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角振幅增大会使返回舱的平均俯仰阻尼增加，马赫数增大使俯仰阻尼降低。 The average effective pitch damping increases with increasing Angle of oscillation amplitude and decreases with increasing Mach number. | ||
机忻魅振动 （2学分）内容撮要：单自在度系统：自在振动、有阻尼受迫振动和无阻尼受迫振动； Mechanical vibration (2 credits) Summary: The single degree of freedom systems: free vibration, forced vibration damped and forced vibration damping; | ||
对数螺线方法是描述阻尼谐振动的一个好方法。 The logarithmic spiral method is a good way of describing damped harmonic motion. | ||
对于同一类土，饱和土体阻尼作用大于非饱和土体。 And damp in saturated soil was larger than that in unsaturated one. | ||
研究耐高温镍基合金各向异性阻尼特性的建模与识别。 The modeling and identification of anisotropic damping property of Ni based single crystal alloys are presented. | ||
确定了该阻尼器的结构，建立了阻尼器的阻尼力矩模型。 The structure of the damper is determined, and a damping torque model is established. | ||
加装了阻尼装置，减少了焊接飞溅，保证了焊工的安全操作。 Equipped with damping device, reduces the welding spatter, and ensures welder's safety. | ||
氧化锌和硫黄硫化体系不能有效地将阻尼温域向高温方向拓展。 Neither zinc oxide nor sulfur vulcanization system would shift the damping temperature range upwards effectively. | ||
研究含外力和阻尼项一类梁的横振动方程解的率减率。 We study the decay rate of solutions of beam equations with damping and external force. | ||
粘弹性阻尼器通过改变桥梁结构的频率和阻尼比来达到减振目的。 The viscoelastic damper reduces the dynamic amplitude of bridge structure through change the frequency and damper ratio. | ||
