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Recent Advances in Space-Deployable Structures in China
Xiaofei Ma, Tuanjie Li, Jingya Ma, Zhiyi Wang, Chuang Shi, Shikun Zheng, Qifeng Cui, Xiao Li, Fan Liu, Hongwei Guo, Liwu Liu, Zuowei Wang, Yang Li
Engineering 2022, Volume 17, Issue 10, Pages 207-219 doi: 10.1016/j.eng.2022.04.013
Deployable space structure technology is an approach used in building spacecraft, especially when realizing deployment and folding functions. Once in orbit, the structures are released from the fairing, deployed, and positioned. With the development of communication, remote-sensing, and navigation satellites, space-deployable structures have become cutting-edge research topics in space science and technology. This paper summarizes the current research status and development trend of spacedeployable structures in China, including large space mesh antennas, space solar arrays, and deployable structures and mechanisms for deep-space exploration. Critical technologies of space-deployable structures are addressed from the perspectives of deployable mechanisms, cable-membrane form-finding, dynamic analysis, reliable environmental adaptability analysis, and validation. Finally, future technology developments and trends are elucidated in the fields of mesh antennas, solar arrays, deployable mechanisms, and on-orbit adjustment, assembly, and construction.
Keywords： Deployable space structures Mesh antennas Solar arrays Deep-space exploration
Guo Hongwei: Design of Large and Lightweight Space Expandable Mechanisms (2023-3-30)
26 Apr 2023
Keywords： 空间可展开结构
Chengjun Zeng, Liwu Liu, Yang Du, Miao Yu, Xiaozhou Xin, Tianzhen Liu, Peilei Xu, Yu Yan, Dou Zhang, Wenxu Dai, Xin Lan, Fenghua Zhang, Linlin Wang, Xue Wan, Wenfeng Bian, Yanju Liu, Jinsong Leng
Engineering 2023, Volume 28, Issue 9, Pages 49-57 doi: 10.1016/j.eng.2023.01.005
Once China's Tianwen-1 Mars probe arrived in a Mars orbit after a seven-month flight in the deep cold space environment, it would be urgently necessary to monitor its state and the surrounding environment. To address this issue, we developed a flexible deployable subsystem based on shape memory polymer composites (SMPC-FDS) with a large folding ratio, which incorporates a camera and two temperature
telemetry points for monitoring the local state of the Mars orbiter and the deep space environment. Here, we report on the development, testing, and successful application of the SMPC-FDS. Before reaching its Mars remote-sensing orbit, the SMPC-FDS is designed to be in a folded state with high stiffness; after reaching orbit, it is in a deployed state with a large envelope. The transition from the folded state to the
deployed state is achieved by electrically heating the shape memory polymer composites (SMPCs); during this process, the camera on the SMPC-FDS can capture the local state of the orbiter from multiple angles. Moreover, temperature telemetry points on the SMPC-FDS provide feedback on the environment temperature and the temperature change of the SMPCs during the energization process. By simulating a
Mars on-orbit space environment, the engineering reliability of the SMPC-FDS was comprehensively verified in terms of the material properties, structural dynamic performance, and thermal vacuum deployment feasibility. Since the launch of Tianwen-1 on 23 July 2020, scientific data on the temperature environment around Tianwen-1 has been successfully acquired from the telemetry points on the
SMPC-FDS, and the local state of the orbiter has been photographed in orbit, showing the national flag of China fixed on the orbiter.
