The Optimal Study On The X Type Seat Of Hand Tractor By Virtual Prototype Technology

Using Virtual Prototype Technology, and based on the structural characteristics of the human and the tractor, a human body is modeled as a nonlinear mechanical system, and a nonlinear multi-freedom-degree vibration model for the human-seat-tractor system is derived at the environment of ADAMS/View in this paper. And simulation-analysis is done for two status of the tractor without seat and with seat when the tractor runs with three different accelerations. At the same time , the parameters influencing the vibration characteristics of the seat are optimized . In the end, a proper value is done according as ISO2631 -standard . The result makes clear: the effect of vibration insulation of the X-seat is better and the seat can largely attenuate the vibration of human in the range of 4⁸Hz in which human's feel is sensed when the rigidity k₁ of the main constringent spring , the rigidity k₂ of the constringent pre-spring, the rigidity k₃ of the drawing-extending spring and the equivalent damping coefficient C of damper are respectively 5.0N/mm, 0.6N·s/mm, 17.0N/mm, 8.0N/mm...