Method for inverting underwater explosion pressure of dam surface

Abstract

The invention provides a method for inverting dam surface underwater explosion pressure, which comprises the following steps of: arranging underwater explosion pressure measuring devices at an underwater measuring point and a dam surface measuring point to obtain explosion pressure of different measuring points of field explosion; processing the measured data to obtain an explosion pressure time history curve and an explosion pressure peak value of the underwater measuring point, and fitting to obtain an attenuation formula; a theoretical distance L1 between the explosion source and the sensor and a theoretical distance L2 between the sensor and the dam surface are calculated according to an attenuation formula and actually measured explosion pressure related data of the dam surface measuring point; the L1 and the L2 are superposed to serve as the theoretical distance between the explosion source and the dam face, and the theoretical value of the incident pressure of the dam face is inversed according to an attenuation formula; and assuming that the attenuation laws of the reflected wave and the incident wave are the same, inverting the theoretical value of the dam surface reflection overpressure according to the actually measured reflection overpressure in combination with an attenuation formula. According to the method, the real position of the sensor arrangement can be determined according to the field underwater explosion measured data, the measurement error is corrected, and accurate and reasonable inversion of the dam surface underwater explosion pressure is realized.

Description

technical field [0001] The invention belongs to the technical field of underwater explosion, and in particular relates to a method for reversing the underwater explosion pressure on a dam surface. Background technique [0002] The dam surface explosion pressure is an important reference for estimating the concrete modal parameters of the dam surface, and obtaining reliable dam surface explosion pressure is the prerequisite for accurately estimating the concrete modal parameters. The existing methods for determining the underwater explosion pressure on the dam surface mainly use sensors and other underwater explosion pressure measuring devices to directly obtain measured data. The real pressure on the dam face. At the same time, due to the limitation of field experiment conditions and various uncertain factors, the arrangement of sensors on the dam surface will inevitably lead to installation errors. For example, when there is a small angle between the facing wall of the da...

AI Technical Summary

Problems solved by technology

The existing methods for determining the underwater explosion pressure on the dam surface mainly use sensors and other underwater explosion pressure measuring devices to directly obtain measured data. real pressure on the dam face

At the same time, due to the limitation of field experiment conditions and various uncertain factors, the layout of the sensors on the dam surface will inevitably lead to installation errors.

For example, when there is a small angle between the facing wall of the dam and the vertical direction, the measurement error produced by the underwater sensor may further expand, which poses a challenge to accurately determine the underwater explosion pressure of the dam surface and the modal parameters of the dam surface concrete

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