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中国交叉科学学会第15届学术年会

作者： Qizheng Zhou Deshi Wang Department of Weaponry Engineering Naval University of Engineering

The bifurcations of the nonlinear vibro-acoustic coupling system consisted by a Duffing oscillator and a plate structure are investigated by the incremental harmonic balance（IHB）method and the modal superposition *** Hamilton principle,the nonlinear vibro-acoustic coupling equations of the Duffing oscillator-plate structure system are developed The displacement and the surface pressure of plate are expressed in terms of normal modes based on boundary conditions by the modal superposition *** IHB method and the Floquet theory are employed to derive the solution and the stability of the vibro-acoustic coupling *** on the type of bifurcation,the solution of the coupling equations is constructed,and the IHB method and the Floquet theory are applied to obtain the solution of the coupling equations and the *** repeating the procedure,a series bifurcation points and the solutions are ***,the surface average velocity level and the acoustic radiation power level of the plate are defined based in different period *** results show that there are imaginary parts in the coupling system due to the acoustic pressure,the bifurcations of the Duffing oscillator are delayed,and the stability is *** the first bifurcation,the vibro-acoustic characteristics of the plate are changed.

关键词： vibro-acoustic coupling system plate structure Duffing oscillator bifurcation IHB method

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主动冷却平板型结构件的最高温度及温度分布解析模型

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Acta Mechanica Sinica 2023年第5期39卷 38-47页

作者：胡国豪仲峰泉陈科挺 State Key Laboratory of High Temperature Gas Dynamics Institute of MechanicsChinese Academy of SciencesBeijing100190China School of Engineering Science University of Chinese Academy of SciencesBeijing100049China

主动冷却平板型结构件应用广泛,快速评估其温度性能具有重要意义.本文提出了一种用于预测主动冷却平板型结构件的最高温度和温度分布的解析模型.解析模型有三种输入参数,包括热边界条件、材料特性和几何参数.分别讨论了两种热边界条件... 详细信息

主动冷却平板型结构件应用广泛,快速评估其温度性能具有重要意义.本文提出了一种用于预测主动冷却平板型结构件的最高温度和温度分布的解析模型.解析模型有三种输入参数,包括热边界条件、材料特性和几何参数.分别讨论了两种热边界条件下的求解过程,包括热流密度边界和对流传热边界.根据能量守恒原理,建立了热流密度边界模型(MHF).采用二次函数拟合真实热流密度分布的方法,建立了对流传热边界模型(MCHT).结构件的材料有铝合金和钛合金.结果表明,与数值模型结果相比,该解析模型能够预测最高温度,误差小于4%.该模型能够快速、准确地评估主动冷却平板型结构件的热防护性能.

关键词： plate structure Active cooling Thermal protection Convective heat transfer Analytical model

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Perpendicular intergrowth ZSM-5 plates with shortened 10-MR pores

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Chinese Journal of Catalysis 2020年第7期41卷 1132-1139页

作者： Ensheng Zhan Zhiping Xiong Yan Zhou Mingrun Li Pengfei Wang Weibin Fan Wenjie Shen State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina State Key Laboratory of Coal Conversion Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001ShanxiChina University of Chinese Academy of Sciences Beijing 100049China

ZSM-5 plates with a perpendicular intergrowth structure was synthesized by using a simple amine as the structure directing agent under hydrothermal conditions,in which the mother plate and the perpendicularly standing plates oriented along the(010)and(100)planes of MFI crystals,*** the crystallization process,the mother plate was initially formed on the surface of the amorphous solid gel,while a set of parallel plates perpendicularly grew on its surface,via a homogeneous nucleation *** mother plate and the perpendicular plates had a similar thickness of 100-200 nm and were characterized by considerably shortened straight and zigzag 10 member ring pores,*** unique intergrowth structure greatly facilitated the diffusion of the reactive molecules in HZSM-5 crystals during methanol conversion to hydrocarbons.

关键词： ZSM-5 plate structure Perpendicular Intergrowth Channel length Hierarchical structure Molecule diffusion

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Reconstruction Technology of Flexible structure Shape Based on FBG Sensor Array and Deep Learning Algorithm

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Structural Durability & Health Monitoring 2022年第2期16卷 179-194页

作者： Kelong Huang Jie Yan Lei Zhang Faye Zhang Mingshun Jiang Qingmei Sui Control Science and Engineering Academy Shandong UniversityJinan250012China

A structural displacement field reconstruction method is proposed to aim at the problems of deformation mon-itoring and displacement field reconstruction of flexible plate-like structures in the aerospace *** method combines the deep neural network model of the cross-layer connection structure with the fiber grating sensor *** paper first introduces the principle of strain detection of fiber grating sensor,studies the mapping relationship between strain and displacement,and proposes a strain-displacement conversion model based on an improved neural *** the intelligent structure deformation monitoring system is *** controlling the stepping distance of the motor to produce different deformations of the plate structure,the strain information and real displacement information are obtained based on the high-density fiber grating sensor network and the dial indicator ***,based on the deformation prediction model obtained by training,the displacement field reconstruction of the structure under different deformation states is *** results show that the mean absolute error of the deformation of the measuring points obtained by this method is less than 0.032 *** method is feasible in theory and practice and can be applied to the deformation monitoring of aerospace vehicle structures.

关键词： plate structure visual reconstruction fiber Bragg grating sensor neural networks

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