A Design Method for Foundation Shaking Table of Giant Hydraulic Shaking Table

Abstract

The invention provides a method for designing a foundation vibration table of a giant hydraulic vibration table, comprising: step 1, determining the preliminary design scheme of the foundation; determining: performing preliminary design of the foundation according to the basic design parameters provided by the entrusting party, and formulating a preliminary design scheme of the foundation; step 2 , to formulate a detailed design plan for the foundation, including: adding power rooms, operating rooms and other auxiliary structures inside the foundation of the shaking table, then establishing a finite element model, performing modal analysis on it, and calculating the inherent vibration shapes of each order of the foundation of the shaking table The frequency and mode shape mass participation coefficient, the minimum value of the natural frequency obtained by the previous modal analysis is the fundamental frequency f v , compared with the allowable value of the basic frequency of the shaking table [f]; Step 3, confirm the final plan: use a calculation program to numerically analyze the vibration isolation performance of the shaking table foundation, and calculate the maximum displacement S of the shaking table base v , by comparing with the specification to see if it meets the requirements; Step 4, refine the basic design scheme.

Description

technical field [0001] The invention relates to the field of vibration control, in particular to a design method for a foundation vibration table of a giant hydraulic vibration table. Background technique [0002] The strong vibration of the foundation during the operation of the giant vibrating table will cause severe damage to the surrounding ground and buildings. The existing technology is mainly to directly increase the quality of the foundation to reduce the vibration of the foundation. The main technical defects are as follows: [0003] 1. A single solution has limited vibration reduction effect. The method of reducing vibration by increasing the mass of the foundation needs to excavate a large area of ​​earthwork, which is difficult to construct and high in project cost. Moreover, only a single method of vibration reduction is used, and the effect of vibration reduction is limited. [0004] 2. It is difficult to solve the problem that the strong vibration of the foun...

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Problems solved by technology

[0003] 1. Single solution, limited vibration reduction effect

The method of reducing vibration by increasing the mass of the foundation requires excavation of a large area of ​​earthwork, which is difficult to construct and high in project cost. Moreover, only a single method of vibration reduction is used, and the effect of vibration reduction is limited.

[0004] 2. It is difficult to solve the problem that the strong vibration of the foundation will cause severe damage to the surrounding ground and buildings when the giant shaking table is in operation.

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