Keywords： Flexible deployable structure Shape memory polymer composite Mars exploration Temperature telemetry On-orbit deployment
Haitao Yu,Baolin Tian,Zhen Yan,Haibo Gao,Hongjian Zhang,Huiqiang Wu,Yingchao Wang,Yuhong Shi,Zongquan Deng
Engineering 2023, Volume 20, Issue 1, Pages 120-133 doi: 10.1016/j.eng.2022.05.015
The reusable launch vehicle (RLV) presents a new avenue for reducing cost of space transportation. The landing mechanism, which provides landing support and impact absorption, is a vital component of the RLV at final stage of recovery. This study proposes a novel legged deployable landing mechanism (LDLM) for RLV. The Watt-II six-bar mechanism is adopted to obtain the preferred configuration via the application of the linkage variation approach. To endow the proposed LDLM with advantages of large landing support region, lightweight, and reasonable linkage internal forces, a multi-objective optimization paradigm is developed. Furthermore, the optimal scale parameters for guiding the LDLM prototype design is obtained numerically using the non-dominated sorting genetic algorithm-II (NSGA-II) evolutionary algorithm. A fully-functional scaled RLV prototype is developed by integrating the gravity-governed deploying scheme to facilitate unfolding action to avoid full-range actuation, a dual-backup locking mechanism to enhance reliability of structure stiffening as fully deployed, and a shock absorber (SA) with multistage honeycomb to offer reliable shock absorbing performance. The experimental results demonstrate that the proposed LDLM is capable of providing rapid and smooth deployment (duration less than 1.5 s) with mild posture disturbance to the cabin (yaw and pitch fluctuations less than 6°). In addition, it provides satisfactory impact attenuation (acceleration peak less than 10g) in the 0.2 m freefall test, which makes the proposed LDLM a potential alternative for developing future RLV archetype.
Keywords： Reusable launch vehicle (RLV) Deployable mechanism Optimization design
Theoretical Study and Engineering Practice of Long-Span Spatial Structures
Shen Shizhao
Strategic Study of CAE 2001, Volume 3, Issue 3, Pages 34-41
The development of long-span spatial structures is characterized by the continual innovation of structural forms and the prompt support of theoretical studies. Several unconventional spatial structures designed by the author are introduced in this article as examples to demonstrate the efforts of Chinese engineers to create innovative structural forms in the recent two decades. Some theoretical studies by the author including the analytic theory of cable-suspended structures, the stability of reticulated shells, the seismic behavior and vibration control of reticulated shells, as well as the wind-induced response analysis of cable structures are also presented.
Keywords： spatial structures reticulated shells cable-suspended structures membrane structures structural stability seismic response analysis wind-induced response analysis
Space structures and Olympic gymnasiums
Shen Shizhao
Strategic Study of CAE 2008, Volume 10, Issue 8, Pages 12-21
Space structures are always preferred for Olympic stadiums and gymnasiums due to their great variety of forms, efficient mechanical behavior and the ability to cover large spans. The construction of 2008 Beijing Olympic stadiums and gymnasiums provides an enormous stage for space structures. It is advisable and useful for the further development of space structures to summarize the advanced design concepts, innovative structural forms as well as the new materials and techniques used in these stadiums and gymnasiums. A brief introduction to the 2008 Beijing Olympic stadiums and gymnasiums is presented first, then some representative Olympic stadiums and gymnasiums are discussed with respect to their novel architectural appearance, advanced structural forms and innovative techniques applied in design, construction and monitoring. By reviewing a number of classical Olympic stadiums and gymnasiums, their common characteristics are summarized as:perfect combination of novel architectural appearance, innovative structural form and satisfactory service performance;in accordance with the development of construction techniques, and hence promoting the progress of technology. Compared to the outstanding classical Olympic buildings, it is believed that some representative stadiums and gymnasiums of the 2008 Olympic Games do have the qualities to be recognized as the new members of this glorious list.
Keywords： space structure Olympic stadium design concept innovative technique
Fuzzy Extension Economy Control with the Restriction of Multi-dimension Jieke
Li Hua,Liu Feng,He Zhongxiong
Strategic Study of CAE 2001, Volume 3, Issue 8, Pages 51-57
This paper discussed the intelligence control of the complex large scale systems , especially of the economy system. The entity participated in competition is regarded as a point in the fuzzy extension economy space, and all kinds of restriction conditions as a N-dimensions' jieke. Then the definition of the jieke's restriction degree is given. When the entity participates in competition, it must get the information first, and wipe off the information yawp. In order to find the best jieke and jie-gate, the extension force can be used.
