摘要
与传统刚性承载相比,柔性可变容腔阵列承载对大型负载有更好的适应性和保护性,为此,通过对大型阵列承载柔性可变容腔调节系统进行设计,计算柔性模块的承载特性,使用LS-DYNA有限元模块对柔性模块在不同压力和载荷下的变形和体积进行仿真,并搭建AMESim模型仿真调压系统面对载荷突变工况的流量和压力变化情况。最后,进行阵列承载三柔性模块调压系统性能测试。结果表明:所设计柔性可变容腔调节系统性能稳定,能满足大承载能力要求,可为柔性承载装备的设计和应用提供参考。
The bearing and transportation of large,heavy-load objects are essential operations in ocean engineering,special equipment deployment,and large-scale structural manufacturing.Conventional rigid load-bearing equipment,such as bridge cranes,tower cranes,and gantry cranes,often has limited adaptability and operational safety.These limitations are particularly evident when handling oversized or irregularly shaped objects with delicate surfaces,or under constrained lifting conditions.Flexible load-bearing systems,owing to their deformability and cushioning properties,can provide improved shape conformity and enhanced protection for the load.However,existing airbag-based flexible bearing solutions generally suffer from low internal pressure,large overall dimensions,limited load capacity,and poor operational safety.This highlights the urgent need to develop a novel flexible load-bearing technology that combines high load capacity,compact size,and reliable performance.This paper presents a large-array flexible variable-volume cavity adjustment system.The system comprises multiple fiber-reinforced composite membrane modules integrated with dedicated control valve assemblies.By configuring the modules in an array and adjusting their internal pressures,the system provides adaptive and stable support for loads of varying shapes and masses.Initially,the load-bearing behavior of individual modules is analyzed.Using the control volume method,the relationship between the module’s control surface and volume change is derived,and a corresponding load-bearing model is built.Subsequently,finite element simulations are conducted in LS-DYNA to investigate module deformation under different combinations of internal pressure and external loading.Quadratic polynomial equations are then fitted to predict maximum radial deformation and cavity volume.Then,these fitting results are employed to construct a system-level simulation model in AMESim,analyzing dynamic flow and pressure responses under sudden load-change scenarios in multi-module configurations,thereby verifying the system’s rapid pressure-adjustment capability even when a single module fails.Finally,a physical prototype consisting of a three-module array is fabricated,and experimental tests are conducted to evaluate both load-bearing performance and pressure regulation under balanced and active pressurization modes.The experimental results demonstrate the proposed system maintains stable pressure control within the range of 0-0.25 MPa,achieving a regulation accuracy better than 0.05 MPa.When supporting a total load of 4 t using three modules,the system is able to rapidly adjust the pressures in the remaining modules after one module is depressurized and removed from load-bearing,thereby preserving overall stability.These findings confirm that the large-array flexible variable-volume cavity adjustment system not only meets high load-capacity requirements but also exhibits excellent adaptability to varying load geometries and high operational reliability.This study integrates theoretical modeling,finite element simulation,and experimental validation to provide a comprehensive evaluation of the system’s performance.The results provide valuable theoretical insights and practical guidance for the design,optimization,and deployment of next-generation flexible load-bearing systems,particularly under conditions involving irregularly shaped heavy loads or operations with stringent safety requirements.Moreover,the multiple methodologies employed in this study can be extended to the design of other flexible,fluid-filled support systems,thereby broadening their applicability in marine engineering,heavy equipment transportation,and structural protection under complex operating conditions.
作者
张前英
张增猛
王宇航
徐伟凌
张康
弓永军
ZHANG Qianying;ZHANG Zengmeng;WANG Yuhang;XU Weiling;ZHANG Kang;GONG Yongjun(Naval Architecture and Ocean Engineering College,Dalian Maritime University,Dalian 116026,China)
出处
《重庆理工大学学报(自然科学)》
北大核心
2025年第8期155-161,共7页
Journal of Chongqing University of Technology:Natural Science
基金
国家重点研发计划课题(2021YFC2802403)
国家自然科学基金项目(52175043,U908228)
大连理工大学精密/特种加工及微制造技术教育部重点实验室(B类)开放课题基金资助项目(B202202)
中央高校基本科研业务费专项资金资助项目(3132023513)。
关键词
柔性承载
可变容腔
有限元仿真
承载能力
flexible bearing
variable volume cavity
finite element simulation
bearing capacity
