Method for Determination of Micro-vibration Design Load of Foundation

A technology for designing loads and determining methods, which is applied in design optimization/simulation, instrumentation, electrical and digital data processing, etc.

Active Publication Date: 2022-04-01
GENERAL ENG RES INST CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The usual practice is to take a conservative flat spectrum directly as the load input according to relevant codes or documents, but this method may make the structural evaluation unable to meet the index design requirements because the load amplitude is too conservative

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  • Method for Determination of Micro-vibration Design Load of Foundation
  • Method for Determination of Micro-vibration Design Load of Foundation
  • Method for Determination of Micro-vibration Design Load of Foundation

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Embodiment Construction

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

[0042] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative...

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Abstract

The invention discloses a method for determining the micro-vibration design load of the foundation, which includes the following steps: carrying out uninterrupted vibration tests at multiple positions at a specific depth of the foundation, and obtaining the micro-vibration time domain signals of each measuring point; formulating reasonable criteria and algorithms to Effectively eliminate the abnormal interference pulses in the time domain vibration signal; remove the zero drift of the data after removing the abnormal interference, carry out power spectral density analysis, and obtain the power spectral density envelope of the test data; based on the calculated power spectral density envelope According to certain rules, the magnitude of the load is increased to obtain the design load of the micro-vibration of the foundation. The invention provides a method for determining the micro-vibration load of the foundation for the building structure of the precision instrument device, and provides more real and reasonable load input for its site selection, vibration response analysis, and technical index evaluation.

Description

technical field [0001] The invention relates to the technical field of structural dynamics, in particular to a method for determining a foundation micro-vibration design load. Background technique [0002] For equipment and facilities sensitive to micro-vibration (such as precision optical devices), in order to accurately evaluate the structural response under the micro-vibration load of the foundation, it is necessary to obtain the micro-vibration load conditions of the foundation at the location of the structure as the load input for structural analysis and evaluation. The usual practice is to take a conservative flat spectrum directly as the load input according to relevant codes or documents, but this method may make the structural evaluation unable to meet the index design requirements because the load amplitude is too conservative. Foundation microvibration is a type of typical ground pulsation random vibration. Its amplitude and spectrum characteristics are sensitivel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F119/14
CPCG06F30/20G06F2119/14
Inventor 沈展鹏范宣华胡绍全李思忠陈学前鄂林仲阳杜强
Owner GENERAL ENG RES INST CHINA ACAD OF ENG PHYSICS
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