机载液冷流量分配管抗压性能分析及结构优化

Compressive Property Analysis and Structure Optimization of Airborne Flow Distribution Pipe for Liquid Cooling

针对某机载液冷流量分配管极限抗压性能,本文以分配管结构为研究对象,建立分配管在承受内压1.5MPa载荷作用下的参数化有限元模型,应用HyperWorks OptiStruct软件对分配管的静力学特性进行了仿真分析,识别出分配管的管壁厚度和安装工艺显著影响其所受最大vonMises应力。为满足分配管的抗压性能设计要求,以其所受最大vonMises应力为优化目标,综合考虑其质量变化,采用逐次逼近法,计算结果表明增加管壁厚度和采用柔性螺套,优化后结构可以满足分配管的抗压性能设计要求。

Aiming at the ultimate compressive property of an airborne flow distribution pipe for liquid cooling, this paper establishs a parametric finite element modal of the distribution pipe under 1.5 MPa pressure load to study its physical design. By using HyperWorks OptiStruct software, its statics characteristic is simulated to indentify that the wall thickness of the distribution pipe and its installation technology have a significant impact on the vonMises max stress applied on the pipe. Therefore, taking the quality of the distribution pipe into consideration, the vonMises max stress is used as objective function, and it is found that the stress is reduced by rising the wall thickness of the pipe and flexible wire thread insert by successive approximation method. By taking some measures, the compressive property of optimized distribution pipe meets the design requirement.