摘要
为研究新一代运载火箭在垂直转运过程中所受地面风载荷的影响问题,采用时域法对运载火箭地面风载荷响应特性进行了分析。编制了基于谐波叠加法的地面风载荷时程样本模拟程序,并通过与目标功率谱函数的对比来验证程序的正确性。在建立火箭有限元分析模型的基础上,对火箭在不同参考风速下的动力响应进行了计算分析。分析结果表明:编制的基于谐波叠加法matlab程序能很好的模拟脉动风载荷,火箭风载荷动力响应随参考风速的增加而增大。
In order to analyze the ground wind acting on the new generation of launch vehicle when the launch vehicle is in a vertical state,the time-domain method is used.The program for wind histories modeling is given based on the harmony superposition method.The reliability of the program is proved by comparing with the objective power spectrum density.The finite element analysis modal of the launch vehicle is built and the launch vehicle’s structural dynamic response is calculated under different ground wind speed.The results indicated that the matlab program based on the harmony superposition method can accurately simulate the wind histories and the launch vehicle＇s response increases with the increase of ground wind speed.
出处
《强度与环境》
2013年第4期22-26,共5页
Structure & Environment Engineering
基金
中国博士后科学基金(2011M501479)
关键词
运载火箭
地面风载荷
谐波叠加法
结构动力响应
launch vehicle
ground wind load
harmony superposition method
structural dynamics
作者简介
杨虎军（1974-），男，博士研究生，研究方向：火箭总体设计：（710072）西北工业大学航空楼C501．
