不压井井口装置的结构优化设计

采用拓扑优化和尺寸优化对不压井装置进行结构优化设计。首先利用基于变密度法的拓扑优化,以柔度最小为优化目标,体积分数作为约束条件,得到设计空间内最优的材料分布路径。然后根据得到的拓扑结构重新设计不压井装置结构。利用最终得到的不压井装置的拓扑结构建立新的有限元模型,利用尺寸优化工具,以最小质量为优化目标,最大位移与最大应力为约束条件,实现不压井装置的减重。通过综合两种优化方法,不仅提高了不压井装置的性能,而且大大降低了不压井装置的质量,为工程结构提供了一种新设计思路。

Structure Optimization Design for Snubbing Unit

The topology optimization and size optimization were adopted for snubbing unit design.First of all,by using topology optimization which based on variable density,the most optimal material distribution path in the design space was obtained,which aimed for the minimum compliance and constrained by volume fraction.As a result,snubbing unit can be redesigned by the topology optimization result.Meanwhile, new finite element model was established on the topology optimization of snubbing unit,and with the tool of size optimization,snubbing unit got weight loss,which aimed for minimum mass and constrained by maximum displacement and maximum stress.Taking use of these two optimization methods,the performance of snubbing unit is improved and the mass of snubbing unit is reduced,which provide a new design method for engineering construction.