本文選題：顫振　切入點(diǎn)：流固耦合　出處：《四川大學(xué)學(xué)報(bào)(工程科學(xué)版)》2014年05期 　論文類型：期刊論文

【摘要】：為有效分析風(fēng)-橋梁的相互作用和研究橋梁的顫振穩(wěn)定性問(wèn)題,發(fā)展了一種顯式求解流固耦合問(wèn)題的LBM數(shù)值模擬方法。將傳統(tǒng)大渦模擬的亞格子渦黏性模型——?jiǎng)討B(tài)Smagorinsky模型(dynamic Smagorinsky model,DSM)引入多松弛時(shí)間格式的格子玻爾茲曼方法(multiple relaxation time-lattice Boltzmann method,MRT-LBM)中,構(gòu)造了一種顯式運(yùn)算的大渦模擬方法——MRT-LBM-DSM。采用MRT-LBM-DSM作為流場(chǎng)求解器;將結(jié)構(gòu)視為彈性支撐于流場(chǎng)中的剛體,其運(yùn)動(dòng)方程采用Runge-Kutta法求解;利用格子玻爾茲曼方法(lattice Boltzmann method,LBM)的移動(dòng)邊界技術(shù)更新流固耦合面的位置,實(shí)現(xiàn)了流固耦合問(wèn)題的松耦合分區(qū)顯式求解�；谔岢龅腖BM流固耦合算法,編制計(jì)算程序?qū)reat Belt東橋的顫振穩(wěn)定性進(jìn)行分析。研究表明,由LBM流固耦合算法計(jì)算得到的Great Belt東橋顫振臨界風(fēng)速與試驗(yàn)和其他數(shù)值結(jié)論吻合良好,初步說(shuō)明LBM流固耦合算法可以較為準(zhǔn)確地預(yù)測(cè)顫振現(xiàn)象的發(fā)生。
[Abstract]:In order to effectively analyze the wind-bridge interaction and study the flutter stability of the bridge, In this paper, an explicit LBM numerical simulation method for fluid-solid coupling problems is developed. The sublattice vorticity viscosity model-dynamic Smagorinsky model is introduced into multiple relaxation time-lattice Boltzmann method MRT-LBMs with multiple relaxation time schemes. A large eddy simulation method for explicit computation, MRT-LBM-DSM, is constructed. MRT-LBM-DSM is used as the flow field solver, the structure is regarded as a rigid body supported by elasticity in the flow field, and the equation of motion is solved by Runge-Kutta method. The lattice Boltzmann method is used to update the position of fluid-solid coupling surface by using the moving boundary technique of lattice Boltzmann method. The loose-coupling partition explicit solution of fluid-structure coupling problem is realized. Based on the proposed LBM fluid-structure coupling algorithm, The flutter stability of Great Belt East Bridge is analyzed by computer program. The results show that the critical flutter velocity of Great Belt East Bridge calculated by LBM fluid-solid coupling algorithm is in good agreement with the experimental and other numerical results. It is shown that LBM fluid-solid coupling algorithm can accurately predict flutter phenomenon.
【作者單位】： 哈爾濱工業(yè)大學(xué)土木工程學(xué)院;Faculty
【基金】：國(guó)家國(guó)際科技合作資助項(xiàng)目(2011DFA21460) 國(guó)家高技術(shù)研究發(fā)展計(jì)劃(“863計(jì)劃”)資助項(xiàng)目(2008AA11Z104)
【分類號(hào)】：U441.3

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