汽车结构的轻量化设计措施分析

汽车工业要发展,在目前必须要满足环保要求,汽车轻量化设计可实现节能减排,但轻量化设计不是单纯减重,而是要保证安全性能的前提下去减重,因而如何进行轻量化设计值得探索,本文中重点对此进行了分析讨论,探析了目前市面上主流的轻量化设计方法措施,仅供参考。     

城市轨道交通单线连续U梁设计

以济南市轨道交通1号线工程为依托,对城市轨道交通单线连续U梁进行精细化设计.单线连续U梁为国内轨道交通项目的首次应用,采用三跨连续结构,主跨45 m,主桥全宽仅5.6 m,最小曲线半径795 m,设计难度较大.设计方案将连续结构体系与标准U型梁相结合,在标准U型梁断面的基础上对支点断面进行改造,使单线连续U梁外形与1号...     

Review of the uncertainties associated to hull girder hydroelastic response and wave load predictions

This paper reviews the importance of uncertainties in hull girder loads influenced by flexible fluid structure interactions. The focus is on developments in the field of hydroelastic modelling, simulation and model tests of practical relevance to the prediction hull girder wave load predictions and their validation. It is concluded that whereas hydroelastic methods for use in design development and assessment become increasingly useful, challenges in realizing and modelling uncertainties can be attributed to: (1) the limitations of numerical methods to suitably model nonlinearities; (2) the ambiguity of model tests; and (3) the systematic use of data emerging from computational, model- or full-scale methods. An approach is recommended to assess the uncertainty in the hydroelastic responses to wave loading and an example is provided to demonstrate the application of the procedure.