谐波合成法在动力荷载模拟中的应用  

Dynamic loads simulation by superposition of harmonic

作　　者：张京穗[1] 刘章军[1] 

机构地区：[1]三峡大学土木水电学院,湖北宜昌443002

出　　处：《四川建筑科学研究》2007年第4期52-54,共3页Sichuan Building Science

摘　　要：详细介绍了利用谐波合成法模拟随机过程的思路。根据模拟点数的不同,将谐波合成法分为单点模型和考虑相关性的多点模型,以桥面不平度和桥面纵向脉动风速的模拟为例,说明了谐波合成法在工程中的应用。通过对模拟结果的功率谱与目标功率谱密度的比较,验证了谐波合成法的可靠性和准确性。The basic theory of random processes simulation by superposition of harmonic is introduced in the paper. According to the simulation target spectral, the method may be applied to simulate one-dimensional and multivariate stochastic process. The random field of road surface and the stochastic wind velocity field on long-span bridges have been simulated based on superposition of harmonic. Some numerical examples demonstrated that deviations between the simulated power spectral density function and the target are sufficiently small and that the method is effective and reliable.

关 键 词：谐波合成法 动力荷载 桥面不平度 脉动风速 

分 类 号：TU973[建筑科学—结构工程]