Article
Chemistry, Multidisciplinary
Xiong Wang, Wei Liu, Xiao Li, Yi Sun
Summary: The improved method combines FE-SEA and quasi-steady state theory to predict spacecraft structure response during pyrotechnics separation. The shock experiment effectively simulates pyroshock characteristics and helps obtain an accurate shock force function. Experimental and calculated shock response spectra show similar trends and amplitudes, verifying the rationality and accuracy of the novel method.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Aerospace
Xiong Wang, Wei Liu, Jifeng Ding, Yi Sun, Yongbing Dang
Summary: An improved method based on FRF and VMSS is proposed to predict the pyroshock response of a spacecraft structure in a wide frequency domain. The method effectively improves the prediction accuracy of the SEA model in the relatively low-frequency band, while ensuring computational efficiency and obtaining more accurate shock response results in a wide frequency domain.
Article
Engineering, Aerospace
Yuki Takao, Osamu Mori, Jun'ichiro Kawaguchi
Summary: Automated spacecraft docking is a technology that has been pursued for a long time, especially for deep space explorers and small spacecraft with limited resources for docking. The probe-cone docking mechanism is an effective solution to this problem, guiding the probe attached to the chaser satellite to the target satellite automatically. The present study proposes an automated docking mechanism using a flexible boom as the probe, with analysis of the multi-body system dynamics and development of an energy-based index for prediction of docking success.
Article
Engineering, Mechanical
Andres Garcia-Perez, Giuliano Coppotelli, Gustavo Alonso
Summary: This paper discusses the shocks and impact loads generated during the operational life of aerospace vehicles, and proposes a new method for Response Spectrum Analysis to accurately calculate peak response accelerations. The method is verified through numerical analyses on a beam structure to demonstrate improved accuracy compared to existing options.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Engineering, Mechanical
Yinzhong Yan, Q. M. Li
Summary: This study proposed a net zero displacement filter and a realistic time history synthesis method to synthesize acceleration-time histories from a given SRS specification, meeting the net zero displacement constraint and a given SRS specification within +/- 3 dB margin.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Agriculture, Dairy & Animal Science
Chun Li, Runxiang Zhang, Haidong Wei, Yanan Wang, Yongjie Chen, Hengyi Zhang, Xiang Li, Honggui Liu, Jianhong Li, Jun Bao
Summary: The study indicates that an enriched environment can enhance the adaptability of laying hens to transport stress by regulating the expression of heat shock response proteins and inflammatory cytokines, reducing the damage caused by transport stress.
Article
Engineering, Mechanical
Edward Chern Jinn Gan, Alex Remennikov, David Ritzel
Summary: This paper investigates the potential of using trees as natural blast barriers and reveals their ability to attenuate far-field blast waves and protect infrastructure targets through experimental results. A numerical model based on Computational Fluid Dynamics in ANSYS FLUENT is developed to explain the blast mitigation mechanism of barriers against far-field blast loads and to interpret experimental observations.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2021)
Article
Engineering, Aerospace
Zijun Zhang, Zijian Xu, Xudong Shao, Yuqing Li, Bingwei Li
Summary: This paper investigates the failure mode and damage boundary of piezoresistive pressure sensors under shock load, and concludes that the damage boundary of the sensor is determined by the pseudo-velocity shock response spectrum.
Article
Engineering, Mechanical
Desen Hou, Q. M. Li
Summary: This paper investigates the damage boundary of a single-degree-of-freedom (SDOF) structural model under shock environment. The shock environment is characterized by different shock-waveforms, and the upper and lower damage bounds on the shock response spectrum graph are proposed. The validity of these bounds is demonstrated using an idealized mass-plate model subjected to various shock loads.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Engineering, Civil
Magne Bratland, Dag Bjerketvedt, Knut Vaagsaether
Summary: This paper presents a structural response analysis based on experiments involving gas explosions in a channel, revealing the potential structural damage caused by pressure oscillations and frequency-dependent dynamic amplifications that need to be considered in design.
ENGINEERING STRUCTURES
(2021)
Article
Astronomy & Astrophysics
D. Trotta, H. Hietala, T. Horbury, N. Dresing, R. Vainio, L. Wilson, I Plotnikov, E. Kilpua
Summary: Interplanetary shocks are important structures in the heliosphere, and the first multi-spacecraft observations of shocklets associated with an unusually strong IP shock have been made. This discovery provides valuable insights into the energy conversion processes in astrophysical systems.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Engineering, Mechanical
Yongbo Jiang, Hongbin Yuan, Yonghua Li, Rui Gao, Ying Li
Summary: This paper proposes a damage boundary for vibration-impact injury in a wide range of frequency domain based on pseudo-velocity shock spectrum (PVSRS), and validates it through numerical simulation. The results show that the injury patterns of P-LS are frequency sensitive and the asymptote lines of the damage boundary are consistent with the theoretical results. The classified and standardized damage boundaries have more comprehensive and advanced potentials for engineering application.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Engineering, Marine
Dattatraya R. Hipparkar, Sunil Chandel
Summary: This paper presents an innovative solution to protect sensitive weapons stored inside submerged platforms from severe shock loads due to underwater explosions. The shock loads were analyzed using a shock response spectrum method, and the stiffness and damping characteristics were adjusted to reduce the shock load to an acceptable limit. The design of a simple, unique, reliable shock isolation system for underwater sensitive weapons was explained, and experimental tests were performed to validate the design.
Article
Engineering, Aerospace
Haitao Luo, Yuxin Li, Chaohui Fan, Xingyuan Wu, Guangming Liu
Summary: Deep space exploration technology is rapidly developing, and the penetrator method provides a cost-effective approach to study celestial bodies. In order to improve the survival rate of scientific payloads, researchers have developed a penetrator with a multilayer energy-absorbing structure.
Article
Astronomy & Astrophysics
C. Garcia Marirrodriga, A. Pacros, S. Strandmoe, M. Arcioni, A. Arts, C. Ashcroft, L. Ayache, Y. Bonnefous, N. Brahimi, F. Cipriani, C. Damasio, P. De Jong, G. Deprez, S. Fahmy, R. Fels, J. Fiebrich, C. Hass, C. Hernandez, L. Icardi, A. Junge, P. Kletzkine, P. Laget, Y. Le Deuff, F. Liebold, S. Lodiot, F. Marliani, M. Mascarello, D. Mueller, A. Oganessian, P. Olivier, E. Palombo, C. Philippe, U. Ragnit, J. Ramachandran, J. M. Sanchez Perez, M. M. Stienstra, S. Thuerey, A. Urwin, K. Wirth, I. Zouganelis
Summary: The Solar Orbiter's main scientific goal is to address the central question in heliophysics: how does the Sun create and control the heliosphere? It carries ten scientific instruments towards the innermost regions of the Solar System, reaching as close as 0.28 AU from the Sun. The spacecraft's orbital inclination will be progressively increased to reach higher solar latitudes, enabling detailed studies of the polar regions of the Sun for the first time.
ASTRONOMY & ASTROPHYSICS
(2021)