摘要
机器的机械振动在音频范围内大多是具有明显随机性的随机过程 ,单纯通过有限元、边界元等传统的数值方法不能计算这类具有随机边界条件的结构声辐射问题。本文提出将体积源边界点法和统计方法相结合的统计体积源边界点法 ,导出了求解随机振动物体辐射声场的计算公式。通过求解随机声场算例的计算 。
Most mechanical vibration of machines is a random process. The traditional numerical methods such as finite element method (FEM), boundary element method(BEM) etc. can not deal with the problem of the structure-borned acoustic radiation with random boundary condition. In this paper, a statistical volume source boundary point(SVSBP) method is developed, which combines the statistical method with the volume source boundary point(VSBP) method. A solution of acoustical field radiated by random vibrating body is obtained. By sample problems of the random acoustic field, it is demonstrated that the method introduced in the paper is valid.
出处
《振动工程学报》
EI
CSCD
北大核心
2001年第4期392-397,共6页
Journal of Vibration Engineering
基金
国家自然科学基金 (编号 :5 95 75 0 17)
机械工业技术发展基金 (编号 :97JA0 10 4)
关键词
随机振动
边界积分方程
声辐射
统计体积源边界点法
机械结构
random vibration
boundary integral equation
acoustic radiation problem
volume source boundary point method
statistical method
