关键词: 固体推进剂火箭发动机;火箭发动机壳体;冲击载荷;冲击响应

Abstract: The paper introduces paramenter γ in differential equations on the basis Of Wilson-θmethod in order to adjust the displacement terms and initial conditions. The paper presents modifiedexpressions of dynamic equations and initial conditions, and derives the direct approximation operatormatrix of the modified integration Wilson-θ method. By calculating the spectral decorpposition of theapproximation operator matrix, the paper has analyzed the stability of the modified method and hasshown that the method can obtain unconditional stability. This paper has discussed choose extent ofthe coefficient γ. The modified method has been verified in examples and experiments.

Key words: Solid propellant rocket engine;Rocket engine case;Shock load;Shock response