一种改进的PIV互相关算法

本文在对两种传统PIV算法进行深入分析的基础上，融合了它们的优点而发展了一种新的速度提取算法一预估搜索法，并给出了算法的具体实现步骤。人工及真实图像实验均表明该法具有求解速度快、计算精度高的优点。     

PGG隔震器性能试验与分析

本文根据研制的普通钢丝绳鼓型隔震器(简称PGG隔震器)的静力试验，建立了PGG隔震器水平向和垂直向的非线性刚度模型。经冲击台动力试验和理论计算分析，表明PGG隔震器具有优良的爆炸冲击震动隔震性能。     

Lennard-Jones Viscosities in Wide Ranges of Temperature and Density: Fast Calculations Using a Steady–State Periodic Perturbation Method

A method for fast calculation of viscosity from molecular dynamics simulation is revisited. The method consists of using a steady-state periodic perturbation. A methodology to choose the amplitude of the external perturbation, which is one of the major practical issues in the original technique of Gosling et al. [Mol. Phys. 26: 1475 (1973)] is proposed. The amplitude of the perturbation required for fast caculations and the viscosity values for wide ranges of temperature and density of the Lennard-Jones (LJ) model fluid are reported. The viscosity results are in agreement with recent LJ viscosity calculations. Additionally, the simulations demonstrate that the proposed approach is suitable to efficiently generate viscosity data of good quality.     

Structural approach to nanoscience: a case study of complex and cluster formation in ZnBr2–ZnCl2 melts

Although the melt structure of glass-forming ZnCl₂ has so far been well studied, there exists quite little information on the structural change due to anion-substitution. In the present work, the short-range structure of ZnCl₂–ZnBr₂ mixture melts was analyzed systematically by time-of-flight pulsed neutron diffraction techniques, Raman spectroscopy, molecular orbital calculations, and molecular dynamics simulations. According to radial distribution analysis, it was found that there were tetrahedral structural units of ligand-substituted [ZnCl_nBr_4−n]²⁻ (n=0–4) in these melts, not implying the simple mixing of [ZnCl₄]²⁻ and [ZnBr₄]²⁻ units. Further detailed estimation indicated that the ligand-substituted complex anions were linked with each other by sharing a common anion.     

Simulation Study of Aspects of the Classical Hydrogen Atom Interacting with Electromagnetic Radiation: Elliptical Orbits

The present study examines the behavior of a classical charged point particle in near-elliptic orbits about an infinitely massive and oppositely charged nucleus, while acted upon by applied electromagnetic radiation. As recently shown for near-circular orbits, and now extended here to the elliptical case, rather surprising nonlinear dynamical effects are readily produced for this simple system. A broad range of stability-like conditions can be achieved by applying radiation to this classical atom. A perfect balance condition is examined, which requires an infinite number of plane waves representing harmonics of the orbital motion. By applying a scale factor to this radiation, stability-like conditions are produced where periodic variations in semimajor and semiminor axes occur for extended periods of time, before orbital decay eventually takes over due to the effects of radiation reaction. This work is expected to lead to both practical suggestions on experimental ideas involving controlling ionization and stabilization conditions, as well as hopefully aiding in theoretical explorations of stochastic electrodynamics.     

Molecular dynamics studies of atomic-scale tribological characteristics for different sliding systems

A slider-slab sliding model for hard-to-soft and soft-to-soft sliding systems with abrasive and non-abrasive wear conditions is used to investigate atomic-scale friction. The molecular dynamics simulation uses the Morse potential to calculate interatomic forces between atoms. Separation distance between the slider and the slab is changed to simulate repulsive and attractive interactive force fields exerted on interface between two sliding components. Effects of the interaction potential parameters on the sliding friction are investigated. The relationship of frictional force, normal force and temperature rise of the slider and the slab during sliding are established. Comparison of the hard-to-soft and the soft-to-soft sliding system are carried out and shows different tribological phenomena.     

弹射座椅的冲击动力学分析研究

将冲击动力学和有限元分析方法相结合，建立了复杂结构在冲击载荷作用下的分析计算方法。通过对军用飞机弹射座椅所受不同冲击载荷的对比计算，分析了弹射座椅的响应规律和可能的失效形式。通过仿真计算有利于在设计阶段掌握弹射座椅薄弱环节，其方法对同类复杂结构的冲击动力学分析计算具有参考价值。     

高速锯床防护罩抗冲击能力的有限元分析

利用ANSYS/LS_DYNA的动力学分析功能对GS3050型超高速数控锯床安全防护罩的抗冲击能力进行了数值分析,对刀具碎片侵彻有机玻璃的过程进行了数值模拟.结果表明,采用厚度为15 mm的改性丙烯酸脂有机玻璃作为GS3050锯床的安全防护罩是可靠的.数值分析和试验的结果吻合.     

自蔓延高温合成材料中耗散结构及研究意义

在简介自蔓延高温合成技术和耗散结构论的基础上,分析和阐述了自蔓延高温合成材料中的耗散结构,探讨了自蔓延高温合成材料中耗散结构的研究意义。     

《材料力学》课教学初探

本文综合论述了材料力学的课程体系和内在规律,从调动学生学习积极主动性角度出发,对材料力学的绪论讲授、教学思路的确立、类比法的采用、归纳总结及理论联系实际等五个方面进行探讨。