CN-121997642-A - Coupling system and method for vibration and water flow excitation of flood discharge and sand flushing working gate

Abstract

The invention relates to the technical field of gate engineering, in particular to a coupling system and a coupling method for vibration and water flow excitation of a flood discharge and sand flushing working gate. The method comprises the steps of obtaining a multi-cylinder hydraulic jacking structure drawing, constructing a multi-cylinder hydraulic jacking three-dimensional model, performing gate opening simulation by using the multi-cylinder hydraulic jacking three-dimensional model to obtain gate opening parameters, calculating instantaneous leakage flow by using the gate opening parameters, analyzing vortex-induced vibration degree, performing gate leaf vibration detection on the basis of the vortex-induced vibration degree to obtain gate leaf vibration data, performing structural fatigue analysis according to the gate leaf vibration data to obtain gate leaf structural fatigue data, predicting the fatigue life of the gate leaf on the basis of the gate leaf structural fatigue data, and calculating instantaneous water pressure according to the gate opening parameters. The invention realizes the real-time analysis of the gate structure state based on the gate engineering technology, and improves the flood discharge safety and the operation reliability.

Inventors

• CAO HUIYING
• ZHANG WENKE
• Chen Xierui
• WANG XIN
• WANG CHUJUN
• XU WENBING
• WU DEXIN
• XU DEXIN
• LI ZICHONG
• LIAO DAN
• MA RENCHAO
• YU JUNYANG
• CHEN QI

Assignees

• 中国电建集团昆明勘测设计研究院有限公司
• 华能澜沧江水电股份有限公司
• 水利部交通运输部国家能源局南京水利科学研究院

Dates

Publication Date

20260508

Application Date

20251231

Claims (10)

