Under the action of shock wave due to non-contact underwater explosion, ships with small size or large stiffness will have the response of large rigid-body motion. Based on Taylor plate equation, and taking the additional mass of transverse motion into account, the kinematic equations of 2D cross-section under the shock wave action due to the non-contact underwater explosion were established. And the response of the rigid body motion of a ship to the explosion was calculated. The results are in good agreement with the experimental data, which shows that the present method can be applied in prediction of motion response of ships under shock wave action.

The anti-shock capability of marine equipment is measured by shock limited load, which is the important content of marine anti-shock research. The shock limited load can be used to select equipments and to design vibration isolation system. Shock limited load is the inherence characteristic of equipment. Input acceleration or shock spectrum is used to measure the shock limited load. The shock failure rule of marine diesel engine includes stress limit, strain limit, displacement limit and failure of connecting structures. Shock response simulation analysis of TBD234V6 diesel engine was done in this paper. It was found that under the shock load prescribed by BV043/85 standard, the stress exceeds the limitation value in the stop condition. The relative deformation between two parts can reach one or two millimeters, which indicates that the parts in assembling should avoid interference from the others. Specially, the deformation of crankshaft showed that the oil film is destroyed. Thus, the engine should be isolated. The shock response of the bolted joints of the engine base was calculated. The results indicated that the bolted joints are separated.

According to the characteristics of shock resistance computation for pipeline system, a simple method based on beam theory was presented. It was found that the computational result is in good accordance with that from the finite element simulation. Thus, this method provides a good reference for shock resistance design of the pipeline systems.

The dynamic crush behavior of an anti-shock layer with elastic foundation was investigated. Considering the hyperelastic and viscoelastic behavior of the material, the shock resistance capacity of the anti-shock layer was analyzed. Influence of the structure parameters, such as relative density, edge length and topological shape, on the anti-shock performance of the layer was studied. It was found that in low frequency range the shock spectrum is lower when the relative density and the edge length of the layer are smaller, and round hole is the best choice for the anti-shock layer. While in high and middle frequency range, the anti-symmetric honeycomb structures have the best dynamic performance. On the base of the analysis, the optimization design, called anti-shock double-layer structure, has been provided, which has excellent dynamic performance compared to the traditional anti-shock layer.