基于ansys的先张法张拉台座结构优化研究

STRUCTURAL OPTIMIZATION ANALYSIS OF PRETENSION BENCH BASED ON ANSYS

张拉台座是先张法预应力梁施加预应力的主要设备,在梁的制作过程中,承担全部张拉力,因此合理地设计施工可以保障台座拥有足够的强度和刚度。本文以实际工程为例对先张法台座设计与施工的主要技术做了相应的介绍,确定墩柱式台座的受力结构形式。基于ansys有限元仿真软件,采用DM模块进行参数化台座建模,以台座最大主拉应力最小为优化目标,计算结果采用响应面法拟合为二次多项式,对优化前后台座的力学性能进行分析与比较。优化后台座体积减小11.3%,变形量减少29.9%,最大主应力减少9.03%,既保证了台座足够的强度,也进一步确定拓扑优化的可行性,为实际工程结构设计提供参考。

The tensioning platform is the main equipment to apply prestress to the pre-tensioned beam.In the process of making the beam,it bears all the tension forces.Therefore,reasonable design and construction can ensure that the platform has sufficient strength and stiffness.This paper takes the practical project as an example to make a corresponding introduction to the main techniques of the design and construction of the pre-tensioning platform,and determines that the pier type platform is the form of the stressed structure.Based on ANSYS finite element simulation software,DM module was used for parametric pedestal modeling.The maximum principal tensile stress of the pedestal was taken as the optimization objective.The calculation results were fitted as quadratic polynomial by response surface method,and the mechanical properties of the pedestal before and after optimization were analyzed and compared.After the optimization,the volume of the pedestal is reduced by 11.3%,the deformation is reduced by 29.9%,and the maximum principal stress is reduced by 9.03%,which not only ensures the sufficient strength of the pedestal,but also further determines the feasibility of topology optimization,providing reference for the actual structural design of the project.