Research On Key Technologies Of Certain Large Fatigue Testing Platform

Wire rope is widely used in various devices for its irreplaceable characteristics,such as high strength,low noise and high overload capacity.Performance of wire ropes is directly relevant to the safety of people’s life and belongings,even national defense security,and their life time has correlation with economic efficiency.So it is required for people to be familiar with property of wire ropes,especially those in special use.In this thesis,working scene of a kind of special-purpose wire rope is created and control of its every experimental condition is implemented.So the purpose of studying the technical parameters of the wire rope in specific condition is achieved,providing experimental basis for technical support for selecting merit wire ropes in this situation.The main work in this thesis is as follows:At first,the overall approach for the test bed is determined according to the analysis of the actual working condition.For each part of the test bed,theory analysis and structure design is carried out in detail and model analysis is performed.These works contribute to the accomplishment of the test bed design which meets the working conditions.For the key driving connector,math model is built,and on the basis,life of the joint structure and sliding block is optimized by MATLAB software.Secondly,by analyzing the required motor process of the test bed,the hydraulic system is designed,including hydraulic circuits design,selection of hydraulic components,performance checking of hydraulic circuits.What’s more,the hydraulic system is simulated by AMESim,and the influence of the hose on the stability of hydraulic system is analyzed.At last,for the difference of initial and actual value of the stiff resistance coefficient,prior research is summarized and the insufficient analyzed.A new stiff resistance coefficient formula in accordance with the wire rope in the test is put forward and its correctness is verified.The work provides references for the research of the wire rope in this direction.