The mechanical characteristics of an aluminum foam winding CFRP composite structure under axial compression.

To enhance the energy absorption properties of the energy-absorbing structure, carbon fiber-reinforced polymer (CFRPs) with higher specific energy absorption and porous material aluminum foam with better compressive characteristics were organically combined, and a lighter aluminum foam winding carbon fiber-reinforced polymer structure (CFRP-FA-FW) was designed. Through quasi-static compression testing, the deformation mode and energy absorption properties of CFRP-FA-FW under axial load were examined. The energy absorption and specific energy absorption of CFRP-FA-FW are both increased by 113.

Sound absorption performance of a conch-imitating cavity structure.

At present, in order to solve noise pollution, many experts are studying methods to improve the noise reduction performance of sound barriers and acoustic devices. However，the development of sound-absorbing structures under external noise environments with multiple frequencies has not made significant progress.To improve the sound absorption performance (SAP) and sound insulation performance (SIP) of structures, a novel cavity-imitating sound-absorbing structure model was established based on the multi-cavity resonance structure of conches.

Forecasting impact injuries of unrestrained occupants in railway vehicle passenger compartments.

Objective: In order to predict the injury parameters of the occupants corresponding to different experimental parameters and to determine impact injury indices conveniently and efficiently, a model forecasting occupant impact injury was established in this work.

Methods: The work was based on finite experimental observation values obtained by numerical simulation. First, the various factors influencing the impact injuries caused by the interaction between unrestrained occupants and the compartment's internal structures were collated and the most vulnerable regions of the occupant's body were analyzed.

Influencing factors and sensitivity analysis of occupant impact injury in passenger compartment.

Objective: The study reported in this article addressed the influence of each factor (impact acceleration, table height h, table to seat distance l₁, interseat distance l₂, table contact stiffness k₁, seat contact stiffness k₂, etc.) on the extent of occupant impact injury in a railway vehicle secondary collision.

Methods: The vehicle's passenger compartment-occupant coupling model was established using proprietary software (MADYMO).