| Crawler crane plays an irreplaceable role in the construction of large-scale construction projects.Its boom system has a complex structure,a variety of combination forms and working conditions.The lifting capacity varies with the data of boom length and working range.When formulating the performance table,the data processing volume is large,it has a certain degree of difficulty and it consumes a lot of time.The efficient formulation method of performance table for crawler crane is studied by using object-oriented programming technology in this article.Quick formulation of performance tables for complex combined arm frame working conditions are realized,the design accuracy and efficiency has been improved.Due to the traditional manual calculation for the simplified model,problems such as poor design accuracy and large workload may be encountered.Therefore,finite element analysis based on visual parameterized real model is used to analyze complex arm frame combination of crawler crane iteratively in this paper.Taking into account the high similarity and correlation between the boom sections of crawler cranes,the visualization and parameterized modeling technique is used in programmatic formulation of performance tables.To achieve the goal of research,this paper presents an efficient parametric modeling method for crawler crane booms,which can achieve accurate and rapid modeling.Based on object-oriented programming technology which is applied to the establishment of nonlinear analysis model for the crawler crane boom,an efficient producing software of performance table for crawler crane is constructed,and a batch of ANSYS command streams were generated by visual programming language.The lifting weight of different kinds of boom combination were iterated under different working conditions,and the maximum allowable loads were screened out to generate the performance table data of crawler crane.The validity of the software has been verified by comparing the existing crawler crane performance tables with the performance tables produced by the software.The software can optimize and improve the existing performance tables of crawler cranes,greatly reduce the labor intensity of the workers,and efficiently realize the formulation of the performance table for new crawler crane.It can make the operation of crawler crane safer and the design efficiency higher.The main work and research results of this paper are as follows:(1)The structural commonality and relevance of crawler crane booms are analyzed.Under the premise of reflecting the authenticity of crawler crane booms,a parameterized model of crawler crane booms based on APDL is established to determine the required parameters for each type of boom sections;(2)A fast modeling system based on object-oriented programming technology is established.Through the automatic assembly of different boom sections,batch generation of the command flow of the non-linear analysis model of the crawler crane boom structure is realized.(3)According to the multiple elevation angles and multiple ranges of different complex arm frame combinations,the lifting load of each attitude is iterated.Based on the results of geometric nonlinear analysis of each iteration,the maximum allowable loads of each complex arm frame combination attitude are found.Finally,the performance table EXCEL file is generated,and it is compared with the existing performance table to verify its effectiveness. |
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