The effect of damping-ratio and mass-ratio on Flow Induced Motion energy harnessing of a square cylinder are numerically investigated for Reynolds number 15500 doi:10.1016/j.energy.2017.11.153Zhang, BaoshouNorthwestern Polytech UnivMao, ZhaoyongNorthwestern Polytech UnivSong, BaoweiNorthwestern Polytech ...
The modulus degradation curves,G(γ)/Gmax, and the damping ratio,D(γ), of 27 clean quartz sands with specially mixed grain size distribution curves were measured in approximately 280 resonant column tests. For each material, tests with various pressures and densities were performed. Based on th...
The effect of non-plastic fines on the shear modulus of sand鈥揻ines mixtures is dependent on FC. The damping ratio of various mixtures initially increases and then decreases with increasing FC. The addition of fines will increase the damping ratio. Moreover, the damping ratio of plastic fines...
The stability of the solution is thus one of the most important characteristics of self-synchronization. In this paper, to stabilize periodic solutions suitable for application to vibratory machines, the effects of the damping of the rigid body and the moment of inertia of the rotors on stability...
The effect of temperature on the dynamic parameters of silty clay in a seasonally frozen region was assessed using a GDS dynamic triaxial test system. The strength parameters, dynamic elastic modulus, damping ratio, and other dynamic parameters of the soil samples were analyzed under different temper...
the electric current produces a damping like torque (DL)-SOT15,16, and the DMI effective field, deriving from a chiral energy contribution, imposes a Néel DW structure4. In this configuration, the magnetization of the DWs is parallel to the current (Fig.1a), which makes the SOT most effi...
Acoustic damping ratioPerforated plateTransfer matrix methodSimilarityIn heat exchangers like a boiler, as a tube bank is set in a duct the alternative ... K Ishihara - 《Transactions of the Jsme》 被引量: 0发表: 2020年 加载更多来源期刊 effect of a plate with damping on the acoustic field...
Using an effective damper mass ratio of 0.026, three different techniques were used to design an optimum tuned-mass damper (TMD) for the prototype. All were found to give essentially the same design. The response of the idealized prototype building to a strong ground motion was computed with ...
In addition, it effectively reduces the expansiveness of the clay soil. The cyclic triaxial results show increase of 19–45% in shear modulus and decrease of 15–33% in damping ratio of OSEM, representing substantial improvement in its dynamic properties. The XRD spectrum of OSEM specimen ...
Damping matrix K s : Stiffness matrix U : Displacement vector, m F : External excitations, N ω : Natural frequency of the simple harmonic vibration, Hz t : Damping ratio S : Resonance margin n cs : Critical speed, r/min n os : Operating speed, r/min References X. Ye...