The muzzle pressure field is the main load of the hatch system of missile launcher when the missile launched underwater,it influences the safety of the hatch,thus calculating the maximal load and moment of hatch is obviously important. The paper uses 11 test data, associates with the research result before,the experience formula of calculating the maximal load and moment of hatch is given by using generalized least squares,and the formula can forecast the maximal load and moment of hatch in a certain extent before the missile launched.%水下发射导弹时,筒口压力场是发射装置筒盖系统的主要外负荷,关系着筒盖的安全,因此计算筒盖上的最大载荷及力矩显得尤为重要.本文利用某型产品11发试验的实测数据,结合前期筒口压力场的研究成果,运用最小二乘法给出了计算筒盖最大载荷及最大载荷力矩的经验公式,能在导弹发射前一定程度上预示某型筒盖受到的最大载荷及最大载荷力矩.
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