摘要
将地面风作用下的火箭作为一个非均质变截面梁，研究了非轴对称火箭的任意风向风振载荷识别问题。根据结构风振的特性，引入等效阻力系数和升力系数，利用风载荷作用下火箭的振动加速度或弯矩响应识别等效阻力和升力系数以及归一化随机载荷的功率谱。给出了等效阻力和升力系数与以往风载试验中使用的非定常阻力和升力弯矩系数的关系。
Regarded the launch vehicle in ground-winds as a non-uniform beam, the prob1em of identi-fying the wind-induced vibration loads for a non-axisymmetric launch vehicle in ground-winds with any di-r ection is investigated. According to the properties of wind -induced structural vibration, the equivalentdrag coefficient and lift coefficient for winduinduced loads are introduced. The equivalent drag coefficientand lift coefficient are identified using the acceleration or bending responses to wind -induced vibration of launch vehicle, and as well as the power spectral density functions of random loads with normalization.The relations between the equivalent drag or lift coefficients and the nonsteady drag or lift bending coeffi-cients which have be used in former wind loading tests are given.
出处
《强度与环境》
1998年第4期1-7,共7页
Structure & Environment Engineering
关键词
运载火箭
地面风
风载荷
结构振动
参数识别
Launch vehicle, Groundwind, Wind load, Struetural vibration, Parameter identification
