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Prediction Method of Site Vibration Induced by Flood Discharge and Energy Dissipation

A prediction method and site technology, applied in the direction of machine/structural component testing, measuring devices, impact testing, etc., can solve the problems of high coupling that is difficult to deal with, low accuracy of calculation results, and low cost, and achieve low cost, easy processing, and Proven and Reliable Effects

Active Publication Date: 2017-05-31
NANJING HYDRAULIC RES INST
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Problems solved by technology

The advantage is that the cost is low, and the vibration response prediction of various flood discharge conditions can be performed. The disadvantage is that the current calculation method is difficult to deal with the high coupling between the complex hydraulic characteristics and the structural dynamic characteristics, and the accuracy of the calculation results is low.

Method used

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  • Prediction Method of Site Vibration Induced by Flood Discharge and Energy Dissipation
  • Prediction Method of Site Vibration Induced by Flood Discharge and Energy Dissipation
  • Prediction Method of Site Vibration Induced by Flood Discharge and Energy Dissipation

Examples

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Embodiment 1

[0029] This example is a large-scale hydropower station in my country. Since its flood discharge, the downstream 3km 2 Site vibration phenomena such as shaking of rolling shutter doors, rattling of doors and windows of residential buildings and school buildings, and swinging of chandeliers occur within the scope.

[0030] The prediction method of site vibration induced by flood discharge and energy dissipation provided by the present invention is carried out in the following steps:

[0031] Step 1: Carry out prototype observations on typical flood discharge conditions to obtain vibration responses at characteristic measuring points on site. The six typical flood discharge conditions in this embodiment are shown in Table 1, and three main factors, discharge volume, gate operation mode, and maximum vibration velocity, are considered. The layout of the three characteristic measuring points on site is shown in Table 2 and figure 1 As shown, different distances, geological condit...

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Abstract

The invention relates to a method for predicting soil vibration caused by flood discharge and energy dissipation and belongs to the field of safety of vibration caused by flood discharge and energy dissipation. The method comprises the following steps: firstly, under the typical working condition, acquiring soil vibration response by a prototype observation method, then acquiring an area fluctuating pressure excitation load by adopting a hydraulic model test and establishing a correlation between the soil vibration response and the area fluctuating pressure excitation load; then acquiring an excitation load under the to-be-predicted working condition by the hydraulic model test and substituting the excitation load into the established correlation to obtain a vibration response predicted value. The predicting method provided by the invention has high accuracy, can be applied to various flood discharge conditions, is low in cost and is reliable and easy to operate.

Description

technical field [0001] The invention relates to a method for predicting site vibration induced by flood discharge and energy dissipation, and belongs to the field of flood discharge energy dissipation vibration safety. Background technique [0002] The site vibration induced by flood discharge and energy dissipation of large-scale water conservancy and hydropower projects lasts for a long time, has a wide range of influence, and is difficult to deal with. It is a new problem in the field of flood discharge energy dissipation vibration safety. The site vibration response under different operating conditions is the most basic parameter for evaluating vibration safety, taking treatment measures, and formulating emergency plans. Therefore, it is of great significance to predict the amount of site vibration induced by flood discharge and energy dissipation. [0003] At present, there are three main methods to obtain the vibration response induced by energy dissipation of flood di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M7/08
Inventor 骆少泽张陆陈胡亚安王新
Owner NANJING HYDRAULIC RES INST
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