Blast load in confined cabin mainly contains multiple peaks shock waves and long duration quasi-staticover-pressure. In order to investigate on the influence of accuracy of WENO schemes on the blast load inside cabin, a high-resolu-tion 3D code was developed in the present work. 3th, 5thand 7thWENO finite difference scheme were implemented in the code to capture the shock waves generated by condensed explosives in confined cabin. Several Riemann problems such as Sod shock tube, interacting blast waves and shock entropy wave interaction were simulated to investigate on computingper-formance of the schemes preliminary. Then, the code was used to conduct the simulation of blast waves in closed cabin and venting cabin and the influence of accuracy of WENO schemes on the blast load was discussed as well. It is indicated that the accuracy of WENO schemes has great effect on the blast waves and less effect on the quasi-static overpressure.%舰船舱室内爆炸载荷主要包含瞬态多峰值冲击波和持续时间较长的准静态超压,为了研究WENO格式精度对舱室内爆炸载荷影响规律,基于Fortran平台,采用3阶、5阶、7阶WENO有限差分格式,开发了高精度舱室内爆炸载荷三维数值计算程序.采用Sod激波管、双爆轰波碰撞、激波与熵波相互作用等经典算例初步考察了各数值格式的计算性能.开展了封闭舱室、泄压舱室内爆炸载荷数值计算,探讨了WENO格式精度对舱室内爆炸载荷影响规律.研究表明:WENO格式精度对舱室内爆炸冲击波载荷影响较大,对舱室内爆炸准静态超压载荷影响较小.
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