基于流体力学仿真的绝缘子空气动力结构多参数优化设计初探

Preliminary Discussion on Multi Parameter Optimization Design of Insulator Aerodynamic Structure Based on Fluid Dynamics Simulation

为了提高线路绝缘子在重风沙环境下的绝缘性能,最大限度发挥新型空气动力绝缘子的防污特性,基于绝缘子基本结构,提出了4个伞裙结构参数,并针对这些结构参数进行了基于流体场特性的优化设计仿真。4个伞裙结构参数作为优化设计输入参数,上层伞裙下方的矩形截面平均空气流速作为输出参数,分别以上层伞裙2个参数和下层伞裙2个参数各为1个影响因子组合,利用ANSYS Workbench平台进行流体力学计算和响应面优化设计。结合其他设计要求、经验和响应面优化结果,新型空气动力防污绝缘子外形结构的参数建议值可选取:上层伞裙半径L1为190 mm,上层伞裙小伞棱高度H1为8.7 mm,下层伞裙的半径L2为156 mm,下层伞裙在水平方向上的下倾角α为13°。

In this paper, four structure parameters of sheds are defined based on the sample of aero dynamical antifouling insulator, and the fluid field simulations for the parameters optimization are done in order to improve the insulator performance under the environment of windy and dusty, maximize the anti- fouling characteristic of new aerodynamic insulator. The four structure parameters of sheds are set to the input parameters, and the area-weighted average air velocity on the rectangle cut plane under the upper shed is set to the output parameter in the optimization work. The two structure parameters related to upper shed or lower shed are set to one factors group to establish a design project. The fluid dynamics simula- tion and optimization design with response surface method are operated on the software platform of AN- SYS workbench. According to the response surface optimization results and other design experiences, the values of structure parameters of new aero dynamical may be suggested as： the radius of upper shed L1 is 190ram, the height of small rib at the edge of upper shed H1 is 8.Tram, the radius of lower shedL2 is 156ram, the downward inclination angle of lower shed a is 13°