Based on the principle of smooth filling casting system without gas gap,the casting system of bolster is designed.
基于无气隙平稳充型浇注系统的设计原理,设计了摇枕铸件的浇注系统并进行了充型和凝固过程的计算机模拟。
The developments and progresses of engineering modeling of earthquake ground motion in the past decades are reviewed in this paper,in this part the commonly used stationary models and uniformly modulated processes are discussed.
综述了几十年来地震动工程学模型化研究的发展过程，较全面地分析了目前常用的平稳模型及均匀调制过程。