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为了解250 MN钢丝预紧式主缸的应力和变形情况,对其进行了理论计算和有限元模拟。结果显示,主缸筒体不管是在预紧状态还是在工作状态,由于受端部影响,其径向位移、应力是轴向位置的函数,并非沿轴向均匀分布。工作时,载荷边界线处的径向位移为0.895 mm。预紧时,距缸体端面右侧581 mm处轴向应力最大,约103.08 MPa。最大Tresca、Mises应力出现在分界线右侧781 mm的地方,Tresca应力约为332.46 MPa,Mises应力约为301.19 MPa。有限元计算结果和理论计算比较吻合,二者可相互验证。
In order to understand the stress and deformation of 250 MN steel pretensioned master cylinder, theoretical calculation and finite element simulation are carried out. The results show that whether the master cylinder is in the pre-tensioned state or in the working state, the radial displacement and stress of the master cylinder as a function of the axial position are not distributed uniformly in the axial direction due to the influence of the end. At work, the radial displacement at the load boundary is 0.895 mm. When pretensioned, the axial stress is the largest at 581 mm from the right end of the cylinder body, about 103.08 MPa. The maximum Tresca and Mises stresses appear at 781 mm to the right of the demarcation line. The Tresca stress is about 332.46 MPa and the Mises stress is about 301.19 MPa. Finite element calculation results and theoretical calculations are in good agreement, the two can be verified with each other.