Research Optimal Sensor Location Of The Hydraulic Structure

The reliability of the hydraulic structures for social and economic development has a very important effect, a correct assessment about the actual state of Hydraulic structures and effective diagnosis of building, these are the basic premise to structural safety work. Our country's hydropower stations, dams and other hydraulic buildings were mostly constructed in early 1950, some service period are more than half a century. During the time, the aging of the concrete, steel corrosion and other factors, many have become in danger of "disease dam." Our country has turned into the stage which maintain and renovate old buildings from the basic building stage. During water conservancy project operation process will damage the building, and is due to the strong turbulent flow, the fluctuating pressure acting on the structure, there is likely to cause structural vibration. Especially the modern hydraulic structures, discharge capacity, high flow rate and the structure tends to lightened development that make flow induced vibration and other issues are more prominent. To guide wall which is light hydraulic structure, the general hydraulic designers consider that only play a watershed role, Sides move or static pressure balance, but neglect the dynamic pressure of pulse pressure, due to small tensile, long-term discharge process, often leads to fatigue failure. Discharge structure is a secure channel of Water conservancy hub discharge flood water, discharge structure bear the role of high-speed water flow, due to erosion, cavitation, abrasion, and vibration produce structural damage, also be damaged under the action of earthquake, how to effectively detect the degree of damage of discharge structure, correct assessment of their safety, to ensure overall security is vital hub.Based on methods which modal analysis of structural damage identification in housing construction and bridge structure detection field has a wide application, however, the damage detection of hydraulic structures are rare, To discharge Structural damage identification based on the discharge structure is modal testing, modal testing of the effectiveness of the foundation is built on the basis of an accurate test, however, the location of sensor placement and number play a decisive role on test results. So this article studies how the limited number of sensors arranged in the best position, and provide reliability safeguard for discharge structure vibration test data, and effectively assess the work of the discharge behavior or damage situation to meet the water safe operation of need.This paper describes the significance of optimum arrangement in vibration modal testing sensors, research progress and development situation. Focus on the QR decomposition, matrix based on MAC Modal Assurance gradual accumulation method, the wet mode theory. The cantilever plate model experiments and a high arch prototype dynamic test results are optimal sensor placement method of verification. The cantilever plate model experiments and a high arch prototype dynamic test results are optimal sensor placement method of verification. Research optimal sensor layout of methods based on construction reservoir dam Shankouyan in Jiangxi Province. Vibration of high arch dam is proposed optimal sensor placement testing program, results-oriented project construction works after completion to provide the theoretical basis for testing...