In order to support the loading tests, the influence of different load (uniform or non-uniform lateral pressure on all column section or uniform pressure on local part) to chamber's stability behavior were studied.buckling load and curves for three true states are acquired buckling analysis of solid rocket motor chamber in three true states are carried out by finite-element software.It is shown that buckling load under uniform pressure on all column section is lowest.Occurance positions of buckling curve in three states are different, the test result of uniform lateral pressure on all column section can't represented the other two states.Considering the different calculated results of three states, different load validating project is necessary to each test.%应用有限元软件开展了燃烧室全筒段均压、全筒段分布式外压、局部均压三种状态外压稳定性分析,得到了三种状态的失稳载荷和屈曲波形,为不同载荷分布的外压试验方案的制定提供理论基础.分析表明:三种状态中全筒段均压状态的失稳载荷最低,三种状态的屈曲波发生部位也不一样.全筒段均压状态的外压试验结果不能代表分布式或局部外压下的承载能力,不同外压载荷的分布形式应采取不同的载荷验证试验方案.
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