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本文用样条有限元和半解析无限元分析结构-土相互作用,并分析了上部结构-地下隧道-土相互作用地震反应,该方法具有降低维数,减少自由度,避免人为处理地基边界条件等特点,并可考虑复杂成层地基的情况。 相似文献
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基于单幅图像三维形貌恢复的研究尚未进行系统的测量不确定度分析.文章在已获得的三维测量结果的基础上,提出并使用了“全面像素不确定度评价方法”,改变传统的以物体关键部位不确定度代替全貌不确定度的评价方法,将被检三维物体形貌恢复结果的每个像素,均参与到测量不确定度评价过程中.通过全面测量不确定度的研究可以全面了解三维形貌恢复的状况,有助于进行精度的改进,并可根据精度分布状况,进行有针对性的测量. 相似文献
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In order to realize the rapid detection of three-dimensional defects of connectors, this paper proposes a method for detecting connector defects based on structured light. This method combines structured light with binocular stereo vision to obtain three-dimensional data for the connector. Point cloud registration is used to identify defects and decision trees are used to classify defects. The accuracy of the 3D reconstruction results in this paper is 0.01 mm, the registration accuracy of the point cloud reaches the sub-millimeter level, and the final defect classification accuracy is 94%. The experimental results prove the effectiveness of the proposed three-dimensional connector defect detection method in connector defect detection and classification. 相似文献