A Dynamic Loading Method of Spatiotemporal Distribution Domain Load

Abstract

The invention discloses a dynamic loading method of space-time distribution domain load based on MSC.Patran, adopts the creation of pressure and time field functions, and uses the transient response module to generate the original file in bdf format; retrieves the input sentence of time-historic load from the original file ; Compile the load discrete data into a replacement file in bdf format by programming; replace the input statement of the calendar load with the content of the replacement file to output the calculation file; input the calculation file into nastran for calculation to obtain dynamic analysis data. Adopting the technical scheme of the present invention to modify and replace the bdf file through programming to realize loading the corresponding time calendar load format, eliminating the secondary development of the automatic loading process in MSC.Patran, not only greatly improving the calculation efficiency, but also reducing the need for The performance requirements of the computer.

Description

technical field [0001] The invention relates to the field of steel structure engineering, in particular to a method for dynamic loading of time-space distribution domain loads Background technique [0002] Static analysis is the most frequently used method by engineering structure designers, and it is mainly used to solve the static load of the structure that has nothing to do with time or the effect of time can be ignored. In the field of steel structure engineering, there are many problems that change with time and need to be solved by means of dynamic analysis. With the development of computer technology, the dynamic response technology of calculating the complex structure by means of finite element transient analysis has appeared. MSC.Patran / Nastran is a well-known parallel frame-type finite element pre-processing and analysis simulation software in the industrial field. [0003] For ship steel structures, the existing real ship test method is to sail the real ship to ...

AI Technical Summary

Problems solved by technology

Since the wave pressure of each grid on the wet surface of the hull is different at any time, it is a series of discrete values ​​distributed with space and time, which cannot be defined by explicit functions, and the finite element software cannot quickly and effectively dynamically load discrete loads

For calculation conditions with a large scale of spatiotemporal distributed load values, the existing conventional practice requires secondary development based on the PCL programming language (Patran Command Language) in MSC.Patran to realize automatic loading of discrete load values, but this method is inefficient , for a model with a large amount of data, the performance requirements of the computer are very high

[0004] Therefore, in order to realize the dynamic calculation based on the space-time distribution domain in the field of steel structure engineering, it is necessary to solve the problem of poor dynamic loading efficiency and slow loading speed of discrete loads in finite element software

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