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本文对斜拉桥钢索中单根的钢丝疲劳试验的护套夹具进行了研究。根据计算机模拟设计的理论成果,设计制造了三种不同材料的护套夹具,并通过低应力疲劳试验,对其进行了实验分析,从中得到一种使疲劳试验成功率很高的护套夹具。并为武汉长江公路桥斜拉钢索的疲劳可靠性提供了实验依据。 相似文献
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分区式最小二乘法模式识别研究 总被引:1,自引:0,他引:1
提供了一种改进的关于智能板结构受载位置的模式识别方法.在设置有限个应变传感器和进行有限点加载的实验基础上,通过分区式最小二乘法,可对板上任意点受载的位置进行识别 相似文献
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对具有局部缺损刚度框架结构识别的逆分析问题进行了研究,在采用有限元最小二乘法的基础上,提出了非线性最小化过程的交错迭代方法。算例及分析表明,本文方法是一种精度高、收敛迅速、应用方便的逆分析方法。 相似文献
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This paper is concerned with the properties of propagation fax-field patterns corresponding to the scattering of time harmonic acoustic waves by a bounded penetrable obstacle in an ocean waveguide. The sets of solutions to the transmission problem are constructed such that the restriction of these solutions to the boundary of the penetrable obstacle is dense in a Hilbert space. Then conditions under which a set of propagation far-field patterns is complete in a Hilbert space are determined. These properties are important in investigating inverse transmission problems in an ocean waveguide. 相似文献
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山东掖县材料试验机厂是我国研制生产金属材料硬度试验机和标准硬度块的主导厂、具有二十余年研制生产的丰富经验,是机械工业部重点企业,拥有雄厚的设计制造能力和现代化测试手段,职工近千人,产品有五大类近三十个品种.多年来产品远销美国、日本、... 相似文献
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Parameters estimation online for Lorenz system by a novel quantum-behaved particle swarm optimization 下载免费PDF全文
This paper proposes a novel quantum-behaved particle swarm optimization (NQPSO) for the estimation of chaos' unknown parameters by transforming them into nonlinear functions' optimization. By means of the techniques in the following three aspects: contracting the searching space self-adaptively; boundaries restriction strategy; substituting the particles' convex combination for their centre of mass, this paper achieves a quite effective search mechanism with fine equilibrium between exploitation and exploration. Details of applying the proposed method and other methods into Lorenz systems are given, and experiments done show that NQPSO has better adaptability, dependability and robustness. It is a successful approach in unknown parameter estimation online especially in the cases with white noises. 相似文献
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本文采用静态爆破法对 AIN—SiC_w 材料进行了预制裂纹实验,研究了静态爆破剂预制微裂纹的基本方法与裂纹扩展的控制问题。研究表明:静态爆破预制AIN-SiC_w 这类脆性材料的微裂纹是一种较好的实验方法。 相似文献