Abstract: In this paper, the regulation of the impulsive responses on double cylinder shell structure is analyzed with the application of average spectrum velocity. The average spectrum velocity can well describe the environmental energy of the impulsive responses. The software of ABAQUS is employed to establish a double cylinder shell structure model and simulate the environment of underwater explosion. Using software MATLAB/SIMULINK, the acceleration of each node is computed with the method of shock spectrum, and the spectrum velocity is analyzed with statistical method. It shows that impulsive factor can describe the strong or weak degree of the impulsive environment but it also has some limitation. Moreover, when the double cylinder shell structure model applied in this paper with the range of frequency 1 500 Hz, dimensionless explosion distance x > 1.5 as well as the same impulsive factor C , the impulsive environment of double cylinder shell structure is equivalent.