Secondly , the effort is made to develope new type of transition element for multi - scale fatigue damage simulaton of long - span structures for the transition between elements for the hot spot stress analysis and the structural element . the linear and piecewise linear interplotion function for displacement interplotion are used for the transition element formulation according to the displacement compatibility requirement between element interfaces 在綜合已有的構造過渡單元模型關于位移插值形式的基礎上,通過采用分段線性位移插值模式和線性位移插值方式,并在位移模式中引入非協(xié)調(diào)位移模式,強迫構造單元通過分片試驗,構造了一種用于疏密網(wǎng)格單元連接過渡單元。
This paper combine the properties of railway bridge to establish the model of vehicle and three - dimension finite model of wan zhou yangtze river bridge individually , then according to the basic hypothesis and through the relations of geometry displacement compatibility and force and adopting the mode superposition to establish the coupling model of vehicles and bridge 本文結合鐵路橋梁的特點,分別建立了車輛模型和萬州長江大橋的三維有限元模型,根據(jù)橋梁結構的基本假設,采用模態(tài)綜合法,通過輪對與輪軌之間的幾何相容關系和力的關系建立了車橋耦合振動模型。