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发布时间:2022-03-23 13:50
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热心网友
时间:2022-03-23 15:19
人工翻译中~请稍候~
在这些测试当中,在桥梁的很多地方都进行了温度测量,在这些试验中发现,24小时之内,微波光双工天线链路的频率变化变动范围接近于5%。这些变化被发现和桥面温度差异有紧密联系。相似的桥面温度差异变化和相互关系在一年之后的实验反馈中被发现了。
为了调查研究由交通车辆所造成的变化性,对桥上的四辆汽车进行了微波光双工天线链路实验,并将实验结果同没有车在桥上的情况进行了比较。假定与新增的质量相比,停放在桥面上的汽车对结构动力学完全没有影响的话,那么它们应会以一个数值与质量平方根成正比的速度来降低频率而此实验中,这个数值大致是6.4%。当这个结果在当天同等条件下(再次实验,以减小热量对实验的影响)与再次实验的微波光双工天线链路实验结果比较时,这个结果并未被发现。造成次结果的原因当时并未被察觉,这个结果被假设为是由交通车辆所造成的,而且它们的悬挂系统产生了更加复杂的机能系统,在此系统中,质量的改变不足以解释动力性能的变化以及由交通车辆造成的管线变形量及其临界状态的变化。
为了调查由极电所导致的变化性进行了运用粗纱锤碰撞法信号源测试,单点信号源测试,外界信号源测试。而信号的来源是过桥的单独车辆的外界信号源以及电板力学专门人士。
以上~
专业词汇真是多啊~
热心网友
时间:2022-03-23 16:37
这些测试是在温度测量
made at various locations on the bridge.是在不同地点的桥梁。 The modal frequencies were found to vary模态频率,发现不同
approximately 5% ring this 24-hour time period.约5%,与此24小时的时间。 These changes were found to be related to the这些变化被发现相关的
emperature differentials across the deck.整个甲板emperature差距。 Similar variations and correlation with deck相似性和相关性与甲板
emperature differentials were observed when the tests were repeated a year later. emperature差距时,观察测试是重复的一年后。
To investigate the variability caused by vehicle weight, modal tests were performed with four调查按车辆重量所造成的变异,模态试验,完成四
cars parked on the bridge and the results were compared to those obtained from modal tests汽车停在大桥和结果进行了比较,从所得的模态试验
without cars on the deck.无车甲板上。 Assuming the parked cars have no effects on the dynamics of the假设一辆车有对动态无影响
tructure other than the addition of mass, they should lower the frequencies by a value tructure比其他大规模此外,应降低一个值的频率
proportional to the square root of the mass ratios, in this case approximately 6.4%.成正比的质量比平方根在这种情况下,约6.4%。 This result这个结果
was not observed in the measured modal frequencies when they were compared to the没有观察到模态频率测量时,他们比
requencies from a test performed at a similar time of the day (again, to minimize thermal从在的一天(再次,类似的时间进行测试,以尽量减少热requencies
effects).影响)。 The reasons for this result are not understood at this time.这一结果的原因是不明白在这个时候。 This result is assumed to be这一结果被假定为
caused by the vehicles and their suspension systems forming a more complex dynamic system所造成的车辆,形成更复杂的动态系统中的悬挂系统
where the change in mass is not sufficient to account for the change in dynamic property and/or在该过程中的质量变化是不够的帐户,在动力性能和变更/或
he deflections proced by the vehicles causing a change in the boundary conditions.在所造成的边界条件的变化,他的车辆产生的挠度。
To investigate the variability caused by excitation source tests were performed using roving调查由激励源试验引起的变异是利用巡回演出
hammer impact excitation, single point impact excitation, ambient excitation from traffic on an锤碰撞激发,单点碰撞激发,从交通环境激励的一
adjacent bridge, ambient excitation from a single car driven over the bridge, and from相邻的桥梁,从过去单一的汽车驱动桥环境激励,从
electrodynamic shakers电动振动台