计算机仿真
計算機倣真
계산궤방진
COMPUTER SIMULATION
2014年
5期
66-71
,共6页
热冲击载荷%热诱发振动%有限元法%位移等效原则%等效温度载荷
熱遲擊載荷%熱誘髮振動%有限元法%位移等效原則%等效溫度載荷
열충격재하%열유발진동%유한원법%위이등효원칙%등효온도재하
Thermal shock load%Thermal induced vibration%Finite element method%Equivalent displacement principle%Equivalent temperature load
空间站在轨运行期间会周期性的受到太阳辐射、地球反照等，在热载荷作用下可能会诱发空间站结构的振动。通过研究热载荷诱发振动的机理，提出了一种计算非耦合热诱发振动的有限元分析方法，以传热学、弹性力学、动力学的基本理论为依据，按照节点位移等效原则计算有限元模型各节点的等效温度载荷，并以载荷作为激励研究结构的振动。根据结构的一阶固有频率，使用不同频率的热冲击载荷验证了热诱发振动分析方法的可行性。通过与经典理论和其他学者的分析结果作对比，验证了上述分析方法的精确性。使用Python前后处理程序可以高效地执行载荷读取、模型加载等操作，可以提高复杂模型的前后处理效率。该热诱发振动分析方法和Python前后处理程序可以高效地完成复杂空间结构的非耦合热诱发振动分析。
空間站在軌運行期間會週期性的受到太暘輻射、地毬反照等，在熱載荷作用下可能會誘髮空間站結構的振動。通過研究熱載荷誘髮振動的機理，提齣瞭一種計算非耦閤熱誘髮振動的有限元分析方法，以傳熱學、彈性力學、動力學的基本理論為依據，按照節點位移等效原則計算有限元模型各節點的等效溫度載荷，併以載荷作為激勵研究結構的振動。根據結構的一階固有頻率，使用不同頻率的熱遲擊載荷驗證瞭熱誘髮振動分析方法的可行性。通過與經典理論和其他學者的分析結果作對比，驗證瞭上述分析方法的精確性。使用Python前後處理程序可以高效地執行載荷讀取、模型加載等操作，可以提高複雜模型的前後處理效率。該熱誘髮振動分析方法和Python前後處理程序可以高效地完成複雜空間結構的非耦閤熱誘髮振動分析。
공간참재궤운행기간회주기성적수도태양복사、지구반조등，재열재하작용하가능회유발공간참결구적진동。통과연구열재하유발진동적궤리，제출료일충계산비우합열유발진동적유한원분석방법，이전열학、탄성역학、동역학적기본이론위의거，안조절점위이등효원칙계산유한원모형각절점적등효온도재하，병이재하작위격려연구결구적진동。근거결구적일계고유빈솔，사용불동빈솔적열충격재하험증료열유발진동분석방법적가행성。통과여경전이론화기타학자적분석결과작대비，험증료상술분석방법적정학성。사용Python전후처리정서가이고효지집행재하독취、모형가재등조작，가이제고복잡모형적전후처리효솔。해열유발진동분석방법화Python전후처리정서가이고효지완성복잡공간결구적비우합열유발진동분석。
Structures of space station maybe vibrate induced by the thermal loads from the sun and the earth dur-ing running on orbit. By studying the theory of thermally induced vibration ( UTIV) , a finite analysis method of un-coupled thermally induced vibration was proposed. Based on the basic theories of heat transfer, elasticity and dynam-ics, equivalent temperature loads of nodes were calculated according to equivalent displacement principle of nodes and used to study the vibration of a structure as excitation loads. Three thermal shock loads with different frequencies were used to test the feasibility of UTIV analysis method considering the first order natural frequency. Comparative studies were carried out to prove the accuracy of this method. Pre- and post-processing Python programs were used to read load data and create loads on finite model, they can also complete pre-and post-process for complex model high effi-ciently. This UTIV method and Python programs can complete UTIV analysis of complex spacial structures high effi-ciently.