1. 1. The coupling method of the vibration and water flow excitation of the flood discharge and sand flushing working gate is characterized by comprising the following steps of: Step S1, acquiring a multi-cylinder hydraulic jacking structure drawing, and constructing a multi-cylinder hydraulic jacking three-dimensional model; S2, calculating instantaneous leakage flow by using gate opening parameters, and analyzing vortex-induced vibration degree; S3, carrying out structural fatigue analysis according to the vibration data of the gate leaves of the gate to obtain structural fatigue data of the gate leaves; And S4, calculating the instantaneous water pressure according to the gate opening parameter, calculating the door leaf surface stress by utilizing the instantaneous water pressure, and correcting the fatigue life of the door leaf based on the door leaf surface stress to obtain gate life data.
2. 2. The method for coupling vibration and water flow excitation of a flood discharge and sand wash working gate according to claim 1, wherein step S1 is specifically: step 11, acquiring a multi-cylinder hydraulic jacking structure drawing; s12, identifying a two-dimensional contour by utilizing a multi-cylinder hydraulic jacking structure drawing, and determining a two-dimensional contour coordinate; S13, constructing a multi-cylinder hydraulic jacking three-dimensional surface patch based on two-dimensional contour coordinates; Step S14, performing assembly according to the multi-cylinder hydraulic jacking three-dimensional surface patch to obtain a multi-cylinder hydraulic jacking three-dimensional model; And S15, performing gate opening simulation by using the multi-cylinder hydraulic jacking three-dimensional model to obtain gate opening parameters.
3. 3. The method for coupling vibration and water flow excitation of a flood discharge and sand wash working gate according to claim 1, wherein step S2 is specifically: s21, extracting an effective flow area by using a gate opening parameter; Step S22, acquiring the height of an upstream water head, and calculating gate flow rate data according to the height of the upstream water head and the effective flow area; S23, carrying out flow integral calculation based on gate flow velocity data to obtain instantaneous leakage flow; S24, analyzing vortex-induced vibration degree by utilizing the instantaneous leakage flow; and S25, detecting the vibration of the gate leaf based on the vortex-induced vibration range to obtain the vibration data of the gate leaf.
4. 4. The method for coupling vibration and water flow excitation of a flood discharge and sand wash working gate according to claim 2, wherein step S24 is specifically: step S241, calculating a local Reynolds number by utilizing the instantaneous leakage flow; Step S242, carrying out vortex analysis according to the local Reynolds number to obtain vortex data; s243, calculating vortex frequency based on vortex data, and evaluating the exciting force of the door leaf according to the vortex frequency; And S244, quantifying the vortex-induced vibration degree according to the door leaf exciting force.
5. 5. The method for coupling vibration and water flow excitation of flood discharge and sand wash working gate according to claim 4, wherein step S242 is specifically: Extracting speed gradient information according to the local Reynolds number; calculating a vortex field by using the speed gradient information; Identifying a vortex region according to the vortex quantity field, and determining the rotation strength of the vortex region; and analyzing vortex disturbance force based on the rotation intensity to obtain vortex data.
6. 6. The method for coupling vibration and water flow excitation of a flood discharge and sand wash working gate according to claim 4, wherein the calculating of vortex frequency based on vortex data is specifically: ; Wherein, the Is the vortex frequency; the vortex ring quantity is obtained by integrating the speed of a vortex core area along a closed path; the vortex core area projection is used for describing the vortex scale; the effect of the core rotational intensity on the frequency is expressed, the frequency being proportional to the square root of the rotational intensity.
7. 7. The method for coupling vibration and water flow excitation of a flood discharge and sand wash working gate according to claim 4, wherein the step of estimating the leaf exciting force according to the vortex frequency is specifically: matching vortex action points according to vortex frequency; identifying the normal force of the vortex action point along the door leaf; synthesizing the instantaneous exciting force of the vortex action point according to the normal force and the exciting force; And carrying out space superposition on the instantaneous exciting force of the vortex action points of all the points, and determining the exciting force of the door leaf.
8. 8. The method for coupling vibration and water flow excitation of a flood discharge and sand wash working gate according to claim 1, wherein step S3 is specifically: S31, determining the vibration amplitude of a gate leaf according to the vibration data of the gate leaf of the gate, evaluating the rigidity of a plate surface by using the vibration amplitude of the gate leaf, identifying an unstable region according to the rigidity of the plate surface, and carrying out material thinning detection on the unstable region to obtain material thinning data; step S32, determining local collapse degree based on the material thinning data, and determining the damage degree of the plate surface according to the local collapse degree to obtain plate surface damage data; S33, carrying out frame deformation analysis according to the vibration data of the gate leaves to obtain frame deformation data; step S34, integrating the panel damage data and the panel damage data to obtain door leaf structure fatigue data; And S35, predicting the fatigue life of the door leaf based on the structural fatigue data of the door leaf.
9. 9. The method for coupling vibration and water flow excitation of a flood discharge and sand wash working gate according to claim 8, wherein step S33 is specifically: S331, extracting vibration signals according to the vibration data of the gate leaves; Step S332, performing secondary integration based on the vibration signal to obtain frame displacement data; s333, calculating frame deflection according to frame displacement data; and step 334, evaluating the deformation degree of the frame according to the deflection of the frame to obtain frame deformation data.
10. 10. A system for coupling flood discharge and sand wash working gate vibration and water flow excitation, wherein the system for coupling flood discharge and sand wash working gate vibration and water flow excitation according to claim 1 comprises: The gate opening simulation module is used for acquiring a multi-cylinder hydraulic jacking structure drawing and constructing a multi-cylinder hydraulic jacking three-dimensional model; The gate leaf vibration detection is used for calculating the instantaneous leakage flow by using the gate opening parameter and analyzing the vortex-induced vibration degree; The gate leaf fatigue life prediction is used for carrying out structural fatigue analysis according to gate leaf vibration data to obtain gate leaf structural fatigue data; The instantaneous water pressure calculation module is used for calculating instantaneous water pressure according to the gate opening parameters, calculating the gate leaf surface stress by utilizing the instantaneous water pressure, and correcting the gate leaf fatigue life based on the gate leaf surface stress to obtain gate life data.

