汽车离合器从动盘扭转耐久试验中弹簧疲劳断裂的自动识别

对汽车离合器从动盘扭转耐久试验中弹簧断裂的自动识别技术进行研究，提出一种以弹簧刚度特性变化为识别特征的识别原理，进行了相关的分析计算；介绍了基于此原理的自动识别方案及测试过程，并给出实际运行结果。此技术提高了测试智能化水平。     

某车型液压制动软管台架耐久破裂原因分析与解决

文章简要介绍了制动软管台架耐久验证方法,针对台架耐久出现的故障,从仿真分析和台架进行原因确认。针对原因制订了优化方案,同样从仿真分析和台架对优化方案进行效果确认,问题得到了解决。     

振动磨机橡胶衬套的磨损失效分析与研究

简要介绍了振动磨机的特性、用途和工作原理，阐述了振动磨机系统中橡胶衬套的磨损失效理论。结合实例详细论述了橡胶衬套的设计方法。     

文化路立交桥-南北高架桥桥面改造工程

结合桥面改造工程实例,对桥面病害产生的原因进行分析,提出相应的加固维护措施,尤其是浇注式沥青混凝土在桥面铺装改造中的应用。     

重型自卸车车架早期断裂原因的研究

建立了以壳单元为基本单元的某重型自卸车车架有限元分析模型,利用有限元分析软件MSC.Nas-tran对其进行了静态分析、模态分析,并进行了实验测试,测试数据验证了计算的正确性,找出了该车架早期断裂的原因,并给出了对该种车架结构改进的方法。     

Towards a unified methodology for the simulation of rupture in collision and grounding of ships

The aim of the work is the definition of a procedure for the numerical simulation of the response of ship structures under accidental loading conditions, which suffer various different modes of failure, such as tension, bending, tearing and crushing and in particular to investigate the effect of material modeling, i.e. material curve and rupture criterion as well as mesh size and strain rate effect on the results. To this end, different material models and simulation techniques were used for the simulation of eighteen indentation tests conducted by different research groups. The simulations were performed using the explicit finite element code ABAQUS 6.10-2. The tests refer to the quasi-static and dynamic transverse and in-plane loading of various thin walled structures which represent parts of a ship structure. Three rupture criteria are incorporated into VUMAT subroutine, which interacts with the explicit finite element code and refers to an isotropic hardening material that follows the J₂ flow theory assuming plane stress conditions, in order to investigate the prediction and propagation of rupture. The focus is on investigating whether it is possible to define a unified methodology, which is appropriate for the simulation of all different tests. Consistency in the numerical results is observed with the use of an equivalent plastic strain criterion, in which formulation a cutoff value for triaxialities below −1/3 is included.     

A comparative study on the structural integrity of single and double side skin bulk carriers under collision damage

The primary aim of the present study is to investigate the collision resistance and residual strength of single side skin (SSS) and double side skin (DSS) bulk carriers subject to collision damage. The impact dynamics analyses were conducted using ANSYS LS-DYNA for the evaluation resistance forces, energy absorption and penetration depth for various collision scenarios. The struck vessels of Capsize SSS and DSS designs were assumed to be entirely standstill and the striking vessels of an Aframax-type oil tanker with different bulbous bow shapes were modeled as rigid bodies. The findings were compared, where possible, with existing analytical tools. Residual strength calculations on SSS and DSS vessels were computed corresponding to all considered collision damage scenarios. Traditional Smith's method was applied with the average stress — average strain relationships of elements based on derived semi - analytically. The effect of corrosion was also evaluated by Joint Bulker Project (JBP) Rules on the influence of plate and stiffener thickness. The safety of the vessels was determined as a ratio of the ultimate hull girder strength to bending moment in damaged condition. Finally, results and insights derived from the present work are summarized.