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| 1 | 基于模态参数及BAS-PSO优化算法的软基水闸有限元模型参数修正方法显示文摘正确合理的有限元模型对于软基水闸结构健康监测及性能评估至关重要,但水闸有限元模型参数的不确定性使得建立的水闸有限元模型难以准确地反映水闸结构真实的动力学特性,该文结合模态参数和基于天牛须搜索算法的粒子群(BAS-PSO)优化算法,提出了一种软基水闸有限元模型参数修正方法。选择对水闸模态参数影响较大的弹性模量和密度作为待修正参数,建立反映软基水闸待修正参数和模态参数之间非线性关系的基于遗传算法的支持向量回归(GA-SVR)代理模型;提出基于GA-SVR代理模型计算模态参数与水闸振动模态参数之间相对偏差最小的目标函数,构建软基水闸有限元模型参数修正的最优化数学模型;提出一种BASPSO优化算法来求解最优化数学模型,克服了局部最优和收敛速度慢的问题。通过软基水闸物理模型实例表明,修正的有限元模型计算的模态参数与水闸识别模态参数在数值上比较吻合,该文方法合理可靠且具有良好的可行性,可为软基水闸有限元模型参数修正提供一条新思路。 | 李火坤 王刚 余杰 魏博文 黄伟 黄锦林 | 2021 | 工程力学2021，38，9： | 9 |
| 2 | High-frequency vibration analysis of thin plate based on wavelet-based FEM using B-spline wavelet on interval显示文摘The wavelet finite element existing methods(WFEMs)own higher calculation accuracy and efficiency for structure analysis.Unfortunately,the WFEMs are still limited in low-frequency domain on when type capturing dynamic characteristics plate of thin plate.to This paper this proposes limitation.The the wavelet multi-elements method based and C1 B-spline Kirchhoff are(C1BKP)element break up The validity,numerical stability convergence respectively and investigated systematically in numerical predicting modes study.the corresponding results show The that the calculation accuracy errors numerical rapidly stability are 0.4%very excellent when1000high-order plate natural frequency.maximum Besides,relative method can be for reduced to within the first of thin under simply supported.the is suitable predicting the dynamic characteristics of thin plate under various boundary conditions. | GENG Jia ZHANG XingWu CHEN XueFeng XUE XiaoFeng | 2017 | Science China(Technological Sciences)2017，60，5： | 4 |
| 3 | Failure mechanism of full-size concrete filled steel circle and square tubes under uniaxial compression显示文摘In this paper, the failure mechanisms of full-size concrete filled steel tubes(CFST) under uniaxial compression were investigated with nonlinear finite element method. Existing experimental results were employed to verify the validity of the finite element models of CFST specimens. Then, the numerical analysis was further conducted to study the mechanical behaviors of full-size CFST columns with circular and square cross sections under uniaxial compression. The simulation results indicate that the distribution of the contact pressure between circular steel tube and core concrete is much more uniform than that between square steel tube and concrete, resulting in much higher confinement and more efficient interaction between steel tube and core concrete in circular CFST columns, as well as ultimate load capacity and ultimate displacement. Extensive parametric analysis was also conducted to examine the effect of various parameters on the uniaxial compression behaviors of circular and square CFST columns. | CAI JingMing PAN JinLong SHAN QiFeng | 2015 | Science China(Technological Sciences)2015，58，10： | 2 |
| 4 | 基于模态参数的软基退洪闸有限元分析显示文摘在开展软基水闸性能评估和结构健康监测时,其有限元模型建立的合理性及参数的不确定性影响模型结果。提出了BAS-PSO优化算法,并和模态参数相结合,对模型参数进行修正。构建了GA-SVR代理模型来表示模态参数和待修正系数之间的关系,减小模型计算量,增加了参数修正的计算准确度。结果表明给出的BAS-PSO优化算法收敛精度高、速度快,解决了BAS算法中变量相互影响的问题。通过对实际工程的计算证明修正方法科学合理,可为软基水闸有限元模型优化提供指导。 | 刘建超 | 2023 | 水利技术监督2023，，2： | 0 |
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