Inversion method of concrete dam mechanical parameters based on multi-source monitoring time series data

Abstract

The invention discloses a multisource monitoring time sequence data-based inversion method for mechanic parameters of a concrete dam. The method comprises the steps of collecting multisource monitoring time sequence data of a physical model of the concrete dam in an experimental process of a seismic station; by adopting a 3D scanning technology, building a three-dimensional finite element dynamic analysis model; by adopting a sensitivity analysis method, determining to-be-inverted parameters; performing evaluation on the to-be-inverted parameters by a Latin hypercube sampling method, generating a to-be-inverted parameter set, and performing dynamic calculation to obtain a comprehensive evaluation index K-RPD; by utilizing a response surface method, establishing an implicit function relationship between the to-be-inverted parameters and the comprehensive evaluation index K-RPD; and by utilizing a Monte-Carlo method, calculating an optimal inverted parameter set Qmax1, namely, an inverted result. By utilizing an advanced full-process full-time-sequence monitoring method, the problem of small monitoring data amount is solved; and by utilizing a mathematic analysis method, the comprehensive index is established, so that various full-process full-time-sequence monitoring data is fully utilized and the problem of single evaluation index is solved.

Description

technical field [0001] The invention relates to the field of numerical simulation analysis of concrete dam engineering, and more specifically relates to a concrete dam mechanical parameter inversion method based on multi-source monitoring time series data. Background technique [0002] With the further development and utilization of my country's water resources, a number of large-scale water conservancy projects have started construction in areas with high seismic intensity in the southwest. Create a threat. As a method of structural seismic design inspection, large-scale seismic station experiments can simulate the dynamic response of dam structures under different earthquake intensities, reveal the catastrophe mechanism of dams under earthquakes, and provide a reliable test platform for the optimal design of structural seismicity . However, as a destructive test, the large-scale seismic station experiment has the disadvantages of long test period and high cost. In order t...

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Problems solved by technology

[0005] Aiming at the shortcomings of small amount of monitoring data, low utilization rate and single evaluation index in the existing method, the present invention provides a concrete dam mechanical parameter inversion method based on multi-source monitoring time-series data, using advanced full-field full-time-series monitoring method, obtained more complete multi-source monitoring time-series data, and solved the problem of small amount of monitoring data; using mathematical analysis methods, the multi-source monitoring time-series data was deeply excavated and utilized, and comprehensive indicators were established to make full use of Collected multiple types, full-site, and full-time series monitoring data, and solved the problem of single evaluation index

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