摘要
该文针对热力系统中常见的单相分布参数热工对象,建立了分布参数数学模型；在指定的控制微元内,通过对模型的假设和简化以及对系数T,X的常数化,并对该模型进行双拉普拉斯变换,获得了模型的解析解；并以此为基础,构造了单相分布参数热工对象的一种解析一数值混合仿真方法。利用此方法,既可以进行单相分布参数换热系统的动态过程分析,又能够完成此类对象的静态热力特性校核。与其他分布参数模型的处理方法相比较,该文的仿真方法不仅具有较高的运算精度,而且在较大的时间步长下也有非常好的数值稳定性。通过调节步长可以提高计算速度,以满足不同仿真目的的需要。
By utilizing the traditional single -phase distributed parameter methodology of thermal system ,this paper has established a mathematical model. According to the assumptions of the model and simplified representation on the coefficients T,X regarded as constant, the analytic solution of this model has been gotten by implementing the double Laplace transformation on it. Based on such a process, this paper has constructively utilized an analytical - numerical simulation method on these sorts of models. The application of this hybrid simulation method can meet the needs of the dynamical analyzing on a single - phase distributed parameter thermal system as well as verifying the static thermal characteristics of this plant. In comparison with other distributed parameter models, the calculation result of this model has showed that it has a quality of higher precision with numerical stability even at a big time step size. This method can also accelerate the computing process by adjusting the time step size for different simulation purpose.
出处
《计算机仿真》
CSCD
2006年第1期81-84,共4页
Computer Simulation
关键词
分布参数系统
换热器
混合仿真
热工对象
Distributed parameter system
Heat - exchanger
Hybrid simulation
Thermal system
