Adhesion safety detecting method of tower crane

Abstract

The invention provides an adhesion safety detecting method of a tower crane. The method comprises the following steps of: determining a force transmission relation between a tower roof system of the tower crane and the position of the tower body connected with an adhesion device through establishing a mathematical structural model of the tower crane, wherein the vibration parameter of the tower system is tested in the construction site to obtain a fixed vibration frequency of the tower crane and a maximum vibration amplitude of a hoisting weight in the vertical direction so that the stiffness coefficient of the adhesion system and the stress situation of the position of the tower body connected with the adhesion device can be obtained according to the force transmission relation between the tower roof system of the tower crane and the position of the tower body connected with the adhesion device; thus, the safety of the adhesion device of the tower crane is judged. By using the method provided by the invention, the possible dangerous working condition of the tower can be analyzed to find parts of the tower body and the adhesion device that may exceed the limit value so as to take responsive measures immediately; and effective guaranteeing effect can be generated on the safe use of the tower temporarily designed with the adhesion device.

Description

technical field [0001] The invention relates to the technical field of safety discrimination of building construction machinery, in particular to a detection method for on-site safety of an attachment device of a tower crane during use. Background technique [0002] Tower cranes are commonly used vertical transport machinery in construction, and are usually referred to simply as tower cranes. When limited by the conditions of the construction site or affected by the shape of the building or structure, sometimes the tower crane needs to be attached. The attachment device can be an attachment frame or a steel wire rope, such as the attachment frame in the construction of the bridge cable tower and the steel wire rope soft attachment system used in the cooling tower construction of the thermal power plant. This type of attachment device has obvious flexible characteristics, and if it fails, it will cause a serious collapse accident of the tower crane. [0003] With the rapid ...

AI Technical Summary

Problems solved by technology

The deformation of the attached structure will also affect the safety of the tower crane

General-purpose finite element analysis software (such as ANSYS, ADINA, ABAQUS, MSC, etc.) has powerful mechanical analysis functions, but it is necessary to use the direct generation method to model the tower crane structure, and it is necessary to input Thousands of member and node parameters are not only heavy workload, tedious, and error-prone, but once the model is generated, it is very difficult to change each time

Therefore, for different tower crane structures, it is necessary to re-model each time, and it is difficult to popularize and use it on the construction site

In addition, large-scale finite element analysis software is also difficult for engineering and technical personnel in the construction field to learn and master, which is also an important reason why finite element analysis software is generally not used for mechanical analysis in the modification design of attachment devices

[0007] According to literature search at home and abroad, there are very few detailed research materials on the static and dynamic analysis of flexible attachment tower cranes, and there is no practical method that can be used for field testing and check the strength and stiffness of tower crane attachment devices and tower body

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