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盧旦

（上?，F(xiàn)代建筑設(shè)計(jì)（集團(tuán)）有限公司，上海 200041）

 

［摘要］采用松耦合方法對(duì)索膜結(jié)構(gòu)的風(fēng)致振動(dòng)問(wèn)題進(jìn)行研究，提出了基于三角形重心坐標(biāo)系的網(wǎng)格變形插值新方法，并從計(jì)算精度和工程適用性的角度對(duì)一致網(wǎng)格和非一致網(wǎng)格進(jìn)行了比較，提出了有效提高計(jì)算效率的實(shí)用方法。在上述研究的基礎(chǔ)上，對(duì)上海世博軸索膜結(jié)構(gòu)的風(fēng)致流固耦合問(wèn)題進(jìn)行了數(shù)值分析，計(jì)算結(jié)果表明：流固耦合作用將明顯改變索膜結(jié)構(gòu)的動(dòng)力特性，在索膜結(jié)構(gòu)的風(fēng)振計(jì)算中不容忽視。流固耦合在世博軸索膜結(jié)構(gòu)的風(fēng)振響應(yīng)中主要表現(xiàn)在靜態(tài)耦合作用的增大和瞬態(tài)耦合的削弱，且前者的作用超過(guò)后者。流固耦合基本不影響大尺度渦對(duì)結(jié)構(gòu)的作用。

［關(guān)鍵詞］索膜結(jié)構(gòu)；流固耦合；非一致網(wǎng)格；風(fēng)振系數(shù)

中圖分類號(hào)：TU352.2        文獻(xiàn)標(biāo)識(shí)碼：A        文章編號(hào)：1002-848X(2013)04-0083-05

 

Lu Dan

(Shanghai Xian Dai Architectural Design (Group) Co., Ltd., Shanghai 200041, China)

 

Abstract: The wind-induced vibration was researched by the weak coupling algorithm. A new method on mesh deformation interpolation was proposed based on the barycentric coordinate system of triangle. Comparations were carried out between consistent grids and inconsistent ones in terms of accuracy and project adaptation. A practical method which can improve the computational efficiency effectively was proposed. A study on computation of fluid-structure interaction（FSI）on membrane structure of EXPO Axis was carried out. It is shown that the FSI which can not be neglected in windinduced vibration calculation will significantly change the dynamic characteristics of membrane structure. FSI mainly affects on three response components: mean response, background response and resonant response. The first component increases the structural response, while the third decreases the response. FSI does not influence the large-scale vortex around the structure.

Keywords: cable-membrane structure; fluid-structure interaction; inconsistent grid; wind load factor

*上海市科技人才計(jì)劃項(xiàng)目（10QB1403500）。

作者簡(jiǎn)介：盧旦，博士，高級(jí)工程師，Email: dan_lu@xd-ad.com.cn。

 

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