真空低温绝热支撑的设计与模拟分析

Simulation of Newly-Developed Vacuum Cryogenic Thermal Insulation Suspension Support for Superconducting Accelerator

真空低温绝热支撑(POST)是超导加速器低温恒温器(Cryomodule)的关键部件之一,直接影响到整个Cryomodule的静态漏热、结构的稳定性、加速器准直测量的精确性等多种性能指标。利用经典理论方法和有限元软件对POST进行理论计算和模拟分析,理论计算与模拟分析结果基本一致,同时在工作状态下对其进行热力学模拟计算。分析结果表明,此POST满足低漏热、高强度的设计和使用要求,为进一步的优化设计和实验研究提供了可靠的理论依据和技术支持。

The stress and temperature distributions of the newly-developed vacuum cryogenic thermal insulation sus- pension support （POST）, dedicated to and installed in the superconducting acceleration cryomedule of the Accelerator Driven Sub-critical System （ADS）, was empirically approximated, mathematically modeled, theoretically analyzed in clas- sical mechanics and thermal dynamics, numerically simulated in finite element method with software ANSYS, and experi- mentally tested under the operation conditions. The influence of the POST specifications, including but not limited to the mechanical and thermal properties of materials, structures of the constituent parts, loads and temperature, on the distribu- tions of stress, temperature and stability, was investigated. The simulated results show that the novel POST meets all the stringent thermal and mechanical requirements. The calculated, simulated and tested results were found to be in fairly good agreement.