| 1. | Liquid density measurement by vibration methods
用振动方法测量流体密度 |
| 2. | Method for test of tinear density ofchemicat fibers for import . vibration method
进口化学纤维线密度测定.振动仪法 |
| 3. | Analysis of the acoustic propagation properties under the sea with normal vibration method
用简正波方法分析声波在海水中的传播特性 |
| 4. | Simulations for identification of flutter derivatives of bridge section using the coupled - forced - vibration method
桥梁颤振导数的耦合强迫振动仿真识别 |
| 5. | 1902 - 703 methods of testing refractory materials - unshaped refractories used in monolithic construction - preparation of test pieces from dense castables by vibration method 1902 - 703
耐火材料试验方法.第7部分:整体结构用未成形耐火材料.第3节:振动密实浇注试件制备 |
| 6. | Ltd . . a coupled vibration method on suspended free poles is employed to determine the initial young ' s modulus at elevated temperatures , also the thermal expansion coefficients of fire - resistant steel
通过高温下的恒温加载拉伸试验，得到不同温度下耐火钢的屈服强度、极限强度、延伸率、面缩率和应力应变关系，并测定高温下耐火钢的热膨胀系数，采用悬丝耦合共振法测定高温下耐火钢的初始弹性模量。 |
| 7. | The working process of the bearing with low speed and high load ( converter trunnion bearing ) is monitored through vibration method and lots of field data are obtained . a industrial micro computer diagnosing system has been constructed for the detection of the defects of trunnion bearings
本文叙述了转炉耳轴轴承故障诊断的必要性,对低速重载轴承故障的类型和特性进行了分析,采用振动监测法对一种低速重载轴承- -转炉耳轴轴承的运行进行监测。 |
| 8. | The result of the experiment shows that the proposed forced vibration method device has the quality of stability and repetitiveness of the data , the wide range of the testable reduced velocity , the exactness of coupled and direct flutter derivatives . and it does not need to employ any complicated identification system to check it further
结果显示：本文提出的强迫振动法装置具有试验数据稳定、数据重复性好、可测量的折减风速范围宽、交叉项导数与对角项导数具有同等精度和不需要复杂的系统识别过程等一系列优点。 |
| 9. | As to the current problems existing in the identification for these flutter derivatives , the dissertation tries to trace the development in the identification for the past unsteady aerodynamic forces of long - span bridges . it also investigates the method for flutter and buffeting analysis and the flutter derivatives . based on the present methods used in obtaining the unsteady aerodynamic forces and flutter derivatives , and co - funded by a natural scientific fund from the nation and a key project fund from the railway ministry , the current research has attempted to develop a device which can be employed in the wind tunnel to test flutter derivative through a forced vibration method
鉴于目前桥梁断面颤振导数识别的水平和存在的问题，本文通过对大跨度桥梁非定常气动力、颤振分析方法及颤振导数识别方法的回顾和评述，基于现有的非定常气动力和颤振导数的测试方法，在国家自然科学基金与铁道部重点学科基金的联合资助下，研究开发了一套在风洞中采用强迫振动法测试颤振导数的装置。 |
| 10. | The focus of the research of checking bridge is an application of vibration method in checking bridge scathelessly , but the problem of damage identification is one of awaiting solving problems , and the answer of the adverse question for this kind of damage is often not only , which is just the difficulty of the question
用振动法对桥梁的无损检测是桥梁检测研究的热点，而损伤识别问题是其中一个有待解决的问题，难点是对这类损伤的逆问题的解答往往不是唯一的。 |
