Investigation On The Engineering Prediction Method Of Shock Environment In Ship

As the important operational tool on water, our country committed to develop ship career.Ship operations often get attacked by various weapons, so dynamic response characteristics ofship in underwater explosion impact becomes very important. Before the construction,characteristics and performance of ship should be considered first to the ship design. Initial nodetailed design drawing to build ship model, using numerical method to study the impact ofmarine environment becomes impossible. So research on methods what can be convenientand quick to estimate shock environment has great practical significance.This paper mainly includes four parts. Respectively environment research based onsample library method, shock environment characteristics underwater explosion, engineeringprediction methods study and validation of the forecast formula and cross section samplelibrary method. In order to get reasonable prediction methods, detailed research is done basedon the above several parts.(1)Ship impact environmental problem is studied in this article based on the plane wavetheory, various types of impact factor defined by spherical shock wave theory and the finiteelement algorithm and a set of method is put forward to research ship impact resistanceperformance with the establish of sample library. The mainly ideas of this method is theconsideration of various factors, with important factors to dimensionless, not importantfactors to ignore, the impact environmental sample libraries of three different types of shipunder different impact factors are established based on the above factors research.(2)Based on the data sample library and the statistical analysis of the data distribution, witha lot of impact environmental dimensionless data as the foundation, attenuation rule of theimpact spectrum speed value in the ship structure (including the captain, type deep and beam)is researched and at the same time the relationship between the shock environment and otherdesign parameters (including the parameters of hull structure and blasting) is considered.(3)Based on response law in the shock environment research, forecast formula is consideredto form for application Based on the above work and different working conditions forinterpolation point feature points and interpolation theory (here mainly uses the classic leastsquares theory), with the data mathematical modeling analysis, ship impact environments isfast predicted on engineering. (4)Based on cross section sample library method to form the formula and contrast it withthe in hand formula. Error is calculated to check the accuracy of the formula and the resultindicates the formula of this paper can be used for providing certain reference for theprediction of ship performance and the evaluation of ship design in future.