The finite element analysis of the excavator arm in the CATIA
Abstract
The arm is a key component of excavators as well as load-bearing parts. Excavators
have to bear the impact of complex Load, and the arm designed according to
traditional static method usually appears the problem of lacking strength and stiffness
in the working process, and whether the arm meets the demand will have a direct
affect on the security. So understanding the arm’s stress, strain capacity and the
vibratory frequency, as well as strength and stiffness is very important for our
optimizing the structure of arm. In this paper, it mainly analyzes the kinematics and
force of hydraulic excavator and introduces its working modes, at the same time
discussing the influence factors of excavation resistance. Besides, establish
three-dimensional model of the arm with CATIA , and make a force analysis on
typical working condition, researching the stress and strain and checking that the
strength meets the design demands as well as analyzing the modal structure, and then
obtain the vibration shape line. At last, after checking, the strength of arm meets the
design demands, and the arm’s natural frequency and the working frequency will not
resonate,which make a good condition for next optimization on the structure of arm.
Key words: CATIA The arm Static analysis Modal analysis