舰艇结构的动态特性分析

以各国海军普遍采用的液压平衡式发射系统为研究对象，通过对发射压力固有特性的分析，建立舰艇结构的有限元分析模型。在此基础上，进行模态和瞬态计算与分析，结合发射采用的高压水的性能曲线，探讨影响鱼雷水下发射结构噪声的主要因素，包括舰艇壳体属性、流体属性及发射管壳体属性等，和未来进一步研究的方向。

Dynamic Property Investigation of Naval Ship Structure

Structural vibration and acoustic properties of naval ships are important factors for the vitality and combat effectiveness of the ships. Noise resulted from the vibration source through the structural transfer of the ships is vitally important. To raise the tactics effect of torpedoes and the concealing effect of submarines, the popular hydraulic pressure balanced launching system is studied. A finite element model of a naval ship structure is established and analyzed. The natural property of launching pressure is analyzed. The transient computation is carried out and the vibration modes are obtained. Due to the prop-erty curve of the high-pressure water used as launch power, the influences of major factors, such as the shell property of naval ship and launch tube as well as the property of fluid etc. , on structure noise during undersea weapon＇s launch are probed. Some proposals concerned to the future investigation are also put forward.