The Development And Optimization Of Design And Computing Platform Of Fixed Jib Of Wheeled Crane Based On The Analytical Method

Fierce market competition of wheeled cranes makes manufacturers must shortendevelopment cycle to improve development efficiency，that Requests higher quality ofcrane designers and practical development tool. The majority of domesticmanufacturers use comprehensive application of finite-element and analytical methodto calculate crane performance. But finite element method needs the higherprofessional designers，analytical method requires a lot of repeated the formulacalculation，cumbersome and complex workload. To solve this practical problem，Xuzhou Heavy Machinery factory and Jilin University Mechanical College cooperateto develop the wheeled crane design computing platforms，this software is based onC/S structure，applicable to the LAN，can become a simple，practical and efficientcomputational tool for Xuzhou heavy machinery technicians.This thesis is the finishing work throughout the development process of theplatform of jib. Summarizes the derivation of the formula，the preparation of theprogram，comparison of finite element results，provides a detailed description of thedevelopment of computing platforms. The main work and research achievement of thepaper are as follows:(1) It summarized the development of wheeled crane industry，summed up thefuture development trends of wheeled crane. It introduced problems of wheeled craneto be solved during the vehicle design phase of the project，made this view of thewheeled crane design computing platforms，and analyzed the significance of the topicand the feasibility of the project.(2) Learn more about structure and working principle of all-terrain wheeledcranes，simplify the finishing round of commonly used combination of wheeled cranejib，make a detailed stress analysis of the jib and derivation of the analytical methodcalculation formulas based on the current the crane design specifications.(3) Unify parameters，using the C++programming language to write the calculation program of the jib. Make an in-depth study on the main-jib couplingcalculation algorithm which to be used to Calculate jib performance，reveal that themain-jib coupling algorithm for the crane design can be more coordinated and easy bycomparing calculations results.(4) Introduced the finite element method，using the APDL language preparationto write parametric calculation program of QAY300wheeled cranes. The calculationresults of the analytical method and the finite element method calculation results werecompared to verify the reasonableness and accuracy of the analytical method formulasand programs.(5) Develop object-oriented visual design computing platforms of the crane. Thesystem uses the C/S architecture，the client achieves basic computing functions，reads the corresponding data based on the permissions setting on the server side. Theserver is responsible for data storage and assignment of permissions. And provide adetailed description of multiple functional modules and the calculation module of theplatform.(6) It summed up works of jib of the platform in the development process，putsforward a number of shortcomings in the current version and the suggestions forimprovement.The platform improves the efficiency of analytical method to calculate for designstaffs. Modify the section and size parameters repeatedly by the experience of thedesigners repeatedly to make a manual optimization of the crane，which can shortenthe product development cycle.