Method for establishing egg shaped digestion tank simplified model

Abstract

The invention discloses a method for establishing a simplified module for egg-shaped digestion tanks; the method uses a branched modalities plus two-step analysis method, so as to establish simplified the module based on the standard module of an egg-shaped digestion tank; the steps are as follows: Establish a simplified module for the egg-shaped digestion tank body: Separate one part of the pile cap in the overall arc direction of the tank wall, so as to form the extension part of the tank wall housing and, therefore, create an intact hollow egg-shaped housing; establish the simplified module for the pile cap of the egg-shaped digestion tank: Simplify the step folding line of the pile cap into straight lines, and simplify the slope on both sides of the pile cap roof surface into a horizontal position, so as to form a V-shaped profile with a straight edge; verify the validity of the simplified module. The simplified modeling method of the invention can not only considerably reduce the total degree of freedom of the structure and improve the operation speed, but also sufficiently expand functions of all kinds of programs themselves, so as to bring forth uttermost convenience for solving complicated interaction problems in actual engineering design with prior programs.

Description

technical field

[0001] The invention belongs to the field of structural engineering and relates to a method for establishing a simplified model of a digester for dynamic analysis of the digester. Background technique

[0002] The sludge digester is one of the main structures in the process flow of large-scale sewage treatment plants using the activated sludge method. Usually, the digestion tank is basically composed of four parts: gas collecting hood, tank cover, tank body and lower cone, with stirring and heating equipment attached. The digester has a large capacity and high internal pressure. After construction, it will be full of water all the year round, with a water level of more than 10m. For large digesters, the water level can even be as high as 30m. The digester has the characteristics of high size, heavy weight, complex structure and bearing capacity, long construction period, and high cost in investment.

[0003] In water supply and drainage structures, digester...

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