| Since the back-loading compression garbage truck can compress the fluffy garbage to increase the loading capacity of the garbage truck,and its sealing property is better,and the secondary pollution caused by the garbage can be better reduced,so that it has been widely used in treating urban waste.Compression garbage trucks and even the environment and sanitation equipment market will maintain a rapid growth of more than 20% in the next five years.Therefore,it is very important to improve the reliability of the compression garbage truck and increase the garbage loading capacity.Among municipal solid waste,domestic waste accounts for the majority.Due to the complex composition of municipal solid waste,which is usually porous and unsaturated,it has a great impact on the engineering properties of domestic waste,and its mechanical properties are very complicated and uncertain.In order to improve the reliability and performance of the compression garbage truck,the garbage compression process and the garbage compression device must be fully analyzed and tested.However,due to the uncertainty of the mechanical properties of the garbage,the simulation of the garbage compression process and the garbage compression vehicle device is limited.When studying the structure of the compression garbage truck,the relevant researchers directly determined the load distribution form through the load hypothesis and did not conduct in-depth research on the garbage compression mechanism,so there is a certain gap between the actual and the theoretical pressure distribution of the structure of the garbage.Therefore,it is necessary to obtain the actual mechanical properties of the municipal solid waste,so as to provide a basis for the design techniques of the compression garbage truck and other garbage disposal products.In this paper,the Duncan-Chang model,which is widely used in soil mechanics as a nonlinear elastic model,is used as the constitutive model of garbage.The constitutive model parameters were obtained by the direct shear test and the confined compression test.The secondary development was carried out on the ANSYS platform,and the plane simulation of the garbage compression process was tried.The elements distorted seriously because the deformation of the garbage at the initial stage of compression is very large,and then the calculation can't continue.By analyzing the mechanical properties of the garbage and summarizing the dangerous working conditions of the garbage truck,the dangerous working condition is determined,which is the maximum load of the garbage compression mechanism and the working condition of the garbage compaction.The elastic material model is used as the constitutive model of the garbage,which simplified simulation of the garbage compression greatly.The pressure distribution of the garbage on the structure is obtained through the simulation of garbage compression,which provides the basis for the analysis of the structure of the garbage truck.Based on the pressure distribution,the static analysis of the structure of the garbage truck is carried out,and the stress distribution of the push plate,the box,the scraper and the slide plate are obtained.According to the analysis results,the structure is improved,the maximum stress is reduced,and the structure of the garbage truck is optimized,which reduces the self-weight of the garbage truck.This paper analyzes the factors affecting the compaction degree and the flow of garbage,and puts forward the measures to increase the load of garbage by adjusting the scraper,the angle and shape of the skateboard,and the cylinder pressure limit of the scraper skateboard. |
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