Crane fatigue analysis system and method

Abstract

The invention belongs to the technical field of crane fatigue data processing, discloses a crane fatigue analysis system and method. The method includes: establishing a crane structure random fatiguelife intelligent evaluation system based on the combination of static testing and random dynamic testing of an operation process; performing crane structure fatigue source positioning and stress correction based on finite element simulation analysis; cyclically including load lower than the fatigue limit in the load spectrum, and evaluating the fatigue life and safety of the structure through thepiecewise linear damage accumulation theory. Experiments, simulation and theoretical analysis are combined, the actual load process and working conditions of the tested crane metal structure can be reflected, the real weak link of the tested crane and the influence of the real weak link on the safety of the metal structure can be reflected, and safe production is guaranteed; crane overhaul and maintenance plans can be reasonably made for use units, and a large amount of manpower and material resources are saved. The disordered production rhythm is avoided as much as possible and the productionefficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of crane fatigue data processing, and in particular relates to a crane fatigue analysis system and analysis method. Background technique [0002] Currently, the closest prior art: [0003] As a mechanical equipment for material handling, loading and unloading or installation, hoisting machinery can reduce or replace people's physical labor and improve labor productivity. With the development of production and technology, hoisting machinery has developed from auxiliary equipment to an indispensable equipment for mechanization and automation of production, and has even become a key equipment that cannot be ignored in process production. Crane production efficiency and reliability have a direct impact on production output and product quality. [0004] With the development of modern science and technology, more stringent requirements are put forward for the metal structure of hoisting machinery. Cranes must no...

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Problems solved by technology

As a result, the application of fracture mechanics theory to crane fatigue failure analysis and safety assessment cannot be extended to industrial applications.

[0032] (2) The establishment of the crane fatigue load spectrum is directly related to whether the fatigue life can be accurately predicted. There are few establishments of the crane fatigue load spectrum in the literature. Due to the different working conditions of the cranes, the load spectrum does not have universality, so it is extremely urgent to establish the load spectrum of the crane

[0033] (3) The traditional method is to use the theory of material mechanics to find out the maximum stress position, which does not conform to the actual situation and the accuracy is not high

[0039] Structural fatigue is a very complex problem, and there are a wide range of factors that affect structural fatigue and remaining life, and most of the factors cannot be described quantitatively from the physical meaning and mathematical model.

Although a lot of theoretical and experimental experience has been accumulated in the research, there is a big difference between the experimental environment and the actual working environment in the fatigue test, and there is a lack of relatively complete research on the fatigue damage and life prediction of the metal structure of the crane. Whether it is There are still relatively large flaws and gaps in theory and in the formulation of norms

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