高强度卡具的优化设计及仿真分析

Optimization Design and Simulation Analysis of High Strength Fixture

对现存卡具存在的弊端进行剖析,通过总结实际问题,采用正向设计方法设计一种高强度抗震防脱落卡具,并通过三维有限元分析软件对两款宽度不同的卡具进行风洞仿真与抗震性能预测。由风洞仿真结果可知,当卡具受到60 m/s活塞风最大荷载作用时,各卡具整体顺风向位移量均较小,几乎不发生形变。由抗震分析结果可知,八九度地震烈度下各卡具的最大等效应力均较小,远低于尼龙材料的屈服极限强度,且形变量极小,可忽略不计。因此得出结论:高强度抗震防脱落卡具能抵抗60 m/s的活塞风作用以及8度地震烈度以上的振动,稳定性较好。

The disadvantages of existing fixtures are analyzed.By summarizing the practical problems,a high strength antiseismic and anti-falling fixture is designed by using forward design method,and the wind tunnel simulation and anti-seismic performance prediction of two fixtures with different widths are carried out through three-dimensional finite element analysis.According to the wind tunnel simulation results,when the clamp is subjected to the maximum piston wind load of 60 m/s,the overall downwind displacement of each clamp is small,and almost no deformation occurs.According to the results of seismic analysis,the maximum equivalent stress of each clamping tool under the earthquake intensity of M8 and M9 is small,which is far lower than the yield ultimate strength of nylon material,and the shape variable is very small and can be ignored.According to the results of seismic analysis,the maximum equivalent stress of each fixture under the earthquake intensity of MS 8 and MS 9 is small,far lower than the yield strength of nylon material,and the deformation is very small,which can be ignored.Therefore,the high strength and anti-falling anti-seismic clamp can resist the piston wind action of 60 m/s and the vibration of magnitude 8 earthquake intensity above,and the stability is better.