风驱雨荷载作用下鞍形膜结构动力响应及可靠度研究

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (11) : 295-303.

论文

盘荣杰1，刘长江1，刘坚1，郑周练2，姜苏3，孙源君1，黄伟彬1

作者信息 +

Dynamic response and reliability analysis of saddle membrane structures under wind-driven rain load

PAN Rongjie1, LIU Changjiang1, LIU Jian1, ZHENG Zhoulian2, JIANG Su3,SUN Yuanjun1, HUANG Weibin1

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文章历史 +

摘要

通过有限元数值模拟和风洞试验对鞍形膜结构在风驱雨荷载作用下的动力响应及其结构可靠度进行研究。首先，采用Workbench软件中的Mechanical APDL模块与Fluent模块建立鞍形膜结构在风驱雨荷载作用下的模型，将该模型导入ANSYS AUTODYN中求解得到动力响应曲线。然后基于气弹相似理论制作了试验模型，并对试验模型进行风驱雨动力加载试验，从而得到其膜面不同特征点在不同工况下的动力响应数据。通过蒙特卡洛法对数值模拟和试验的动力响应数据进行求解，得到鞍形膜结构的可靠指标。此外，讨论了风雨荷载组合、预张力和矢跨比对鞍形膜结构动力响应与可靠度的影响。最后，将试验与数值模拟进行对比分析，数值模拟结果与试验结果较为吻合。研究发现：风驱雨荷载会使膜结构产生显著的非线性振动，通过增大鞍形膜结构的预张力和矢跨比可有效减小振动响应；在不同参数之间，矢跨比对膜结构可靠度的影响更为显著。论文的研究方法和结果可以为膜结构非线性动力响应研究和基于可靠度理论的膜结构设计提供参考。

Abstract

The dynamic response and structural reliability of saddle membrane structure under wind-driven rain load are studied by finite element numerical simulation and wind tunnel test. First, the Mechanical APDL module and the Fluent module of the Workbench software are applied to establish the model of saddle membrane structure excited by the wind-driven rain load, which imported into ANSYS AUTODYN to obtain the dynamic response curves. Then, the experimental models are made based on the aeroelastic similarity theory. The dynamic loading tests of the wind-driven rain are carried out on the test models, and the dynamic response data of different feature points on the test models with different working conditions are obtained. Further, the reliability index of the membrane structure is obtained using the Monte Carlo method to solve the dynamic response data of numerical simulation and experiment. In addition, the effects of the combinations of wind and rain load, pretension force and rise-span ratio on dynamic response and reliability of saddle membrane structures are discussed. Finally, A comparison analysis between the experiment and the numerical simulation is carried out, and the results of numerical simulation agree with the experimental results. The research findings of this paper are as follows: the remarkable nonlinear vibration of membrane structure will be induced by wind-driven rain load, which will be decreased by increasing the pretension force and rise-span ratio; the rise-span ratio among different parameters affects reliability of membrane structure most. The research methods and results in this paper can provide a reference for the nonlinear dynamic response study of membrane structures and the design of membrane structures based on the reliability theory.

导出引用

盘荣杰1，刘长江1，刘坚1，郑周练2，姜苏3，孙源君1，黄伟彬1. 风驱雨荷载作用下鞍形膜结构动力响应及可靠度研究[J]. 振动与冲击, 2023, 42(11): 295-303

PAN Rongjie1, LIU Changjiang1, LIU Jian1, ZHENG Zhoulian2, JIANG Su3,SUN Yuanjun1, HUANG Weibin1. Dynamic response and reliability analysis of saddle membrane structures under wind-driven rain load[J]. Journal of Vibration and Shock, 2023, 42(11): 295-303

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