自由振动衰减法,free vibration attenuation method
1)free vibration attenuation method自由振动衰减法
2)damped free vibration自由衰减振动
1.Discrete spectrum analysis for amplitude correction ofdamped free vibration response;基于离散频谱分析的自由衰减振动信号的幅值恢复
3)free vibration attenuation wave自由振动衰减曲线
4)free vibration method自由衰减法
英文短句/例句
1.Two kinds of concrete specimens, one is crumb rubber concrete( CRC) and the other is controlled concrete, are tested as a cantilever beam for measuring their damping coefficients by the free attenuation method.本文采用自由衰减法,对两组橡胶集料混凝土及普通混凝土小型悬臂梁的阻尼比进行了测定。
2.Free Damping Test Method for Vibration Characteristics of Microstructures;微结构振动特性的自由衰减测试方法
3.free damping oscillation vibrometer自由衰减振荡示振仪
4.Degenerative Transfer (DT) Polymerization of Vinyl Acetate;衰减链转移自由基(DT)聚合醋酸乙烯酯
5.Analysis of FID Signal in Pulse NMR Experiment;脉冲核磁共振实验自由衰减信号分析
6.Numerical Simulation of Ship Free Roll Decay Motion in Viscous Flow黏性流中船舶自由横摇衰减运动数值模拟
7.An Adaptive Fading Factor Filter Algorithm Based on "Current" Statistical Model基于“当前”统计模型的衰减因子自适应跟踪算法
8.The Atom Transfer Radical Polymerization and Degenerative Transfer Polymerization Initiated by Initiator Formed in Situ原位合成引发剂引发原子转移自由基及衰减链转移同步聚合
9.The Energy Decay of Cantilever Timoshenko Beam with Local Viscoelastic Damping on the Free End自由端具有局部粘弹性阻尼的悬臂Timoshenko梁的能量衰减问题的研究
10.Cone Plate Blood Rheological Automatic Test System Based on Velocity Attenuation Method基于速度衰减法的锥板式血液流变自动测试系统
11.Lunar Probe Autonomous Navigation Based on the Nonlinear Strong Tracking Filtering一种强跟踪非线性衰减滤波的环月自主导航方法研究
12.An Adaptive Scaling Hybrid Algorithm for Reduction of CT Artifacts Caused by Metal Objects基于自适应衰减滤波的CT图像去金属伪影混合算法
13.High amplitude noise attenuation based on Gabor transform基于Gabor变换自适应噪声衰减
14.Local characteristics in converging-diverging tube with delaying self-sustaining swirl flow缩放管内带衰减性自旋流的局部性能
15.Automatic Testing System of Attenuator Based on Visual Basic 6.0基于Visual Basic 6.0的衰减器自动校准系统
16.Automatic Calibration of Large Attenuation Based on Visual Basic 6.0基于Visual Basic 6.0的大衰减量的自动校准
17.attenuation compensator衰减均衡器衰减补偿器
18.Test method of attenuation stability for radio-frequency cablesGB/T4098.6-1983射频电缆衰减稳定性试验方法
相关短句/例句
damped free vibration自由衰减振动
1.Discrete spectrum analysis for amplitude correction ofdamped free vibration response;基于离散频谱分析的自由衰减振动信号的幅值恢复
3)free vibration attenuation wave自由振动衰减曲线
4)free vibration method自由衰减法
5)free damping oscillation vibrometer自由衰减振荡示振仪
6)free damping自由衰减
1.A micro-cantilever and a micro-membrane, which are both attached with piezoelectric devices, are excited respectively by the ramp pulse signal and producefree damping motion.附有压电驱动的微悬臂梁和微振动薄膜在斜波脉冲激励信号作用下产生自由衰减振动,通过激光多普勒测振仪将瞬态运动速度转换为模拟信号,经数据采集卡数字化后送入计算机,对其振动特性进行分析。
延伸阅读
衰减振动衰减振动attenuationvibration系统受初扰动后不再受外界激励,因受到阻力造成能量损失而位移峰值渐减的振动。又称阻尼振动。例如带阻尼器的弹簧质量系统,其质量为m,弹簧刚度为k,阻尼系数为c,在回复力和阻力作用下作衰减振动的运动微分方程为,式中为无阻尼自由振动的角频率;ζ=c/(2mωn)为阻尼率。若阻尼较小(ζ<1),则振动方程的解为,式中A和j为初始条件确定的常量。严格地说,衰减振动不是周期运动,因其位移峰值按时间的指数规律衰减。但习惯上,仍将同侧相继两位移峰值间的时间间隔称为“周期”,记为Td;相应的称为“角频率”,记为ωd。因此,,即衰减振动通过同侧两相邻的位移峰值所经历的时间大于无阻尼时的周期。通常用对数减幅率δ来量度位移峰值衰减的快慢。其定义是同侧相继两位移峰值之比的自然对数,即。当ζ很小时,阻尼对振动频率影响很小,但使其位移峰值衰减很快。若阻尼较大(ζ≥1),则振动方程的解为:;(ζ>1)。这时,运动不再是振动,在任何初始条件下,位移最多有一次达到峰值,以后就是无限趋近于平衡位置的衰减运动。通常把ζ>1的情况称为过阻尼;把ζ=1的情况称为临界阻尼,即阻尼的大小刚好使系统作非“周期”运动。与阻尼较小的情况和过阻尼情况相比,在临界阻尼情况下,系统从运动趋近平衡所需的时间最短。在电气仪表中常利用过阻尼或临界阻尼抑制指针振动。