南昌航空大学学报（自然科学版）
南昌航空大學學報（自然科學版）
남창항공대학학보（자연과학판）
Journal of Nanchang Hangkong University(Natural Sciences)
2015年
3期
7-12
,共6页
薄板结构%振动功率流%有限元法%数值分析
薄闆結構%振動功率流%有限元法%數值分析
박판결구%진동공솔류%유한원법%수치분석
thin plates%vibration power flow%finite element method%numerical analysis
对不同边界条件下的薄板结构的振动功率流特性进行了分析研究. 基于结构声强结合薄板有限元模型,推导了薄板结构从时域变换到频域内的振动功率流公式;接着采用经典板理论结合有限元法获得薄板结构的振动功率流,同时得到了薄板结构的功率流-频率曲线图以及功率流矢量场分布图. 由数值分析结果可知:功率流矢量场分布图能反映振源的位置以及振动能量的数值与分布特性,结构各阶的固有频率与振动功率流的峰值处的频率一一对应.
對不同邊界條件下的薄闆結構的振動功率流特性進行瞭分析研究. 基于結構聲彊結閤薄闆有限元模型,推導瞭薄闆結構從時域變換到頻域內的振動功率流公式;接著採用經典闆理論結閤有限元法穫得薄闆結構的振動功率流,同時得到瞭薄闆結構的功率流-頻率麯線圖以及功率流矢量場分佈圖. 由數值分析結果可知:功率流矢量場分佈圖能反映振源的位置以及振動能量的數值與分佈特性,結構各階的固有頻率與振動功率流的峰值處的頻率一一對應.
대불동변계조건하적박판결구적진동공솔류특성진행료분석연구. 기우결구성강결합박판유한원모형,추도료박판결구종시역변환도빈역내적진동공솔류공식;접착채용경전판이론결합유한원법획득박판결구적진동공솔류,동시득도료박판결구적공솔류-빈솔곡선도이급공솔류시량장분포도. 유수치분석결과가지:공솔류시량장분포도능반영진원적위치이급진동능량적수치여분포특성,결구각계적고유빈솔여진동공솔류적봉치처적빈솔일일대응.
The vibration power flow characteristics of the thin plate structures under different boundary conditions are studied in this paper. The vibration power flow equation of thin plate structure, which is from time domain to frequency domain, can be obtained based on the concept of structural intensity and the finite element model of thin plate structure. Moreover, the vibration power flow of thin plate structure is obtained by using the classical plate theory combined with the finite element method, and the corresponding power flow frequency curve and power flow vector field distribution are also analyzed. According to the numerical analysis results, the position of vibration source and distribution character of vibration energy can be known by power flow vector field distribution, and the each natural frequency of structure are correspond to the frequency of the peak of vibration power flow of the frequency.
