论文部分内容阅读
充型过程数值模拟有助于了解型腔内金属液的流动形态。SOLA法是目前求解速度场和压力场最流行的方法之一,但SOLA法在求解速度场和压力场的过程中,需在动量方程和连续性方程之间进行反复迭代,计算效率低。本文采用近似因子分解法进行速度场和压力场的计算,根据挤压铸造的特点,考虑冲头的运动,建立基于有限差分法的流动场数值模拟程序,从而实现了对挤压铸造充型过程的数值模拟。为验证程序的正确性,对纯铝实验件挤压铸造充型过程进行了模拟计算,模拟结果与中国兵器科学研究院宁波分院齐丕骧研究员关于冲头速度控制的论述一致。
Filling process numerical simulation helps to understand the flow pattern of liquid metal in the cavity. The SOLA method is one of the most popular methods to solve the velocity and pressure fields at present. However, the SOLA method needs iterative iteration between the momentum equation and the continuity equation in solving the velocity field and the pressure field, so the calculation efficiency is low. In this paper, the approximate factorization method is used to calculate the velocity field and the pressure field. According to the characteristics of squeeze casting, considering the movement of the punch, a flow field numerical simulation program based on the finite difference method is established, Numerical simulation. In order to validate the correctness of the program, the simulation calculation of squeeze casting filling process of pure aluminum experimental parts was carried out. The simulation results are consistent with the discussion about punch speed control by researcher Qi Pizhou of Ningbo Branch of Chinese Academy of Weaponry.