共查询到18条相似文献,搜索用时 62 毫秒
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王小平 《锅炉压力容器安全技术》1997,(2):1-5
分析了医用氧舱圆柱壳体上超规范矩形大开孔的几种加强估算,探讨了开孔处结构加强一文所采用的理论估算方法和结构加强型式,经液压试验校核和应变测量结果分析,证明这种型式能保持壳体安全可靠,并且已用于实际工程中。 相似文献
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In this work, we consider the axisymmetric boundary-value problem of thermoplasticity for the laminated shells made of isotropic and orthotropic materials subjected to heating and loading. The equations of the plastic flow theory with isotropic hardening and the R. Hill flow theory are used. A method of successive approximations is developed to solve the problem. The components of stress-strain state of two laminated shells under loading and heating are obtained and represented graphically. 相似文献
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为保证不同工况下重型燃气轮机发电机组的高效、稳定运行,需要对其轴流式压气机性能进行高精度建模分析。本文以某F级重型燃气轮机为研究对象,有效结合实测数据和基元叶栅法理论计算值,采用随机森林方法,建立其压气机高精度特性计算模型,从而分析不同工况下的压气机性能。结果表明:模型计算的总压比和多变效率的平均相对误差分别为-0.13%和0.04%;最大相对误差分别为2.11%和1.90%。现有文献的模型最大相对误差分别为3.1%和4.4%,本文方法得到的最大误差仅分别为其68.06%和43.18%。 相似文献
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本文对两种大开孔补强计算方法适用范围进行了总结对比,并通过分析实际工程算例的方式展示了两种方法在具体工程应用中的异同;最后给出了两种方法的比较结果. 相似文献
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This article focuses on analytical solutions for bifurcation buckling of FGM cylindrical shells under thermal and compressive loads. A new solution methodology is established based on Hamilton's principle. The fundamental problem is subsequently transformed into the solutions of symplectic eigenvalues and eigenvectors, respectively. Then, by applying a unidirectional Galerkin method, imperfection sensitivity of an imperfect FGM cylindrical shell is discussed in detail. The solutions reveal that boundary conditions, volume fraction exponent, FGM properties, and temperature rise distribution significantly influence the buckling behavior. Critical stresses are reduced greatly due to the existence of initial geometric imperfections. 相似文献
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论文以锅炉钢结构常用轴心受力构件—柱、垂直支撑、水平支撑(b类截面)为模型,对中美规范中,轴心受压构件计算(许用应力法)进行分析比较。 相似文献