Description

Coupling system and method for vibration and water flow excitation of flood discharge and sand flushing working gate Technical Field The invention relates to the technical field of gate engineering, in particular to a coupling system and a coupling method for vibration and water flow excitation of a flood discharge and sand flushing working gate. Background Currently, the flood discharge and sand flushing working gate is widely applied to hydraulic hubs, ship locks and large-scale hydraulic machinery, but under the conditions of high flow, frequent opening and closing and complex hydraulic power, gate leaves are easy to vibrate by vortex-induced vibration, fluid impact and instantaneous hydraulic pressure, so that vibration amplitude is increased, structural fatigue is aggravated and materials are locally damaged, and the operation safety and the service life of the gate are affected. In the prior art, the research on the structural performance of the gate is mainly focused on integrally thickening plates or adopting high-strength steel to improve the rigidity, but the method not only increases the weight and the manufacturing cost of the gate leaves, but also puts higher requirements on a jacking driving system. Meanwhile, the traditional vibration analysis and fatigue evaluation depend on empirical formulas or local detection, so that dynamic load distribution under different opening and flow working conditions is difficult to comprehensively reflect, the local fatigue risk is difficult to accurately predict, and fatigue cracks and material failure are easy to occur. In addition, the existing gate jacking scheme is mostly single-cylinder or double-cylinder jacking, and the problems of poor synchronism, insufficient vibration superposition effect, insufficient utilization of local reinforced structures and the like exist under multi-cylinder synchronization and complex hydraulic excitation, so that long-term reliable operation cannot be effectively ensured. Disclosure of Invention Accordingly, there is a need for a system and method for coupling vibration and water flow excitation of a flood discharge and sand wash working gate that solves at least one of the above-mentioned problems. In order to achieve the purpose, the coupling method of vibration and water flow excitation of the flood discharge sand washing working gate comprises the following steps: Step S1, acquiring a multi-cylinder hydraulic jacking structure drawing, and constructing a multi-cylinder hydraulic jacking three-dimensional model; S2, calculating instantaneous leakage flow by using gate opening parameters, and analyzing vortex-induced vibration degree; S3, carrying out structural fatigue analysis according to the vibration data of the gate leaves of the gate to obtain structural fatigue data of the gate leaves; And S4, calculating the instantaneous water pressure according to the gate opening parameter, calculating the door leaf surface stress by utilizing the instantaneous water pressure, and correcting the fatigue life of the door leaf based on the door leaf surface stress to obtain gate life data. Preferably, the present specification also provides a coupling system of flood discharge and sand wash working gate vibration and water flow excitation for performing the coupling method of flood discharge and sand wash working gate vibration and water flow excitation as described above, the coupling system of flood discharge and sand wash working gate vibration and water flow excitation comprising: The gate opening simulation module is used for acquiring a multi-cylinder hydraulic jacking structure drawing and constructing a multi-cylinder hydraulic jacking three-dimensional model; The gate leaf vibration detection is used for calculating the instantaneous leakage flow by using the gate opening parameter and analyzing the vortex-induced vibration degree; The gate leaf fatigue life prediction is used for carrying out structural fatigue analysis according to gate leaf vibration data to obtain gate leaf structural fatigue data; The instantaneous water pressure calculation module is used for calculating instantaneous water pressure according to the gate opening parameters, calculating the gate leaf surface stress by utilizing the instantaneous water pressure, and correcting the gate leaf fatigue life based on the gate leaf surface stress to obtain gate life data. The invention has the following beneficial effects: according to the first aspect, the change rule of the opening degree of the gate can be accurately mastered in the design and simulation stage, reliable data input is provided for leakage flow and vibration analysis, and the design accuracy and reliability are improved. In the second aspect, the influence of water flow excitation on vortex-induced vibration of the door leaf can be quantified, the door leaf vibration characteristic data can be obtained, scientific basis is provided for structural health monitoring and abnormal early w