柱壳有限条元法在预应力U型薄壳渡槽稳定性分析中的应用
|
摘要
本文采用半解析有限元法建立了用于U型薄壳渡槽稳定性分析的柱壳有限条元模型,推导出了稳定性问题的特征方程,确定了渡槽结构失稳的临界应力,编制了相应的计算程序。通过与简支的单向受压板和四边简支单向纯弯板的稳定性问题的理论解的对比,验证了模型的合理性和精确性。计算结果说明,以结构的最大压应力小于失稳临界应力为准则,可对预应力U型薄壳渡槽稳定性进行判断。
The semi-analytical finite element method is adopted to establish a finite element model for stability analysis of prestressed U-shaped thin shell aqueduct.The characteristic equation of the stability analysis is deduced and the corresponding computational program is developed.The reasonability and accuracy of the proposed model are verified by the theoretical stability analysis results of a simple supported plate under the action of uni-axial pressure and a simple supported plate bending in one direction.The critical stress during the failure of construction is deduced.The criterion of the aqueduct failure may define as whether the maximum stress in the structure is exceeded the critical stress or not.
The semi-analytical finite element method is adopted to establish a finite element model for stability analysis of prestressed U-shaped thin shell aqueduct.The characteristic equation of the stability analysis is deduced and the corresponding computational program is developed.The reasonability and accuracy of the proposed model are verified by the theoretical stability analysis results of a simple supported plate under the action of uni-axial pressure and a simple supported plate bending in one direction.The critical stress during the failure of construction is deduced.The criterion of the aqueduct failure may define as whether the maximum stress in the structure is exceeded the critical stress or not.
引文
[1]张伯艳,刘云贺,陈厚群.U形渡槽结构静动力分析[J].水利学报,2004,(1):74-77.
[2]吴轶,莫海鸿,杨春.排架-渡槽-水三维耦合体系地震响应分析[J].水利学报,2005,36(3):280-285.
[3]刘云贺,陈厚群.大型渡槽铅销橡胶支座减震机理的数值模拟[J].水利学报,2003,(12):98-103.
[4]白新理,刘桂荣,王.改进遗传算法在渡槽优化设计中的应用[J].水利水运工程学报,2005,(2):59-62.
[5]符志远,段国学,黄薇,等.大型“U”型薄壳预应力渡槽仿真结构试验[J].人民长江,2004,(8):49-58.
[6]张多新,王清云,杨开云,等.U型薄壳渡槽施工及运营阶段受力仿真分析[J].水利水电技术,2005,(7):96-102.
[7]王清云,张多新,白新理,等.预应力U型薄壳渡槽结构静动力分析[J].南水北调与水利科技,2005,(3):59-62.
[8]刘东常,刘宪亮,籍东,等.U型薄壳渡槽整体稳定性问题的研究[J].黄河规划设计,1996,(4):39-43.
[9]张建华,刘东常,宋力.矩形薄壁梁式渡槽稳定性分析中的半解析有限板条元法[J].南水北调与水利科技,2004,(6):52-54.
[10]刘东常,刘琰玲,孟闻远,等.埋藏式压力钢管受外压失稳屈曲分析的半解析有限元法[J].水力发电学报,2004,(3):84-87.
[11]刘琰玲,何彦舫,刘东常.圆柱壳结构稳定性分析的半解析柱壳有限条元法[J].华北水利水电学院学报,2003,(1):20-23.
[12]张多新,刘东常,贾志营,等.预应力U型薄壳渡槽稳定性的分析计算[J].隧道建设,2003,(6):10-11.
[2]吴轶,莫海鸿,杨春.排架-渡槽-水三维耦合体系地震响应分析[J].水利学报,2005,36(3):280-285.
[3]刘云贺,陈厚群.大型渡槽铅销橡胶支座减震机理的数值模拟[J].水利学报,2003,(12):98-103.
[4]白新理,刘桂荣,王.改进遗传算法在渡槽优化设计中的应用[J].水利水运工程学报,2005,(2):59-62.
[5]符志远,段国学,黄薇,等.大型“U”型薄壳预应力渡槽仿真结构试验[J].人民长江,2004,(8):49-58.
[6]张多新,王清云,杨开云,等.U型薄壳渡槽施工及运营阶段受力仿真分析[J].水利水电技术,2005,(7):96-102.
[7]王清云,张多新,白新理,等.预应力U型薄壳渡槽结构静动力分析[J].南水北调与水利科技,2005,(3):59-62.
[8]刘东常,刘宪亮,籍东,等.U型薄壳渡槽整体稳定性问题的研究[J].黄河规划设计,1996,(4):39-43.
[9]张建华,刘东常,宋力.矩形薄壁梁式渡槽稳定性分析中的半解析有限板条元法[J].南水北调与水利科技,2004,(6):52-54.
[10]刘东常,刘琰玲,孟闻远,等.埋藏式压力钢管受外压失稳屈曲分析的半解析有限元法[J].水力发电学报,2004,(3):84-87.
[11]刘琰玲,何彦舫,刘东常.圆柱壳结构稳定性分析的半解析柱壳有限条元法[J].华北水利水电学院学报,2003,(1):20-23.
[12]张多新,刘东常,贾志营,等.预应力U型薄壳渡槽稳定性的分析计算[J].隧道建设,2003,(6):10-11.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心