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轴向载荷下双金属机械复合管界面紧密度研究

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为研究应用于油气田集输和海洋工程等领域的双金属机械复合管界面的紧密度特性,建立了液压成型及轴向载荷下双金属机械复合管力学模型,对比了梯形加载、递增式加载与脉动加载液压成型工艺对复合管界面紧密度的影响,探究了轴向载荷下成型压力与结构参数对复合管界面紧密度的影响规律.结果表明,脉动加载液压成型工艺与梯形加载、递增式加载加工工艺相比,管间残余接触压力提升45%,可以更好地保证双金属复合管成型的稳定性;提高成型后的残余接触压力,有助于增强复合管抗载能力;外基管壁厚对复合管承载力的影响最大;内衬管单独承受拉伸载荷时界面分离现象最明显,增加内衬管壁厚能延缓界面分离.
Study on interface tightness of bimetal mechanical clad pipe under axial loading
In order to study interface tightness characteristics of bimetal clad pipes widely used in the fields such as oil and gas gathering transportation,and ocean engineering,a mechanical model of bimetallic mechanical clad pipes under hydraulic forming and axial loading was established.The influences of trapezoidal loading,incremental loading and pulsating loading hydraulic forming process on the interfacial tightness of clad pipes were compared.The influences of forming pressure and structural parameters on the interfacial tightness of clad pipes under axial loading were investigated.The results show that compared with trapezoidal loading and incremental loading processes,the pulsating loading hydraulic forming process increases the contact pressure between pipes by 45%,which can better ensure the stability of bimetallic composite pipe forming.Increasing the residual contact pressure after forming is helpful to enhancing load resistance of the clad pipes.The wall thickness of the outer pipe has the greatest impact on the bearing capacity of the clad pipe;The interface separation phenomenon is most obvious when the inner liner pipe is subjected to tensile load alone,and increasing the wall thickness of the liner pipe can delay the interface separation.

bimetallic clad pipetightnesshydraulic formingaxial loadingbearing capacity

张旭伟、胡特、张杰

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西南石油大学 机电工程学院,成都 610500

石油天然气装备技术四川省科技资源共享服务平台,成都 610500

石油天然气装备教育部重点实验室,成都 610500

双金属复合管 紧密度 液压成型 轴向载荷 承载力

国家自然科学基金项目

52104223

2024

压力容器
中国机械工程学会压力容器分会

压力容器

CSTPCD北大核心
影响因子:1.384
ISSN:1001-4837
年,卷(期):2024.41(1)
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