense industry , such as missiles , rockets and satellites
其中电液伺服振动台作为一种独特的振动环境模拟设备在导弹、火箭、卫星等国防工业的发展中有独特的作用。 |
| 8. | By comparing the experimental results in different vibration environments , we find that the interferometer works well in the presence of vibration whose product of amplitude and frequency is less then 50 waves - hz , there is no obvious error caused by vibration
本方案对干涉条纹形状没有要求，成本低、易工程化、适应性强，是一种相对来说效果好而成本低的方案，具有很强的实用性。 |
| 9. | 3 . after analyze to various methods of the synchronous control , decide to utilize a / d and d / a combines with the numerical pid control method to research the pc of synchronous controller and apply to the space vehicle ’ s vibration environment experiment
3 .对同步控制的各种方法进行了分析,结合数字pid控制算法,率先采用计算机自动测量和控制技术,将基于pc的a / d和d / a板卡应用于航天器环境模拟试验的并联双振动台系统中,解决了同步控制器研制的问题。 |
| 10. | With metal fatigue in material mechanics , this paper deduces the limestone fatigue curve of longmen grottoes by means of marble s one within the error permission . by the experiment elects the crucial factors of current vibration environment in longmen grottoes , the author contrasts the result of the experiment with its fatigue curve referred above and analyses the fatigue effect of longmen grottoes . finally , it is pointed out that after longmen grottoes have being suffered weathering and water - erosion more than 1500 years , the vibration environment is becoming an crucial factor leads to fatigue effect , especially in those weak surface carvings just like the crossings of several rifts , serious weathering places , etc
借鉴材料力学中金属疲劳破坏的研究手段，在误差允许范围内用大理岩疲劳曲线推导出门石窟石灰岩疲劳曲线。通过对石窟实际振动环境中典型要素的抽取和振动试验，将试验结果与疲劳曲线进行对比，分析了门石窟的疲劳破坏效应。文章指出，在经历了1500多年的风化和流水溶蚀后，振动环境已成为导致门石窟某些薄弱点如多条裂隙交叉点严重风化酥解的壁面雕刻品等产生疲劳破坏的重要诱发因素。 |
