对薄壁大开口分段固体发动机卧式对接装配进行研究，应用ANSYS软件对燃烧室在重力作用下的应力、应变云图进行分析，提出变形识别与安全校正是解决结构件形变的一种方法。采用径向圆周10点均分校正法，采集燃烧室对接径向U型件边沿的变形量，制定了燃烧室变形安全校正值，经校正后中段与前段燃烧室对接径向边沿的10个点之间距离最大值为0.02mm。实现了Φ2m/分段式大型发动机对接装配。经Φ2m/分段式发动机地面试车获得成功证实校正值合理。%In this paper, the horizontal docking assembly of segment thin-walled large opening solid rocket motor is analyzed. The stress and strain of combustion chamber under the gravity is analyzed by ANSYS software and then deformation recognition and safe correction are proposed to prevent deformation of structural parts. The radial circular 10 average points correction method is used to collect the deformation amount of docking radial direction of edge of the U-shaped part, and to devise the safety correction value of deformation of single and double combustion chamber. Finally it is proved that the biggest gap of docking radial edge of 10 points between front and middle chamber is 0.02mm using different angle correction. Docking assembly of 2m/ segment solid rocket motor is realized and the correction value is proved reasonable after the success of ground fire test of 2m/segment solid rocket motor.
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