Research on higher-order resonance characteristics of duct-water coupled components in rectangular aqueduct bridge 矩型渡槽槽-水耦合体高阶共振特性研究
The bridge wind fairing is the design measure taken for decreasing the resonance of the deck structure caused by the strong wind, and is a composed part of the bridge structure. 桥梁风嘴是为了减少强风对桥面结构引起的谐振而采取的设计措施,是桥梁结构的组成部分。
Jinwei PVC/ NBR is so high in its resiliency that it can reduce vibration and resonance of chilled and hot water systems when being used, which prevents the cold bridge as well as heat bridge. 金威橡塑海绵材料具有很高的弹性,因而能最大限度地减少冷冻水和热水管道在使用过程中的振动和共振,防止出现冷桥和热桥。
When the first vertical frequency of the bridge equals to the ratio of vehicle speed to the vehicle length, the resonance of the bridge occurs. 当桥梁第一阶竖向自振频率等于车辆速度与车辆长度之比时,会发生共振。
The dynamical analysis results proved that the vibration energy dissipation can effectively reduce the resonance response of the bridge. 分析表明,采用消能减振设计可有效地削减天桥的共振反应。
It is pointed out that the parametric resonance may occur in the cable stayed bridge due to the deck vibration under certain conditions. 通过对数值结果的分析指出,在一定条件下,拉索可能由于桥面振动的激发而发生参数共振现象,对桥梁的安全性带来不利影响。
It can reduce the resonance current of the capacitors bridge in DC side while making the content of harmonic lower. 它不仅降低了谐波含量,同时也减少了直流侧电容桥上的谐振电流。
The vertical resonance character of a steel plate girder bridge with 32 m in span is also analyzed. The vertical resonance is found not the dominant factor in the vertical stiffness of the bridge, because the resonance does not increase the maximum dynamic deflections in the span. 本文分析了提速客车以160km·h-1的车速通过32m下承式钢板梁桥时的竖向共振特性,竖向共振没有使主梁动挠度最大值增加,不是桥梁竖向刚度的控制因素。
The resonance conditions of the train-bridge system are affected by the span, total length, lateral and vertical stiffness of the bridge, the compositions of the train, and the axle arrangements and natural frequencies of the vehicles. 车桥系统的共振条件与桥梁跨度、长度及竖向和横向刚度,列车编组、车辆轴距参数及车辆的自振频率等因素有关。
Using open ring control method, the active moment control to moving load may reduce the moving response and remove the resonance of the bridge. Because a large amount of application of bridge structure on expressway, it is necessary to consider the car-bridge action synthetically. 在不考虑车&桥耦合的情况下,应用开环控制方法,对有移动荷载经过的桥梁实施主动弯矩控制,可以有效地减少桥梁的动态响应,并且可以消除桥梁的共振。
To avoid the most dangerous resonance, the first vertical frequency of the bridge should be greater than the ratio of the maximum vehicle speed to the vehicle length in design. 为避免桥梁共振,设计时应满足第一阶竖向自振频率大于车辆最大速度与车辆长度的比值。
The frequency of ultrasonic generator can trace the transducer mechanical resonance frequency with the help of motional bridge feed-back circuits. 超声发声器采用动态阻抗桥反馈电路,使发生器的频率能自动跟踪机械谐振频率;
Numerical Study on Parametric Resonance of Coupled Cables and Bridge Tower 斜拉桥索塔参数共振的数值研究
The resonance velocity and its corresponding peak values obtained by the simulator program for an actual framed arch bridge provide an important basis to restrain the vehicle-bridge vibration. 仿真计算得到的实桥共振速度及其对应的跨中竖向振幅峰值,为阻尼抑振提供理论依据。
Fluorescence resonance energy transfer ( FRET) plays an important part in the design of fluorescent dyes and has become an essential bridge connecting organic chemistry and other fields. 荧光共振能量转移(FRET)在荧光染料分子的设计中起着举足轻重的作用,已成为有机化学在各个领域应用的不可或缺的重要桥梁。
On the one hand, of the details to the depth to the inner world, the works are distributed by emotions and the emotions of the readers mind to reach a resonance, bridge the gap between them. 一方面,作者将细节纵深到人的内心世界,使作品所散发的情感与读者心灵的情感达成共鸣,拉近他们之间的距离。
Research shows that the self-excited resonance phenomenon of cables may be occurred, when the lateral vibration frequencies of the cables generated by the bridge deck vibration close to the half value of some bridge deck frequency. 研究表明,由于桥面振动而激发的拉索横向振动的频率接近于桥面某一阶频率的一半时,拉索将可能产生自激共振现象。