-
摘要: 基于有限元分析方法,建立速射火炮身管截面的有限元模型,采用直接耦合的方法,模拟了承受热 应力和火药燃气压力的自紧身管在先50连发、冷却后再连发10发过程中身管的残余应力,得到并分析了残 余应力的变化规律,指出内壁薄层的塑性变形和残余应力的反复变化,不利于内壁的稳定,还提出了减小残余 应力变化程度的策略。Abstract: Basedonthefiniteelementanalysissoftware,afiniteelementmodelwasestablishedforthe rapid-firingguncross-sectiontoexploretheresidualstressintheautofrettagedbarrel,whichwasinfluencedbythehigh- temperature,high-pressureandhigh-speedexplosivegaswhenshooting.And thedirectcouplingmethodwasemployedasasolvingstrategytoanalyzetheresidualstressintheautofrettagedbarrelintheprocessof50continuo sshotsfirstand10shotsaftercooling.Investigated resultdisplaysthattherepeatedchangingoftheplasticstrainandresidualstressintheinnerwallis harmfultothestabilizationoftheinnerwall.Andthe measureswereputforwardtoreducethe changeoftheresidualstress.
-
Key words:
- solidmechanics /
- residualstress /
- finiteelementmethod /
- barrel /
- autofrettage /
- rapid-firing gun
点击查看大图
计量
- 文章访问数: 2243
- HTML全文浏览量: 80
- PDF下载量: 214
- 被引次数: 0