舰船设备振动试验方法的探讨

目的探讨舰船设备振动试验中的几个问题并提出解决方法。方法分析GJB 150.16A,GJB4.7—83和MIL-STD-167-1A等振动试验标准,找出其中存在的缺点。阐述实验室模拟与实际环境的差异,提出改进建议。结果 GJB 150.16A中没有明确说明随机部分和正弦部分是单独试验还是叠加试验,GJB 4.7—83和MIL-STD-167-1A中没有给出随机振动的条件,只有正弦振动部分。结论对于标准中存在的缺点,在每个轴向,首先进行一半的功能试验,再进行随机叠加正弦/随机振动,最后进行另一半功能试验。对于实验室模拟与实际环境存在差异的问题,通过采用力谱控制、采用模拟舰船结构的夹具、规定安装方式、对环境条件进行反复迭代等方法改进。

Discussion on Vibration Test Methods for Shipborne Equipment

Objective To discuss some problems in the vibration test of ship equipment and put forward the corresponding solutions. Methods The vibration test standards GJB 150.16A, GJB 4.7—83 and MIL-STD-167-1A were analyzed, finding out the shortcomings. The difference between the laboratory simulation and the real environment was expounded, and the improvement suggestions were put forward. Results It was not clearly described that the random part and the since part was a separate test or overlay test in GJB 150.16A, while GJB 4.7—83 and MIL-STD-167-1A only gave the since vibration part, not giving the condition of random vibration. Conclusion For the shortcomings of the standards, first half times of the function test for each axes were carried out, and then random superposition of since/random vibration test was carried out, and finally the residual function test was carried out. Forthe difference between the laboratory simulation and the real environment, the improvement was achieved through using force spectrum control, test fixture for simulating ship′s structure, prescribing the provisions of the installation and repeated iterative of environmental conditions and other methods.