【摘要】 为进一步实现船舶绿色化和结构轻量化，根据泊松比力学关系式，在内六角型负泊松比结构基础上，在SolidWorks中通过中间内角的倒角操作，建立内凹型负泊松比结构。采用有限元法和压缩实验对泊松比和静载刚度进行分析，采用振动实验对内凹型和内六角结构进行隔振性能对比分析。分析结果表明，相比于内六角结构，内凹型结构的静载刚度提升5.52%，在低于50 Hz的频域中内凹型结构具有更高的加速度振级落差和更低的力传递系数。同时，通过模态分析阐明内凹型结构由于共振而发生的隔振弱化原因。更多还原

【Abstract】 To further advance environmentally sustainable ship design and lightweight structures, a concave structure with negative Poisson’s ratio was established in SolidWorks. This innovative structure was achieved by chamfering the middle inner corner, building upon an inner hexagonal negative Poisson’s ratio framework in accordance with the mechanical relationship defined by Poisson’s ratio. The analysis employed the finite element method and compression experiments to explore Poisson’s ratio and static stiffness. Additionally, vibration experiments were conducted to compare and analyze the vibration isolation performance of both concave and hexagonal structures. The findings reveal that, in comparison to the hexagonal structure, the static stiffness of the concave structure increases by 5.52 %. In the frequency domain below 50 Hz, the concave structure exhibits a higher level of acceleration drop and a lower force transfer coefficient. Concurrently, modal analysis was utilized to elucidate the reasons of the diminished vibration isolation due to the resonance in concave structures.更多还原