论文部分内容阅读
鸟与叶片的撞击过程是一个复杂的加载过程。为了将其简化,以建立一个简单且合理的鸟撞击载荷模型,需要分析鸟撞击载荷的各种因素对叶片响应的影响。本文通过计算机数值模拟进行上述工作。以矩形悬臂板模拟实际叶片,以冲击载荷模拟鸟撞击载荷,采用有限元法计算悬臂板在冲击载荷下的非线性瞬态响应。从鸟撞击载荷的冲量、时间因索、空间因素三个方面分析了冲量、加载持续时间、力-时间函数、初始冲击压力、加载位置、载荷的空间分布以及载荷类型等七种因素对叶片响应的影响。本文得出的结论为合理简化鸟撞击加载过程及建立鸟撞击载荷模型提供了参考与依据。
The collision process between birds and blades is a complicated loading process. In order to simplify it in order to establish a simple and reasonable bird impact load model, it is necessary to analyze the influence of various factors of the bird impact load on the blade response. This paper carries out the above work through computer numerical simulation. The rectangular cantilever plate was used to simulate the actual blade, and the impact load was used to simulate the bird impact load. The nonlinear transient response of the cantilever plate under impact load was calculated by the finite element method. Three factors, such as impulse, loading duration, force-time function, initial impact pressure, loading position, spatial distribution of load and load type, were analyzed in terms of impact, time, and space factors. Impact. The conclusions obtained in this paper provide reference and basis for reasonably simplifying the bird impact loading process and establishing the bird impact load model.