大型船舶机械噪声数值计算的液舱模拟方法

Tank modeling method for calculating mechanical noise of large ships

基于声固耦合原理,提出适用于大型船舶机械噪声计算的液舱模拟方法。首先建立典型三舱段模型,分析不同的液舱模拟方法对机械噪声仿真计算的影响,并提出液舱杂交模拟方法。以三舱段模型和某实船舱段模型为例,验证液舱杂交模拟方法的有效性。最后,基于液舱杂交模拟方法,开展某船主机激励下的机械噪声预报。研究表明,液舱杂交模拟方法能够兼顾计算效率和计算精度,满足工程预报要求,可为大型船舶机械噪声数值计算提供参考。

Based on the principle of sound-structure coupling, a tank modeling method suitable for calculation of mechanical noise of large ships is proposed. Firstly, a typical model of three cabin is established, and the influence of different tank modeling methods on the simulation of mechanical noise is analyzed, and a "hybrid modeling method for tanks" is proposed. Secondly, the validity of the hybrid tank modeling method is verified by taking a typical model of three cabin and a real ship’s model as examples. Finally, based on the hybrid tank modeling method, the mechanical noise prediction under the excitation of a certain ship’s main engine is carried out. The research shows that the hybrid tank modeling method can take into account the calculation efficiency and calculation accuracy, meet the requirements of engineering forecast, and can provide a reference for the simulation calculation of mechanical noise of large ships.