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针对导弹无依托发射的场坪承载力分析及选取问题,研究了基于高速公路服务区宽展水泥场坪的无依托发射阵地的可行性。为分析各因素对服务区场坪混凝土路面荷载应力的影响,基于发射车对地荷载特性,建立了三维有限元模型,通过对模型几何尺寸、边界条件和网格密度等进行系统分析,明确了阵地承载力各敏感参数对路面结构响应的影响规律。分析结果表明:刚性面板厚度对板底弯拉应力影响较为显著,板底弯拉应力随着面板模量的增大而增大,随基层顶面当量回弹模量的增大而减小,研究结论为选取和拓展导弹无依托发射阵地提供了技术支持。
Aiming at the analysis and selection of bearing capacity of ground-based missiles without launch, this paper studies the feasibility of firing-free launch site based on wide-spread cement field in service area of expressway. In order to analyze the influence of various factors on the load stress of the pavement concrete pavement in the service area, a three-dimensional finite element model was established based on the load-carrying characteristics of launch vehicle to ground. Through the systematic analysis of the model geometry, boundary conditions and grid density, Influence of Sensitive Parameters of Bearing Capacity on Pavement Structure Response. The results show that the thickness of rigid panel has a significant influence on the bending and bending stress at the bottom. The bending stress at the bottom increases with the increase of panel modulus, decreases with the increase of equivalent modulus of elasticity at the top surface of the foundation, The conclusions of the study provide technical support for the selection and expansion of missile-free launch positions.