• ADINA助力郑州飞机装备有限责任公司开展多路阀阀芯流固热耦合研究

  多路阀可以同时控制多个液压执行机构工作,实现对压力和流量的双重控制，被广泛应用于工程机械中。多路阀的性能对工程机械整体性能有重要影响，是工程机械的核心元件。长期以来由于我国在多路阀自主开发方面起步晚，基础薄弱,研究多路阀相关技术问题有重要的现实意义。

  2024-05-30 admin

• Rocscience Slide3和RS2：露天矿边坡破坏反分析的首选工具

  Rocscience Slide3和RS2以其可靠和强大的极限平衡和有限元边坡稳定分析而闻名。因此，它们成为J.M.的首选工具也就不足为奇了。卡布亚等人在一篇论文中提出了一个数值反分析的边坡破坏发生在露天矿在加拿大。

  2025-07-18 iGeo

• 反分析-Rocscience Slide2软件教程

  本教程演示了 Slide2 中的反分析（Back Analysis）功能。该功能可以确定在给定边坡中，为实现期望的安全系数所需的支护力。在开始本教程之前，建议先完成教程 07 - 支护教程，以熟悉本教程中使用的支护功能。

  2025-07-18 iGeo

• Mechanical behavior of segment rebar of shield tunnel in construction stage

  In this paper, a 3D finite element (FE) program ADINA was applied to analyzing a tunnel with 9 segment rings. Theloads acting on these segment rings included the squeezing action of tail brush of shield machine under attitude deflection, thejacking forces, the grouting pressure and the soil pressure. The analyses focused on the rebar stress in two statuses: (1) normalconstruction status without shield machine squeezing; (2) squeezing action induced by shield machine under attitude deflection. The analyses indicated that the rebar stress was evidently affected by the construction loads. In different construction status, therebar stress ranges from −80 MPa to 50 MPa, and the rebar is in elastic status. Even some cracks appear on segments, the stress ofsegment rebar is still at a low level. It is helpful to incorporate a certain quantity of steel fiber to improve the anti-crack and shockresistance performance.

  2024-12-12 iGeo

• New concepts for ocean nuclear power plants

  We present recently developed new concepts for ocean nuclear power plants (ONPPs)using gravity-based structures (GBS) and tension leg platforms (TLP) [1-3]. For GBStype ONPPs, the large nuclear reactor (APR 1400) and the small and medium nuclearreactor (SMART) are mounted, respectively. For a TLP-type ONPP, SMART ismounted. We introduce basic design concepts including new general arrangements(GAs) obtained through a modularization method. In order to evaluate their safety andstability, a fully coupled seismic analysis considering GBS-seawater-soil interaction is performed for GBS-type ONPP. Hydrostatic and dynamic analyses are conducted forthe TLP-type ONPP. We believe that ONPPs are the next generation nuclear powerplants with enhanced safety useful for mankind.

  2024-12-12 iGeo

• 基于强度折减法的库岸滑坡三维有限元分析

  The genetic mechanism and evolvement process of the reservoir bank landslide were discussed detailedly based onengineering exploration and analyzing environmental geological conditions. And some main factors effecting stability of the landslidewere analyzed emphatically. Through building a 3D FEM model of landslide, the stable situations of the landslide under varioussituations were considered based on the strength reduction method. The result shows that the landslide is steady under the naturalsituation. The front edge of the landslide will be drowned out when the reservoir retains water normally; the safety factor reduces andcan’t meet the requirements of norms. The landslide tends to be more dangerous under rainfall infiltration and rapid drawdown of thereservoir water level. And the landslide will be instable when water storage situation and earthquake situation were considered at thesame time. According to the preceding analysis, the treatment measures of cutting slope and reducing load were presented. Thelandslide is steady under various conditions after being controlled. The relevant conclusions and methods proposed take a good effectin landslide treatment.

  2024-12-04 iGeo

• Slide3和RS2：露天矿边坡破坏反分析的首选工具

  Rocscience Slide3和RS2以其可靠和强大的极限平衡和有限元边坡稳定分析而闻名。因此，它们成为J.M.的首选工具也就不足为奇了。卡布亚等人在一篇论文中提出了一个数值反分析的边坡破坏发生在露天矿在加拿大。

  2024-08-06 iGeo

• GeoStudio 强度折减稳定性

  强度折减稳定性是一种通过在弹塑性有限元分析中逐步削弱土体强度直至边坡破坏来获得安全系数的程序。安全系数被认为是使土体强度降低到达到破坏所需的系数（Dawson 等人，1999 年；Griffiths和Lane，1999 年）。此示例说明了如何使用 SIGMA/W 执行强度折减稳定性分析。此外，结果将在称为基于应力的稳定性分析的替代程序的背景下进行讨论。

  2024-05-30 admin