Abstract：Warships’ sound radiations under multi-point complex loads are based on their structures’ vibration responses. Here, an exciting motor was installed on a warship’s base plate as a vibration excitation source. This vibration source was connected with the base plate at multiple points through force sensors. Force sensors and accelerometers were used to measure exciting forces inputted from the motor to the warship’s structure and accelerations at installation points, respectively. A program coded with MATLAB and LabVIEW was developed to calculate the warship’s structure vibration responses under multi-point complex excitations considering effects of phase differences among inputs and combining with the vibration transfer function obtained using the FE method. On the other hand, the multi-point excitations and the warship structure vibration responses were also measured in tests. Furthermore, the theoretical solving methods for structure’s vibration responses under multi-point excitations were explored in cases of force type of excitations and acceleration type ones, respectively. The test results verified the correctness of the theoretical calculation ones using the vibration transfer function. It was shown that the theoretical calculation results with force type of excitations agree best with those of tests; factors affecting the accuracy of solving vibration responses under acceleration type of excitations are many, more channels involved in computation do not always cause better results.
谢志勇 周其斗 潘雨村. 多点复杂载荷作用下结构振动仿真与试验研究[J]. 振动与冲击, 2018, 37(11): 166-174.
XIE Zhi-yong, ZHOU Qi-dou, PAN Yu-cun. Simulation and tests for vibration of structures under multi-point complex loads. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(11): 166-174.
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