3D analysis of active vibration isolation with wave impeding block in layered ground under vertical loading;

2-D analysis of ground vibration isolation using wave impeding block;

The inviscid Euler drag solution is separated into an induced drag component and a wave drag component.

In the present study, the linearized atmospheric wave equation is solved analytically in a two-layer model to obtain a parameterization scheme for wave drag of gravity waves induced by convective cloud streets.

By using the pseudo 3-D fKdV equation and division of four regions, theoretical mean wave resistances and time change rates of the regional mean energy of the precursor soliton generation in a straight channel with arbitrary section are given theoretically.

Aim at the problem of internal quality testing of high-pressure thin-wall welded steel cylinder pipe workpiece,the advantages of the method of using ultrasonic plate wave are obtained through the comparison of five general nondestructive testing methods by the paper.