Keywords： complex large scale system FEES jieke impact jie-gate extension
Sustainable High-Performance Resilient Structures
Hong Hao, Jun Li
Engineering 2019, Volume 5, Issue 2, Pages 197-198 doi: 10.1016/j.eng.2019.02.001
Three-dimensional shape space learning for visual concept construction: challenges and research progress Perspective
Xin TONG
Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 9, Pages 1290-1297 doi: 10.1631/FITEE.2200318
Keywords： 视觉概念；视觉知识；三维几何学习；三维形状空间；三维结构
Intelligent Monitoring System Based on Spatio–Temporal Data for Underground Space Infrastructure Review
Bowen Du, Junchen Ye, Hehua Zhu, Leilei Sun, Yanliang Du
Engineering 2023, Volume 25, Issue 6, Pages 194-203 doi: 10.1016/j.eng.2022.07.016
Intelligent sensing, mechanism understanding, and the deterioration forecasting based on spatio–temporal big data not only promote the safety of the infrastructure but also indicate the basic theory and key technology for the infrastructure construction to turn to intelligentization. The advancement of underground space utilization has led to the development of three characteristics (deep, big, and clustered) that help shape a tridimensional urban layout. However, compared to buildings and bridges overground, the diseases and degradation that occur underground are more insidious and difficult to identify. Numerous challenges during the construction and service periods remain. To address this gap, this paper summarizes the existing methods and evaluates their strong points and weak points based on real-world space safety management. The key scientific issues, as well as solutions, are discussed in a unified intelligent monitoring system.
Keywords： Structure health monitoring Underground space infrastructure Machine learning Spatio–temporal data
Construction Technology of Shanghai Jinmao Building
Ye Keming,Fan Qingguo
Strategic Study of CAE 2000, Volume 2, Issue 10, Pages 42-49
Shanghai Jinmao building is the 3rd highest building in the world at present. The main building consists of reinforced concrete core wall and exterior structure steel frame. It is rather difficult to construct this edifice in such a poor soil condition in Shanghai. Proceeding from actual facts, Shanghai Construction Groups (SCG) makes efforts to conduct technology innovation, and absorbs advanced experiences domestic and abroad wildly. A unit of unique construction technique and a suitable managing system were developed with the growth of this building. SCG successfully solved a series of construction difficulties including deep-foundation work, mega-columns construction, high - altitude construction and erection, and so on. It only spent 4 years on this building, which set a high-speed record in construction history.
Keywords： Jinmao Building extra-deep slurry wall extra-high building big-size steel tube pile installation of steel structure changeable integrated auto-moving form system
Development of new systems of reinforced concrete spatial grid structure in China
Ma Kejian,Zhang Huagang,Xiao Jianchun,Lu Yaqin
Strategic Study of CAE 2008, Volume 10, Issue 8, Pages 22-34
Reinforced concrete spatial grid structure includes planar open-web grid structure, open-web sandwich plate structure, open-web dual grid structure, cast-in-place concrete round eye hollow plate structure, these new structure systems have been applied in the plate of public buildings amount to more than 1 million square meters from the 1980s until now, and obtained the excellent social and economic efficiency. The corresponding technical specifications for some have been established. In recent years, we have developed the reinforced concrete open-web sandwich shell and arch structure through bending the reinforced concrete open-web sandwich plate structure by one direction,and the reinforced concrete open-web sandwich hyperbolic flat shell structure through bending the reinforced concrete open-web sandwich plate structure by the two directions These new spatial grid structure systems have the proprietary intellectual property rights of our country and have their own characteristic and the compatibility for the buildings. In the paper, we will introduce one by one successively according to the development time order. The security and rationality and efficiency and advancement of the structure will be analyzed through the project examples.
