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基于ANSYS软件平台的弧形闸门结构优化设计(朱耿军)

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#a L2^'S3w/~X$q:Iz0基于ANSYS软件平台弧形闸门结构优化设计水利论文I"h"v SSAC

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【作者】朱耿军 【导师】严根华
4YT{J.mi5JP!t0【作者基本信息】南京水利科学研究院,水力学及河流动力学,2005年,硕士

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【中文摘要】 水工弧形闸门因其轻型的结构特征、优越的运行特点以及简便的操作方式被广泛地应用于泄水建筑物中。但是在运行过程中,由于水流和门体的相互作用,引起的流激振动现象也普遍存在,当这个振动量级达到一定程度时往往使闸门结构产生破坏,造成极大损失。近年来随着高坝建设的不断发展,弧形闸门门体结构设计也趋于复杂,运行过程的动态特性也变得复杂多样。为避免闸门的共振破坏,对弧形闸门结构进行动态特性分析以及动态优化已成为一个重要研究课题。 本文提出通过调节闸门支臂惯性矩的优化方法以提高结构整体的抗弯刚度,进而提高闸门低阶振型的振动频率,使其避开水动力荷载高能区,达到结构抗振优化设计的目的。 使用大型有限元分析软件ANSYS为计算平台,以实际工程为依托,对弧形闸门结构优化方案分别进行了模态分析、谐响应分析和瞬态动力学分析,验证了增强闸门支臂惯性矩以提高闸门低频这一优化方案的可行性。并对新的优化设计方向进行了探索,提出闸门面板与支臂惯性矩同步调节的新方案。 利用ANSYS优化设计模块,对水工弧形闸门进行了质量优化设计。并提出了使用ANSYS优化模块进行质量优化设计时应当注意的问题。

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}5Q+]4X7lc*l0@-u0【英文摘要】 Radial gates, due to their characters of the light structure, excellent running and easy operation, are widely used on discharging buildings. During it's operation, for the effect between the flow and the gate each other, the flow-induced vibration appeared ubiquitously. When the vibration amplitude of gate reaches a certain degree, the gate will be destroyed and a great loss will occur subsequently. Nearly, with the development of high dam buildings, the radial gate structures became more and more complex, and the dynamic characteristics became more and more complicated. For preventing form the destroying of resonance, the dynamic characteristics analysis and optimization of radial gates have been become an important research projects.In this thesis, the optimization method of adjusting the gate legs' inertia moment was given. Through this method, the flexural rigidity and the lower steps vibration frequencies of the gate structure can be improved and the gates will escape from the re...更多sonance with flow, finally, the structure optimization has been realized.With the calculating tool of the powerful FEM software ANSYS, and combined with the project example, the structure's modal analysis, harmonic response analysis and transient dynamical analysis of the radial gate were calculated and contrasted, which shows that the optimization method was feasible. Additionally the new optimizing method of adjusting the skin plate thickness and legs' inertia moment was explored.The mass optimization of the radial gate was studied with the optimization design module of the software ANSYS, and the problem which should be pay attention to during the designing used this module was be pointed out in this thesis.  还原水利论文"_R-d(\fk F1w

e]-^lv#MB+Xv0【中文关键词】 弧形闸门; 优化设计; 自振特性; 模态分析; ANSYS; 谐响应分析; 瞬态动力学分析; 质量优化
)n7Ko#a9l(@|_0【英文关键词】 radial gate; optimization design; vibration characteristics; modal analysis; ANSYS; harmonic response analysis; transient dynamical analysis; mass optimization
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TAG: 平台 朱耿军 ANSYS 弧形闸门 软件
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