本文探討液動壓止推軸承之設計方法及最佳化流程，止推軸承依油墊形狀分為平台型、口袋型及錐型三種類型。將已知條件及設計參數代入特性方程式進行數值運算，求得膜厚高度、摩擦功率、溫升、流量等軸承特性參數。本文規劃出特性參數計算及最佳化特性計算方式，得到軸承特徵數對應設計參數的變化，並比較三種油墊在相同條件下之最佳化結果，以錐型油墊具有高膜厚高度和低摩擦功率為最佳。

This paper investigated the design methods and optimization of the hydrodynamic thrust bearings. The thrust bearings according to the shape of oil pads have three types, which are stepped-land, pocket and tapered-land.For numerical computation, substituting known conditions and design parameters into the characteristic equations can obtain the characteristic parameters of bearings, which are the film thickness height, friction power, temperature, flow etc. In this paper, we planned the characteristic parameters calculation and optimal characteristic parameters calculation to obtain the changes in characteristic parameters of bearing corresponding to the design parameters. And we compare the optimal results for the three types of oil pads in the same conditions. The tapered-land is the best,which has high film thickness height and low friction power.