Three-dimensional atlas method for researching stress characteristics of working device of excavator

Abstract

The invention relates to a three-dimensional atlas method for researching stress characteristics of a working device of an excavator. Kinematic and mechanical analysis is conducted on the whole excavator by obtaining the digging resistance coefficient and the resistance moment coefficient, and a theoretical digging force solving model is built; integrated finite element analysis is conducted on the working device on the basis of working device area planning to obtain the maximum stress values and corresponding area numbers of a movable arm, a bucket rod, a bucket and the whole working device, and the maximum stress values and spatial distribution of the areas where the maximum stress values are located are visually presented; finally, a dangerous working condition of a certain machine type is selected through stress research and compared with a classic working condition. The MBRS-3D method provides a new way for similar characteristic research.

Description

technical field [0001] The invention belongs to the technical field of excavator working devices, and relates to a three-dimensional atlas method for studying stress characteristics of excavator working devices. Background technique [0002] The working device is the executive part of the hydraulic excavator, which has an important impact on the performance of the entire hydraulic excavator. Therefore, scholars at home and abroad have done a lot of research on hydraulic excavator working devices. [0003] By summarizing the existing research, it can be seen that most of the working devices cannot realize automatic regular hexahedral mesh division when dealing with a large number of finite element analyzes repeatedly; there are also literatures that only study a single part of the working device, ignoring the integrity and coordination of the working device. sex, which increases the analysis error; traditional grading and two-dimensional maps are in the face of figure 1 Whe...

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Problems solved by technology

[0003] By summarizing the existing research, it can be seen that most of the working devices cannot realize automatic regular hexahedral mesh division when dealing with a large number of finite element analyzes repeatedly; there are also literatures that only study a single part of the working device, ignoring the integrity and coordination of the working device. Sexuality, which increases the analysis error; traditional grading and two-dimensional maps are in the face of figure 1 When the tooth tip position shown corresponds to the infinite attitude, it cannot be fully analyzed

In addition, on the basis of consulting a large number of literatures, it is found that most of the structural analysis is based on dangerous conditions. However, there are few studies on dangerous conditions at present, and most of the literature directly adopts classical conditions.

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