Abstract:
To address issues like seedling blockage and damage during the falling and clamping processes in the development of mechanized kelp seedling clamping equipment, this study measured the biomechanical parameters of suitable - period kelp seedlings (Saccharina japonica) to obtain the mechanical parameters and deformation patterns of their stems and leaves under external forces. The structural composition of kelp seedlings was introduced, and their biological characteristics were measured. A texture analyzer and a friction coefficient analyzer were used to measure the mechanical properties of kelp seedlings, and discrete element simulations using EDEM verified the compression characteristics of kelp seedlings. Results showed that the tensile strength of kelp seedling stems ranged from 0.67 to 0.79 MPa, their shear strength from 1.95 to 2.23 MPa, and their compression recovery from 0.43 to 0.46. For kelp seedling leaves, the tensile strength was between 0.52 and 0.71 MPa, the shear strength between 1.12 and 1.74 MPa, and the compression recovery between 0.03 and 0.06. The tensile and shear strengths of kelp stems and leaves decreased with increasing loading speed, while the compressive recovery increased. Among stainless steel, rubber, and silicone, the friction coefficient between kelp seedlings and silicone was the highest when the normal force and loading speed were constant. The error between the simulated and measured radial compression values of kelp seedling leaves using EDEM was 8.2%. These findings offer data and theoretical support for optimizing the design of kelp seedling clamping equipment.
Key words:
kelp seedlings,
clamping of kelp seedlings,
mechanical properties,
simulation analysis
摘要： 针对机械化海带夹苗设备研发中，海带苗落苗与夹苗过程产生的落苗口堵苗、伤苗等问题，通过对适夹期的海带苗（Saccharina japonica）生物力学特性参数测量，获取海带苗柄、叶在外力作用下的力学特性参数和形变规律。介绍了海带苗的结构组成并对其生物特性进行了测量；使用质构仪和摩擦系数仪对海带苗的力学特性进行了测量并利用EDEM对海带苗的压缩特性进行了离散元仿真验证。结果显示，海带苗柄的抗拉强度的范围为0.67~0.79 MPa，抗剪强度的范围为1.95~2.23 MPa，压缩恢复性范围为0.43~0.46；海带苗叶的抗拉强度的范围为0.52~0.71 MPa，抗剪强度的范围为1.12~1.74 MPa，压缩恢复性范围为0.03~0.06，海带苗柄、叶的抗拉强度和抗剪强度随着加载速度的增大而减小，压缩恢复性随着加载速度的增大而增大。海带苗与不锈钢、橡胶、硅胶三种接触材料之间，当正压力与加载速度一定时，海带苗叶与硅胶之间的摩擦系数最大。基于EDEM的海带苗叶的径向压缩仿真值与实测值的误差为8.2%。研究结果可为海带夹苗设备设计优化提供数据和理论支撑。
关键词:
海带苗,
夹苗,
力学特性,
仿真验证
YUAN Xiang1, QIAN Yuxing1, WU Shuqiao1, XUE Qingsong1, LIU Zibo 1, ZHANG Guochen1, 2, 3, MU Gang1, 2, 3, ZHANG Hanbing1, 2, 3. Studying the biomechanical properties of kelp seedlings through simulation and experimentation#br#
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[J]. Fishery Modernization, 2025, 52(3): 33-.
袁翔1, 钱宇星1, 吴树桥1, 薛清松1, 刘子博1, 张国琛1, 2, 3, 母刚1, 2, 3, 张寒冰1, 2, 3. 海带苗生物力学特性试验与仿真研究[J]. 渔业现代化, 2025, 52(3): 33-.