浅谈不同运输方式的土地占斥

首先在分析土地资源十分紧缺现状的基础上提出了交通运输业发展应采用既能够集约利用土地又能够满足经济发展需求的交通运输方式，然后在对五种运输方式占用土地的数量比较分析后，着重分析了铁路和公路对土地占用的功能综合比较。最后提出了在土地资源约束下如何发展各种交通运输方式的一些浅见。     

浅谈不同运输方式的土地占用

首先在分析土地资源十分紧缺现状的基础上提出了交通运输业发展应采用既能够集约利用土地又能够满足经济发展需求的交通运输方式,然后在对五种运输方式占用土地的数量比较分析后,着重分析了铁路和公路对土地占用的功能综合比较。最后提出了在土地资源约束下如何发展各种交通运输方式的一些浅见。     

甬台温高速公路苍南段草田山滑坡综合治理及效果分析

甬台温高速公路苍南段草田山段K79＋310～K79＋550滑坡通过运用抗滑桩＋预应力锚索、预应力锚索、钢筋混凝土格构梁支挡,结合减载、排水、反压等工程措施进行综合治理,并现场监测,取得了较为完整的观测资料,对滑坡处治起到了指导与控制作用,有效保证了工程施工和运营安全,达到了预期效果。     

摩托车噪声源的识别与控制

通过声强测试技术和加速噪声的模拟试验对摩托车的主要噪声源进行了识别研究,结果表明进、排气噪声是摩托车的主要噪声源,并初步确定了进、排气噪声对整车加速噪声的贡献量。利用边界元计算(BEM)技术对空气滤清器和排气消声器的声学性能进行仿真分析和改进设计。新设计的空气滤清器和排气消声器对整车的通过噪声有2.7dB的降噪效果。     

Load effects on vessel-shaped fish cage steel structures,nets and connectors considering the effects of diffraction and radiation waves under irregular waves

Vessel-shaped fish cages are mainly composed of a large floating body, aquaculture nets and a number of steel frames. Due to the large scale of vessel-shaped fish cages, the velocity field induced by the diffraction waves and radiation waves cannot be ignored in the calculation of the loads on the net and steel frames. In turn, the loads can affect the wave-induced response of the floating body and hence the radiation waves as well as the sectional forces. In this paper, a novel method is proposed to consider the coupling effect. First, considering the irregular waves in short-term periods, the global response of the floating body is calculated in the time domain by the state-space method based on potential flow theory. Meanwhile, the velocity field considering the influence of the floating body is built according to the velocity transfer function. Then, the Morison formula is used to calculate the loads on the nets and the steel frames. Finally, the coupling achieved through numerical iterations is considered in the calculation of the twine tension, load effect of connector and the global cross-section under irregular waves. It is found that the diffraction and radiation waves make a significant difference in the twine tension and connector load effect.