According to the mechanical conditions of ty220 crawler bulldozer , the strength analysis and test research for the frames under different operations are proceeded . the main contents included in this paper as follows : 1 本文针对ty220履带式推土机的受力状况,对台车架不同工况进行了强度分析与试验研究,主要内容包括: 1
The frames of bulldozers is the key parts which connect mainframe with bearing elements on ground the loads on frames are so great that the frames are liable to cause deformations as to affect the normal work of bulldozers 履带式推土机作业工况恶劣,台车架是连接主机架与地面支承元件的关键部件,其受力较大,容易发生变形而影响正常工作。
Three kinds of calculating operation for the bulldozer are given the finite element calculating models are founded . the static construction strength analyzes are proceeded to the frame of ty220 bulldozer . the dangerous area and its position are found out 给出了推土机三种计算工况,建立了推土机台车架有限元计算模型,对ty220推土机台车架进行了静态结构强度分析,找出了危险区域和部位。
In this paper , three kinds of static test operations are given such as the shovel descended with the front - end of the bulldozer lifted , the ridger descended with the rear - end of the bulldozer lifted , the shovel and the ridger descended with the whole body of the bulldozer lifted the static tests for the frame of ty220 bulldozer are proceeded . the result of finite element analysis is contrasted with that of experiment the mechanical model and the result of finite clement analvsis are verified by experiment and the theoretical bases are provided for the improving design of frames 4 according to the results of calculations and tests , the suggestion is presented for improving the design of the frame of ty220 bulldozer 给出了铲刀下移推土机前端抬起,松土器下移推土机所端抬起,铲刀、松土器同时下移推土机整机抬起等三种静态试验工况,对推土机台车架进行了静态试验,并将实验结果与有限元计算结果进行了比较,验证了力学模型及有限元分析结果的正确性,为台车架的设计提供了一定的理论依据。
The azimuths of the central principal axes of the dangerous sections on the frame of bulldozer are determined . the inertia moments to the central principal axes of the dangerous sections on the frame are calculated . this paper also determines the positions of the dangerous points and calculates the stress values of dangerous points on the dangerous sections 分析了推土机台车架在最危险工况下的受力状况,确定了台车架危险截面的形心主轴的方位、计算了台车架危险截面对形心主轴的惯性矩、确定了危险点的位置、计算了危险面上危险点的应力值。