Coronal mass ejections (CMEs) are the major drivers of space weather, and an accurate modeling of their initialization and propagation up to 1 au and beyond is an important issue for space weather research and forecasts. In this research, we use the newly developed three-dimensional (3D) flux-rope CME initialization model and 3D IN (interplanetary)-TVD MHD model to study the effect of different CME initial parameters on simulation outputs. The initial CME flux model is established based on the graduated cylindrical shell model. In order to test the influence of the CME initial parameters on the simulation results, we try to run several simulations with different CME initial parameters, then investigate the outputs in interplanetary space. Here, we focus only on cases in which observers are located in the same initial direction of propagation of the CME. Our analysis shows that the parameters specifying the CME initialization in the model, including the initial density, the thickness of CME flux tube, initial mass, and initial magnetic field, have different effects on the simulation results for observers near the Earth and Mars, and on the process of propagation of the CME in interplanetary space. This confirms the important role played by details of the initial implementation of geometric and physical parameters on space weather research and forecasts.

冠状物质抛射（CME）是空间天气的主要驱动力，准确地对其初始化和传播（直至1 au及更高）进行建模是空间天气研究和预报的重要问题。在这项研究中，我们使用新开发的三维（3D）磁通量CME初始化模型和3D IN（行星际）-TVD MHD模型来研究不同CME初始参数对模拟输出的影响。基于有刻度的圆柱壳模型，建立了初始CME通量模型。为了测试CME初始参数对仿真结果的影响，我们尝试使用不同的CME初始参数运行多个仿真，然后研究行星际空间中的输出。这里，我们仅关注观察者位于CME传播的相同初始方向的情况。我们的分析表明，在模型中指定CME初始化的参数，包括初始密度，CME通量管的厚度，初始质量和初始磁场，对地球和火星附近的观测者的模拟结果有不同的影响，并且关于CME在行星际空间中传播的过程。这证实了几何和物理参数的初始实施细节在空间天气研究和预报中所起的重要作用。对于地球和火星附近的观测者的模拟结果，以及对CME在行星际空间中传播的过程，都有不同的影响。这证实了几何和物理参数的初始实施细节在空间天气研究和预报中所起的重要作用。对于地球和火星附近的观测者的模拟结果，以及对CME在行星际空间中传播的过程，都有不同的影响。这证实了几何和物理参数的初始实施细节在空间天气研究和预报中所起的重要作用。