【摘要】 统计能量法已广泛用于解决高频振动与噪声问题,耦合损耗因子是其关键参数之一。研究基于统计能量法、有限元法和功率输入法,提出一种钢铝连接耦合损耗因子数值计算方法,并运用MATLAB编写了计算软件。通过对含过渡接头的T型连接结构进行数值和实验研究,验证了该法的可靠性。这对提高钢铝混合结构的噪声预报精度及指导其结构声学设计具有重要意义。更多还原

【Abstract】 Statistical energy analysis( SEA) becomes a useful technique for providing a solution to high frequency noise and vibration. Coupling loss factor( CLF) is one of important parameters of SEA. Based on SEA,finite element analysis( FEA) and power injection method,a numerical calculation method of CLF for a steel-aluminum junction and a simulation program with MATLAB were proposed here. A T-shaped plate structure connected by a steel-aluminum transition junction was investigated with numerical simulation and tests. The results verified the reliability of the proposed method,and they provided a reference for improving the accuracy of noise prediction of steel-aluminum jnctions and their structural and acoustic design.更多还原