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作者:

Zhang, Lei (Zhang, Lei.) | Gao, Fei (Gao, Fei.) | Liu, Zai (Liu, Zai.) | Cao, Peng (Cao, Peng.) | Zhang, Jinhai (Zhang, Jinhai.)

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摘要:

The first high-performance seismometer on Mars, deployed by InSight, has been working for nearly two Martian years. However, the recorded seismic data are substantially affected by the natural frequencies of the lander. To analyze the effect of the natural frequencies of the lander on specific components of the seismic data, we have built a simplified finite-element model of the lander to conduct modal analyses. Three natural frequencies are modeled by comparing them with those identified from the observed data. These natural frequencies are nonconstant and temperature dependent, which can be explained as an elastic modulus reduction of the solar panels (35% at most) and/or the property changes of the ground media beneath the lander due to a daily air temperature variation of approximately 100 K on Mars. Compared with the previous studies based on the empirical models before the launch, our results can quantitatively evaluate natural modes and their temperature dependency. Thus, these analyses are helpful in avoiding the potential interference of natural frequencies and improving the reliability of seismic data applications. © 2023 Society of Exploration Geophysicists.

关键词:

Solar panels Finite element method Seismic waves Modal analysis Seismic response Natural frequencies

作者机构:

  • [ 1 ] [Zhang, Lei]Chinese Academy of Sciences, Institute of Geology and Geophysics, Engineering Laboratory for Deep Resources Equipment and Technology, Beijing, China
  • [ 2 ] [Zhang, Lei]Chinese Academy of Sciences, Institute of Geology and Geophysics, Key Laboratory of Earth and Planetary Physics, Beijing, China
  • [ 3 ] [Zhang, Lei]Chinese Academy of Sciences, Innovation Academy for Earth Science, Beijing, China
  • [ 4 ] [Gao, Fei]AVIC Xinxiang Aviation Industry (Group) Co., Ltd, Xinxiang, China
  • [ 5 ] [Liu, Zai]Academy of Aerospace Solid Propulsion Technology, Xi'an, China
  • [ 6 ] [Cao, Peng]Beijing University of Technology, Faculty of Architecture, Civil and Transportation Engineering, Beijing, China
  • [ 7 ] [Zhang, Jinhai]Chinese Academy of Sciences, Institute of Geology and Geophysics, Engineering Laboratory for Deep Resources Equipment and Technology, Beijing, China
  • [ 8 ] [Zhang, Jinhai]Chinese Academy of Sciences, Institute of Geology and Geophysics, Key Laboratory of Earth and Planetary Physics, Beijing, China
  • [ 9 ] [Zhang, Jinhai]Chinese Academy of Sciences, Innovation Academy for Earth Science, Beijing, China

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来源 :

Geophysics

ISSN: 0016-8033

年份: 2023

期: 2

卷: 88

页码: A1-A5

3 . 3 0 0

JCR@2022

ESI学科: GEOSCIENCES;

ESI高被引阀值:14

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