Keywords： reinforced concrete open-web sandwich plate cast-in-place concrete round eye hollow plate grid structure shell structure
Optimization of Urban Spatial Structure Based on TOD Model
Lu Huapu, Liu Ruoyang , Zhang Yongbo , Fu Zhihuan
Strategic Study of CAE 2022, Volume 24, Issue 6, Pages 137-145 doi: 10.15302/J-SSCAE-2022.06.012
Traffic congestion and environmental pollution restrain the high-quality development of cities and the improvement of residents' living quality. A transit-oriented-development (TOD) model that integrates transportation with land use is key to solving the abovementioned problems. This study uses mechanism analysis to investigate the relationship between transportation and land use, analyzes the differences between TOD and conventional models regarding land use patterns and population distribution, and investigates the population distribution characteristics of the TOD model and its coupling relationship with transportation. Moreover, the current status and problems of TOD in China are analyzed through case study, indicating that the implications, development goals, and paths of TOD models vary for different scenarios. Additionally, a reasonable urban spatial structure is proposed comprising urban spatial structures at three levels: urban agglomerations, metropolitan and downtown areas, and rail transit stations and their surrounding areas. The basic ideas, planning and design principles, and implementation paths for the deep integration of the proposed structure with transportation are explored. Furthermore, we suggest that measures should be taken in terms of management planning, laws and policies, standards and specifications, benefit distribution, planning approval, incentive mechanism, and public participation, thereby providing support for TOD model application and for improving urban construction.
Keywords： urban spatial structure integration of transportation and land use transit-oriented development urban agglomeration metropolitan and downtown area rail transit station
Title Author Date Type Operation
Recent Advances in Space-Deployable Structures in China
Xiaofei Ma, Tuanjie Li, Jingya Ma, Zhiyi Wang, Chuang Shi, Shikun Zheng, Qifeng Cui, Xiao Li, Fan Liu, Hongwei Guo, Liwu Liu, Zuowei Wang, Yang Li
Journal Article
Guo Hongwei: Design of Large and Lightweight Space Expandable Mechanisms (2023-3-30)
26 Apr 2023
Conference Videos
Chen Yan: Folding Polyhedra (2023-3-30)
6 Apr 2023
Conference Videos
A Shape-Memory Deployable Subsystem with a Large Folding Ratio in China’s Tianwen-1 Mars Exploration Mission
Chengjun Zeng, Liwu Liu, Yang Du, Miao Yu, Xiaozhou Xin, Tianzhen Liu, Peilei Xu, Yu Yan, Dou Zhang, Wenxu Dai, Xin Lan, Fenghua Zhang, Linlin Wang, Xue Wan, Wenfeng Bian, Yanju Liu, Jinsong Leng
Journal Article
Guo Hongwei: Reflections on Improving the Performance of Large Scale Ground Antennas (2023-3-30)
26 Apr 2023
Conference Videos
Watt Linkage–Based Legged Deployable Landing Mechanism for Reusable Launch Vehicle: Principle, Prototype Design, and Experimental Validation
Haitao Yu,Baolin Tian,Zhen Yan,Haibo Gao,Hongjian Zhang,Huiqiang Wu,Yingchao Wang,Yuhong Shi,Zongquan Deng
Journal Article
Theoretical Study and Engineering Practice of Long-Span Spatial Structures
Shen Shizhao
Journal Article
Fuzzy Extension Economy Control with the Restriction of Multi-dimension Jieke
Li Hua,Liu Feng,He Zhongxiong
Journal Article
Three-dimensional shape space learning for visual concept construction: challenges and research progress
Xin TONG
Journal Article
Intelligent Monitoring System Based on Spatio–Temporal Data for Underground Space Infrastructure
Bowen Du, Junchen Ye, Hehua Zhu, Leilei Sun, Yanliang Du
Journal Article
Development of new systems of reinforced concrete spatial grid structure in China
Ma Kejian,Zhang Huagang,Xiao Jianchun,Lu Yaqin
Journal Article
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