Safety Performance Analysis And Vibration Noise Study Of Excavator Cab

Excavator is a kind of engineering machinery and it is used for digging soil and ore. In the engineering construction, they have extremely extensive application. But in a excavator's construction process, an accident of pouring or falling object may happen which seriously threat driver's life health and safety, meanwhile, it also can produce a great influence to an excavator driver and the surrounding environment because of noise, which will form the noise pollution. This requires an excavator not only has good safety performance but also to control noise to some extent.In this paper the roll over protect structure (ROPS) and the falling protect structure (FOPS) of an excavator are mechanically analyzed, proposed performance of computer simulation with nonlinear method to FOPS and ROPS. Considering the simulation accuracy and time-consuming, we simplified the factors and selected the appropriate materials, first based on the model, establish finite element model of FOPS and ROPS by the beam element, through the simulation, obtained the displacement and stress of the model which cloud judgment whether it can meet the safety performance requirements cab or not.Meanwhile, in this paper the vibration noise of excavator cab is also researched. The cab noise include body noise and interior noise, in this paper the control methods of the body noise and the interior noise are introduced, mainly including the structure resonance, to prevent cab isolation, sound insulation, sound-absorbing, etc.In this paper, the characteristics of an excavator cab vibration noise are analyzed prediction by the finite element method. Three-dimensional structure is established by the finite element software ANSYS (beam and cab cavity wall). With APDL language of ANSYS we establish the interaction of sound-solid coupled model to consider the driving indoor air and wall structure, analysis the coupling model, through the modal analysis.Finally using Full (completely method), we analyzed harmonic excitation force vibration response of the coupling model of cab. Consider acoustic solid-coupling dynamic analysis of the coupling model of gains from conclusion, which is a guidance for the purpose of driving indoor noise we can improve structure, the model can effectively lower the noise level of the cab, thus it is that using the finite element method for dynamic characteristic to analysis harmonic excitation force vibration response of cab and the method of guide improvements to achieve excavator cab noise is feasible.This paper analyzed the safety performance of an excavator cab and vibration noise, this research for excavator cab can provide certain reference and the reference value to the design of an excavator cab.