雙向張弦梁索網(wǎng)形狀優(yōu)化后的零狀態(tài)找形研究
吳 捷1，呂志濤2，舒贛平2
- 摘 要
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(1 蘇州大學(xué) 金螳螂建筑與城市環(huán)境學(xué)院， 蘇州 215000； 2 東南大學(xué) 土木工程學(xué)院， 南京 210096）[摘要]雙向張弦梁結(jié)構(gòu)的索網(wǎng)形狀可以由基于一個(gè)平衡荷載值的曲面平衡方程確定，本文由此提出了“平衡荷載態(tài)”的概念。接著以ANSYS軟件為平臺(tái)，運(yùn)用APDL參數(shù)化設(shè)計(jì)語(yǔ)言編寫(xiě)出參數(shù)化用戶程序，利用非線性有限元方法，基于改進(jìn)的逆迭代法，創(chuàng)建了包含雙向張弦梁結(jié)構(gòu)索網(wǎng)形狀優(yōu)化和結(jié)構(gòu)找形的整體設(shè)計(jì)應(yīng)用程序，實(shí)現(xiàn)了雙向張弦梁結(jié)構(gòu)零狀態(tài)幾何找形和初始預(yù)應(yīng)力找形，并通過(guò)算例展現(xiàn)了該優(yōu)化設(shè)計(jì)程序的高效和便捷。[關(guān)鍵詞] 雙向張弦梁;平衡荷載態(tài);找形;改進(jìn)的逆迭代中圖分類號(hào)：TU311 文獻(xiàn)標(biāo)志碼：A 文章編號(hào)：1002-848X(2013)S1-0356-06作者簡(jiǎn)介：吳捷，博士，Email: jwu@suda.edu.cn。Study on Zero-stress State Form-finding After Shape Optimizing of Bidirectional Beam String Structure Cable NetWu Jie1, Lv Zhitao2, Shu Ganping2(1 Gold Mantis School of Architecture and Urban Environment, Soochow University, Suzhou 215000, China; 2 Civil Engineer College, Southeast University, Nanjing 210096, China)Abstract: Cable net shape of bidirectional beam string structure can be determined by the surface equilibrium equation based on a “equilibrium load value”, so a “equilibrium pad state” is put forward. Then taking ANSYS soft as a platform, using the APDL parametric design language, taking advantage of nonlinear finite element method, based on the improved inverse iteration method, the geometrical structure and initial stress form-finding on zero-stress state of bidirectional beam string structure are realized. Finally, the efficient and convenient for the optimization design program is shown by an example.Key word: bidirectional beam string structure; equilibrium load state; form-finding; improved inverse iteration method
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