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1)  large cylindrical structure
大圆筒结构
1.
Wave pressure response of large cylindrical structures in seabed-wave-structure coupling system;
结构—波浪—海床耦合系统中大圆筒结构的波压力响应
2.
By conducting model tests of the large cylindrical wharf structures in varying ratios of depth to height and diameter to height, dynamic characteristics of large cylindrical structures, such as frequency, mode of vibration and dynamic magnification factor are analyzed emphatically in this paper.
根据试验结果,提出合理的振型、基频建议公式和加速度分布系数建议图形及大圆筒结构适用范围。
3.
In order to investigate the mechanism of instability and failure of the deeply embedded large cylindrical structure under random waves, wave flume experiments with different wave conditions were carried out and the corresponding dynamic earth pressures on the structure were measured.
为探究随机波作用下沉入式大圆筒结构的失稳破坏机理 ,文章进行了不同波浪条件下的随机波水槽实验并测取了结构表面的动土压力时程 ,通过在时域和频域的综合分析并结合结构的实际失稳状态 ,文章对沉入式大圆筒结构的失稳破坏机理进行了探索和阐释。
2)  large-diameter cylindrical structure
大圆筒结构
1.
Analyses of bearing capacity for deeply-buried large-diameter cylindrical structure on soft clay considering cyclic-softening effect;
考虑循环软化效应的软基上深埋大圆筒结构承载力分析
2.
Based on simplified form of general Biot′s consolidation theory neglecting inertia effect of soil skeleton and pore fluid,utilizing the improved Cam-clay dynamic constitutive model to simulate the accumulation effect of deformation and extra porepressure in soft clay,the elasto-plastic effective stress finite element analysis is conducted for large-diameter cylindrical structure in soft ground.
基于忽略土骨架和孔隙水惯性效应的广义Biot固结理论的简化形式,采用前人提出的改进剑桥弹塑性动力本构模型以模拟软黏土在循环荷载作用下的变形、超静孔隙水压力累积效应,对于循环波压力作用下软土地基与大圆筒结构物耦合系统进行了弹塑性有效应力有限元分析,探讨了不同波高条件下大圆筒结构的不同变形模式以及失稳机理。
3.
To evaluate the stability of the large-diameter cylindrical structure in soft ground under wave loading,considering the cyclic softening effect of soft clay induced by wave loading,a nonlinear elasto-plastic constitutive model based on the concept of cyclic shear strength of clay is proposed and numerically implemented in the FEM software ABAQUS.
为了评价深厚软土地基上大圆筒结构在波浪荷载作用下的稳定性,考虑波浪可能导致的软黏土地基发生强度和刚度弱化的循环软化效应,将Andersen等建议的软黏土循环强度概念与不排水条件下Duncan-Chang非线性应力应变关系相结合,建议了非线性弹塑性-循环强度模型,并在ABAQUS软件中予以数值实施。
3)  large cylinder structure
大型圆筒结构
1.
In the light of a failure project, the stability calculation methods for large cylinder structures in coastal soft clay foundation are compared, and the determination of design values of soft clay in the wave action and effects of foundation scour on the stability of large cylinder structures are discussed.
提出了反复荷载作用下软土的动力特性、水流作用下结构周围泥面的冲刷演变规律以及波浪作用下大型圆筒结构与软土的动力相互作用等,这都是软土地基条件下大型圆筒海岸结构工程应用亟待解决的关键问题。
4)  Large-diameter Cylinder Structure
大直径圆筒结构
1.
Study on Soil Pressure of Large-diameter Cylinder Structure;
大直径圆筒结构土压力研究
5)  cylindrical structure
圆筒结构
1.
The adjustment mechanism of frictional resistance between soil and cylindrical walls during the overturning of a cylindrical structure was analyzed via model testing Mathematical expressions of the vertical stress between soil and cylindrical walls are established on the basis of the test data and the displacement of cylindrical structures is calculated via the established equations.
采用模型试验分析了沉入式圆筒结构在倾覆过程中土与筒壁间摩阻力调整机理 ,并基于试验资料建立了土与筒壁间竖向应力的数学表达式 ,同时利用已建立的有关公式求解圆筒结构的变位。
2.
The inner earth pressure of buried cylindrical structure was measured by model test.
采用模型试验实测圆筒结构筒内土压力 ,并对圆筒在倾覆过程中筒内土压力的变化规律进行探讨。
3.
The internal force values of buried cylindrical structure were measured by model tests.
采用模型试验对沉入式圆筒结构内力进行了实测 ,分析了不同荷载作用下纵向和环向弯矩及其最大值位置的变化规律。
6)  large diameter cylinder structure
大圆筒防波堤结构
补充资料:抽芯成型高差大的滑块多级锁紧结构
在压铸模设计中, 常常会遇到同一抽芯而各成型高度相差较大的零件, 如果采用斜拉杆或弯销抽芯, 习惯上采取的措施是增加滑块的高度,以满足滑块的退位空间,其结果是滑块的重量增加,模框的强度降低。

图1 是汽车油泵调速器前壳压铸件示意图, Ⅰ- Ⅰ分型面需用抽芯才能完成脱模,其最低抽芯高度Hmin 为17mm, 最大抽芯高度Hmax为45mm, 为了保证滑块有足够的退位空间而不发生自锁, 滑块的高度必须大于或等于45mm。为避免抽芯距离过大造成滑块体积增加, 在设计中采用了局部增高多级锁紧结构,如图2 所示。P 是高于17mm低于45mm的面,N是高于45mm的面,M面是与N面同高且保证N 面受力平衡的辅助结构。α为抽芯角,β1 、β2 为锁紧角,β1 、β2 不仅具有锁紧作用,而且在开模抽芯时还具有让位的作用,所以β1 、β2 必须大于α, 而且β2 应大于β1 , 否则开模时, 滑块会出现自锁。锁紧角β2 也可以等于β1 , 但由于制造时有误差, 如果误差大, 则β1和β2 形成的锁紧面会出现干涉。在压铸件调速器前壳模具设计中, α取23°, β1 取26°, β2取30°,实现了安全生产。




总之, 对于那些抽芯高度相差大的滑块,采用多级锁紧结构,对减小滑块的重量、延长模具寿命,节约模具材料具有重要的作用。

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