Abstract Bolted connection is an important connection form between composite laminate plate and metal frame structure. The type and location of the connection bolts are of great influence on the structural strength, stiffness and structural vibro-acoustic properties. To achieve the goal of reduction vibration and noise, the bolted connection form optimization of the panel structure is investigated. Bolts stiffness parameter (bolt diameter, etc) and the distribution location are defined as design variables, the bolted connection form optimization function which aim to minimize of acoustic radiation power is established. The composite-to-aluminium panel structure under harmonic excitation for example, the numerical analysis of bolted connection form optimization is implemented. The results show that the acoustic radiation power level and total level of the panel structure are significantly decreased. In the end, the numerical analysis results are verified by model experiment, which validated the feasibility and effectiveness of the proposed method. The results in present work provides more understanding the design and application of the composite-to-aluminium panel structure with bolted connection.

中文翻译：

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基于振动声学控制的复合铝结构螺栓连接优化：数值模拟与实验

摘要 螺栓连接是复合层压板与金属框架结构的重要连接形式。连接螺栓的类型和位置对结构强度、刚度和结构振动声学性能影响很大。为达到减振降噪的目的，对板结构的螺栓连接形式优化进行了研究。将螺栓刚度参数（螺栓直径等）和分布位置定义为设计变量，建立了以声辐射功率最小为目标的螺栓连接形式优化函数。以谐波激励下的复合铝板结构为例，进行了螺栓连接形式优化的数值分析。结果表明，面板结构的声辐射功率水平和总水平显着降低。最后通过模型试验对数值分析结果进行验证，验证了所提方法的可行性和有效性。目前工作中的结果提供了对螺栓连接的复合铝板结构的设计和应用的更多理解。