Riks Method的案例
ANSYS中弧長(zhǎng)法的原理
關(guān)于弧長(zhǎng)法的原理，推薦參考《非線(xiàn)性分析弧長(zhǎng)法的讀書(shū)報(bào)告》、陸新征老師學(xué)生時(shí)代的作業(yè)：《基于預(yù)處理技術(shù)和弧長(zhǎng)法的非線(xiàn)性方程通用求解子程序總結(jié)報(bào)告 》，以及Yusd的博文《弧長(zhǎng)法（Riks Method）的基本原理》。喜歡編程的話(huà)，還可以參考他的另一篇文章《弧長(zhǎng)法(Riks method)通用求解程序》。英文資料可閱讀蘇黎世聯(lián)邦理工學(xué)院結(jié)構(gòu)工程研究所Prof. Dr. Eleni Chatzi的講稿：《The Finite Element Method for the Analysis of Non-Linear and Dynamic Systems》
在這里只強(qiáng)調(diào)一下弧長(zhǎng)法的一個(gè)獨(dú)特的優(yōu)勢(shì)：
見(jiàn)下圖，當(dāng)微小荷載增量可以引起顯著的位移突躍，則成為荷載控制的急速通過(guò)(Snap though)；當(dāng)微小位移增量可以產(chǎn)生顯著的荷載突躍，則成為位移控制的急速返回(snap back)——這種復(fù)雜的加載路徑，單純荷載或位移控制已經(jīng)難以奏效，而弧長(zhǎng)法則可輕松處理此類(lèi)問(wèn)題。
轉(zhuǎn)自公眾號(hào)——ANSYS學(xué)習(xí)與應(yīng)用
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展開(kāi) Finite Element Analysis and Design of Steel Bridge ￥5
Finite Element Analysis of Steel and Steel-Concrete
Composite Bridges 469
5.1 General remarks 469
5.2 Choice of finite element types for steel and steel-concrete composite
bridges 470
5.3 Choice of finite element mesh for the bridges and bridge components 496
5.4 Material modeling of the bridge components 501
5.5 Linear and nonlinear analyses of the bridges and bridge components 516
5.6 Riks method 527
5.7 Modeling of initial imperfections and residual stresses 540
5.8 Modeling of shear connection for steel-concrete composite bridges 543
5.9 Application of loads and boundary conditions on the bridges 551
References 553
6.
展開(kāi) abaqus分析熱軋橢圓空心型鋼的抗壓強(qiáng)度（一）
The modified Riks method [9] was employed to solve the geometrically and materially non-linear stub column models, which enabled the unloading behaviour to be traced. The numerical failure mode of EHS 150 × 75 × 4-SC2 is illustrated in Fig. 16 and compared with the corresponding deformed test specimen. Results of the numerical simulations are tabulated in Table 4, in which, the ratios between the FE ultimate load and the experimental ultimate load are shown and compared for different imperfection levels.</p><p>Replication of test results has been found to be satisfactory with the numerical models able to successfully capture the observed stiffness, ultimate load, general load–end shortening response and failure patterns.
展開(kāi) Riks Method的相關(guān)專(zhuān)題、標(biāo)簽、搜索
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