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904 type tractor is dongfeng agricultural machinery group is a mature product， the machine chassis with design margin in the beginning of the design for the development of new models is In the long-term use process found that the machine chassis overall structural strength is good， so hope that in its development on the basis of 1254 type tractor To reduce design risk， apply the finite element analysis method to check calculation of 904 type tractor chassis， find out weak links and puts forward improvement scheme in the design of the On this basis， the 1254 type tractor chassis design scheme is put forward， and carries on the finite element calculation checking again， in order to ensure the reliability of the 1254 type tractor chassis design of highly inherited 904 type tractor chassis parts， only to redesign the front bracket and the rear axle shell， increase the universality and interchangeability of the different power section of tractor parts， beneficial for series Check analysis， for the 1254 type tractor chassis in examining various components on the basis of the structural strength， for the first time， puts forward the evaluation index of contact pressure， the pressure distribution on the surface of the contact between different parts， the influence of joint stiffness between This article main research content:According to the 904 type tractor chassis structure， tractor chassis geometry model is built by using SolidWorks software， before use of professional processing software Hypermesh meshing geometric model and finite element model is Refer to foreign enterprises tractor test method， to determine the working condition of the seven calculation， simulation of tractor may encounter all sorts of bad situation in practical work， which can effectively evaluate the tractor chassis structure strength meets the design requirements， using ANSYS software of finite element model of the structure strength analysis， get the chassis in various parts of the stress distribution nephogram， finding out the weak point of parts of the chassis structure， the serious stress concentration parts (including the front carrier， clutch shell， final drive shell) for structural improvements， improved chassis stiffness was promoted as a Using 904 type tractor chassis and similar calculation， analysis and calculation of 1254 type tractor chassis are analyzed to verify， through the analysis of stress nephogram， of 1254 type tractor driving axle shells are found stress concentration phenomenon， and give the improvement plan， improved stress concentration is improved; Found that the rear axle shell and the shell of the clutch is poorer， the connection between the stiffness correspondingly two improvement schemes are put By comparing the improved contact pressure stress distribution， improve the feasibility of scheme 1 is 希望对你有帮助谢谢！望采纳！
904 type tractor is Dongfeng Agricultural Machinery Group is a relatively mature product， the chassis was designed from the beginning with the design margin， prepared for the development of new Found in the process of long-term use， the chassis structure strength is good， so I hope to develop type 1254 tractor chassis on the basis In order to reduce design risk， first using the finite element method to calculate 904 type tractor chassis， find out the weak links of chassis design and put forward the improvement On this basis， puts forward the design scheme of 1254 type of tractor chassis， and the finite element calculation， to ensure reliability design Design 1254 type tractor chassis height inherited parts of 904 type tractor chassis， only the redesign of the front bracket and the rear axle housing， improve the power of different period of tractor parts commonality and interchangeability， conducive to series production Check on the analysis of 1254 type of tractor chassis， on the base of reviewing the various parts of structure strength， first proposed the evaluation index of contact pressure， contact between different parts of the pressure distribution on the surface， on the effects of connection stiffness between The main research contents of this paper: according to 904 type tractor chassis structure， set up the geometric model of tractor chassis using the SolidWorks software， carries on the grid division of the geometric model by using Hypermesh software professional， the finite element According to the foreign enterprise test method for tractor， identified seven calculating conditions this calculation， meet all kinds of harsh environment simulation of tractor may in reality， can effectively evaluate tractor chassis structure strength whether meet the design requirements， the finite element model of the structure strength analysis using ANSYS software， obtained stress distribution nephogram of the parts of the chassis the chassis， find out the weak parts of structure， the stress concentration is more serious parts (including a front bracket， clutch housing， final drive housing) were improved， the improved overall chassis rigidity is Using the calculation conditions similar to the calculation and type 904 tractor chassis analysis， analysis of 1254 type tractor chassis， by analyzing the stress nephogram， found the rear axle housing type 1254 tractor exists the phenomenon of stress concentration， and gives the improved scheme， the improved stress concentration situation has improved; the connection stiffness between the poor after the discovery of the axle housing and clutch shell， put forward 2 kinds of Compressive stress distribution through the comparison of the improved contact， obtains the improvement scheme of 1 higher
