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Photoelastic Stress Analysis of Hydraulic Structures Review of the Development

Some progress, writing a theoretical value of the article. Flexibility in the law other than the traditional light,[link widoczny dla zalogowanych], with the 20th century, 70 developed laser technology, ASTRI has built a long laser laboratory, to design holographic platform, after processing, and self-installation. Optical components in the purchase after the holographic plate and launched a holographic photoelastic model test plane (colored lines and also to obtain other data such as thick lines), such as the absolute other way line method and speckle method. Plane model is limited to such applications, as many three-dimensional photoelastic task, holographic photoelasticity has been rarely used. In addition, the optical measuring technology of the moire method,[link widoczny dla zalogowanych], also made some involved. Dimension 1984 into the United States Association (vishay) Company M401 automatic photo-elastic apparatus, installation and commissioning, it was found that the instrument is mainly used for point measurements, sliced in 2 mm below, can not hope for the implementation of the original audience, such as oblique, automatic enrollment data . After not playing a big role. Ten, technical exchange in the technical exchanges,[link widoczny dla zalogowanych], long ASTRI photoelastic group often linked to domestic annual meeting. Hydraulic structures such as the China Water Conservancy Society of Professional Association and the Chinese Society of Experimental Stress Analysis Professional mechanics will be, Hubei Province and Wuhan Water Conservancy Association, the total mechanical science section 15 · f in June 1480 J2004 length album Clement Quarterly Centrifuge Model Test and science Test Technology First, an overview Zhou Xiaoyan is the use of centrifuge modeling simulation of a centrifugal force field gravity field, with the scale model of the object by the acceleration due to gravity after a variety of physical phenomena. 1869 E. French Academy of Sciences Phillips first proposed using gravitational field instead of the centrifugal force field. Hydraulic Institute in Moscow in 1932, the Soviet Union built the world's first centrifuge. Columbia University, USA in 1935 Pakistan (Buky) professor, using a small centrifuge and method of use of photoelastic stress distribution in the mine corridor. At the same time the Soviet Union also used the centrifuge done a lot of research work, not only playing light weight solution to a lot of structural stress problems, and will promote the use of centrifuges to the field of soil mechanics. 7O 2O century into the years after the centrifuge model test period of development, many of the world more than the developed countries have built large and medium sized centrifuges for geotechnical engineering, and advanced test technology for the centrifuge model tests, the establishment of a test simulation theoretical and experimental techniques to study problems involving almost all areas of geotechnical engineering, and has achieved a great deal of experimental research, this study shows a wide range of technology applications. ASTRI is the first to carry out long-centrifuge model test unit. As early as 1957, proposed to build a large centrifuge, and the help of experts in the Soviet Union carried out design work, but for various reasons have not yet built. 2O century and the early 60s to meet the photoelastic test technology development, design and build their own long ASTRI a diameter of 2.3 meters in photoelastic model tests for a small centrifuge, 7O pushed the early centrifuges Mega effective diameter from 2.3 to 3.8 meters big. 7O centrifugal end of the decade with the international simulation experiments in many areas of development, structure and length of the start of construction ASTRI integrated application of geotechnical centrifuge 6 meters large, formal operation in 1983. Large centrifuge effective radius of 3 meters and a maximum acceleration of 300g (g is acceleration due to gravity), 1 ton maximum load capacity of 300g · tons. This is the first built for large-scale geotechnical centrifuge, a large centrifuge and test long ASTRI Technology in 1992 by the Ministry of Water Resources Science and Technology Progress Award in 1993 by the National Science and Technology Progress Award, tied for the major national scientific and technological achievements. Niu Lei Lei 8G8 8G 8G8G8 such as 8, 88 Lei Zhou Lei 8G88 8 for 8 letter 8s88G868 business letter of snow also have Blue 888 Blue Ray Blue also has 88 letters 888888G8888 Council Hydropower Engineering Society and the Optical Society presented papers and attended conferences and participation in Gezhouba and Three Gorges Project will exchange scientific and technological achievements and so on. In 1979, ASTRI long hydraulic structures by the Chinese Hydraulic Engineering Society Committee of commission, chaired the stress analysis of hydraulic structures of academic exchanges. 8O's, has hosted technical workshops photoelastic material, the audience dipped technical workshops, and participate in the national water system of light measurement technology seminars teaching. Preparation of a \And by the China Institute of Water Resources and Hydropower,[link widoczny dla zalogowanych], Tsinghua University, Long ASTRI, Yellow River Conservancy Research Institute, Chengdu, jointly prepared by the Survey and Design Research Institute, \In addition, internal communications produced \
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