http://yetl.yabesh.ir/yetl1/handle/yetl/19042 2026-04-25T16:09:13Z 2026-04-25T16:09:13Z Ma, Minjie Wang, Xuewei Li, Yang Wang, Jia http://yetl.yabesh.ir/yetl1/handle/yetl/4310610 2026-02-17T21:46:09Z 2025-01-01T00:00:00Z

Real-Time and High-Precision Acoustic Holographic Field Reconstruction Based on Iterative Unsupervised Learning Ma, Minjie; Wang, Xuewei; Li, Yang; Wang, Jia The ability to shape a specific acoustic field is crucial for a variety of applications, especially in contactless operation, where it shows great advantages. Acoustic holography reconstructs the desired acoustic field by encoding a three-dimensional (3D) acoustic field into a two-dimensional (2D) acoustic hologram. Most conventional acoustic holography, such as 3D-printed acoustic lenses and phased arrays of transducers (PAT), has limitations in terms of dynamics and phase fidelity. To address these issues, in this article, a method is proposed that combines the high-fidelity benefits of acoustic holograms with the dynamic control of phased arrays in the ultrasonic frequency range. An iterative unsupervised learning algorithm is also proposed to compute the desired source phase holograms and move the position of the projected holograms through the phase delay to control the output acoustic waves and obtain the desired acoustic field. Experiments show that the method outperforms previous algorithms in terms of phase fidelity and real-time performance, demonstrating the future potential of acoustic holography in the field of automated noncontact particle manipulation.

2025-01-01T00:00:00Z Shi, Yueqing An, Dongqi Tan, Tiancai Chen, Guohai Yang, Dixiong Li, Rui http://yetl.yabesh.ir/yetl1/handle/yetl/4310601 2026-02-17T21:45:51Z 2025-01-01T00:00:00Z

Free Vibration of Rotationally Restrained Stepped Open Cylindrical Shells: New Analytical Solutions Shi, Yueqing; An, Dongqi; Tan, Tiancai; Chen, Guohai; Yang, Dixiong; Li, Rui The rotationally restrained stepped open cylindrical shells are typical components utilized in the aeronautic, astronautic, and marine fields for their merits in light weight and designated structural enhancement. Nonetheless, few analytical free vibration studies have been reported by reason of the challenges in dealing with the high-order partial differential equations incorporating the complex joining and boundary conditions. In the present work, we make a first successful attempt to solve such issues by developing a novel analytical solution scheme with an integration of the symplectic superposition method and the subdomain division technique. The frequencies are acquired by rigorous derivations without assuming displacement forms. The stepped open cylindrical shells subjected to three rotationally restrained boundaries under two stepped thickness directions are considered to exhibit the versatility of the proposed solution scheme, and all the free vibration solutions show excellent agreement with their counterparts from the literature or the commercial software. Moreover, sufficient parametric analyses on the crucial design variables have been conducted on the basis of the analytical solutions, and the findings may reduce the structural analysis procedure of stepped open cylindrical shells.

2025-01-01T00:00:00Z Ma, Yingqun Zhao, Qingjun Zhao, Wei Luo, Weiwei Yang, Xuesen Ren, Sanqun http://yetl.yabesh.ir/yetl1/handle/yetl/4310457 2026-02-17T21:40:17Z 2025-01-01T00:00:00Z

Analyzing Vibrational Energy Flow in Structures With Bolted Preload Flange Joints Under Harmonic Excitation: Application to Aero-Engine Overall Casing Vibration Attenuation Ma, Yingqun; Zhao, Qingjun; Zhao, Wei; Luo, Weiwei; Yang, Xuesen; Ren, Sanqun

2025-01-01T00:00:00Z He, Zhenxing Zhang, Pengfeng Gong, Zhanlin Ye, Senli Lu, Yangyang Bao, Nengneng Bai, Yanbo http://yetl.yabesh.ir/yetl1/handle/yetl/4310448 2026-02-17T21:39:52Z 2025-01-01T00:00:00Z

Research on Structure Optimization and Damping Performance of the Mesh-Type Elastic Pad for Rail Transport He, Zhenxing; Zhang, Pengfeng; Gong, Zhanlin; Ye, Senli; Lu, Yangyang; Bao, Nengneng; Bai, Yanbo Damping tracks with elastic pads are widely utilized for their excellent vibration reduction capabilities and cost-effectiveness, with the elastic pad being the core component. Due to the low material utilization of the existing under slab mat-type elastic pad (UTEP), the research team proposed a new mesh-type elastic pad (MTEP). This study optimizes the design of the MTEP by introducing grooves at the bottom to address drainage issues, and compares their mechanical properties with the UTEP. The analysis reveals that the maximum stress of the MTEP is significantly lower, and its damping performance is notably superior to that of the UTEP. An MTEP prototype was fabricated and subjected to a drop hammer impact experiment, demonstrating a damping effect exceeding 10 dB. Furthermore, a vehicle–damping track with elastic pad coupled dynamics model was established, and its accuracy was validated using measured data. The model's accuracy was validated against experimental data, and the simulation results indicate that the damping track with the MTEP exhibits superior structural stability, vehicle operational quality, and damping performance compared to the damping track with the UTEP.

2025-01-01T00:00:00Z