Based on the equivalent elastic sphere model, the source parameters (seismie moments, stress drops and source dimensions) for small earthquakes, which occurred in and near the source region, as well as the Q values of corresponding paths are determined in terms of analyses of the slopes and the low-frequency components of the spectra of seismic P waves, before and after the Haicheng (海城) earthquake (M= 7.3).

Sound scattering from partially fluid-filled elastic sphere shell at low frequency

部分充水结构弹性球壳的低频声散射特性

Method Elastic sphere model embracing incompresive liquid was adopted to study in vitro mechanical properties of zona pellucida of baffalo oocytes by using micropipette aspiration technique.

On the Role of Surface Forces in Contact Interaction between Elastic Sphere and Hard Surface

The works preformed earlier were reviewed briefly, and the new problem of the contact interaction between the elastic sphere and hard surface was formulated.

Radial oscillations of an elastic sphere in a compressible fluid

Dynamical formation of cavity in a composed hyper-elastic sphere

Void formation and growth for a class of compressible hyper-elastic sphere

Based on the equivalent elastic sphere model, the source parameters (seismie moments, stress drops and source dimensions) for small earthquakes, which occurred in and near the source region, as well as the Q values of corresponding paths are determined in terms of analyses of the slopes and the low-frequency components of the spectra of seismic P waves, before and after the Haicheng (海城) earthquake (M= 7.3).The results are that (1) the stress drops for small earthquakes of nearly the same magnitudes, which occurred...

Based on the equivalent elastic sphere model, the source parameters (seismie moments, stress drops and source dimensions) for small earthquakes, which occurred in and near the source region, as well as the Q values of corresponding paths are determined in terms of analyses of the slopes and the low-frequency components of the spectra of seismic P waves, before and after the Haicheng (海城) earthquake (M= 7.3).The results are that (1) the stress drops for small earthquakes of nearly the same magnitudes, which occurred in the source region and along the NE trending fault zone before the Haichang earthquake are higher than those after. On the contrary, their source dimensions before the Haieheng earthquake are smaller than those after. (2) The region of accumulation of strain energy for Haicheng earthquake is larger than the aftershock area. It appears that the movement of NE faulting probably plays an important role in the process of preparation of the Haicheng earthquake. (3) The Q-value around the source region is about 500-600 and very uniform before the Haicheng earthquake; but after the earthquake, there is marked decrease of the Q value in the south-west direction of the epicenter, amounting to about 180.In this paper, we also make a preliminary analysis of the possibility of predicting earthquakes with the use of the source parameters of earthquake swarm, in combination with informations obtained from the characteristic features of the regional geological structure and other precursory phenomena.

Based on the method of approximate aualysis suggested in an earlier paper[8], axisymmetrie and nonsymmetric vibrations of spherical shells are studied in this paper. The half subtended angle β of the shell maybe equal to any given value from o to π. Some numerical results are calculated and compared with those given in the current literatures, Simplified formulas for determinning frequencies of vibrations in spherical shells, which are sufficiently accurate for the purpose of engineering design, are also proposed....

Based on the method of approximate aualysis suggested in an earlier paper[8], axisymmetrie and nonsymmetric vibrations of spherical shells are studied in this paper. The half subtended angle β of the shell maybe equal to any given value from o to π. Some numerical results are calculated and compared with those given in the current literatures, Simplified formulas for determinning frequencies of vibrations in spherical shells, which are sufficiently accurate for the purpose of engineering design, are also proposed.

The impact of elastic systems is a complicated nonlinear phenomenon.By an analysisof the fundamental central impact of two elastic solids,we have demonstrated that thisnonlinear impact phenomenon may be linearized,qualitatively and quantitatively with anequivalent spring and an equivalent initial velocity.Thus,the impact problem of elasticsystems may be reduced to an appropriate free vibration initial value problem for a line-arized system for which the general solutions are deduced in this paper.Numerical ex-amples...

The impact of elastic systems is a complicated nonlinear phenomenon.By an analysisof the fundamental central impact of two elastic solids,we have demonstrated that thisnonlinear impact phenomenon may be linearized,qualitatively and quantitatively with anequivalent spring and an equivalent initial velocity.Thus,the impact problem of elasticsystems may be reduced to an appropriate free vibration initial value problem for a line-arized system for which the general solutions are deduced in this paper.Numerical ex-amples show that the method proposed is both simple and efficient.