Subjects: Engineering and technical science >> Other Disciplines of Engineering and technical science submitted time 2023-11-10 Cooperative journals: 《应用力学学报》
Abstract: Nano-materials can effectively improve the mechanical properties and durability of cement-based materials.In order to explore the strengthening mechanisms of nano-SiO2 and nano-Fe2O3 on concrete materials,concrete specimens are mixed with nano-SiO2 only,nano-Fe2O3 only,and both nano-SiO2 and nano-Fe2O3 in the range of 0%-2.0%,respectively,to carry out an experimental research on the mechanical properties of concrete with curing ages of 7 d and 28 d.The results shows that the mechanical properties of modified concrete reach the best when the total content of nano-materials is 1.5%,in which the content of nano-SiO2 is 1.0% and nano-Fe2O3 is 0.5%,and that modified concrete with this compound ratio has better mechanical properties than ordinary concrete and single-mixed modified concrete with the same content.Cold field emission scanning electron microscope is used to observe the internal micro morphology of the nano-modified concrete,and the chemical composition of the nano-modified concrete is analyzed with the help of energy dispersive spectrometer.It can be found that the mixed nano-SiO2 and nano-Fe2O3 will have crystal nucleation and chemically react with Ca(OH)2 crystal grains to form coral-like and spherical hydration products C-S-H gel and C-F-H gel in the concrete.The highly active crystal nucleus can adsorb gel gathering on the surface,which will reduce the number of Ca(OH)2 particles and complementarily fill the gap to form dense hydration products,making the concrete structure more compact and dense.These results can provide reference for the research and development of high performance concrete.
Subjects: Engineering and technical science >> Other Disciplines of Engineering and technical science submitted time 2023-11-10 Cooperative journals: 《应用力学学报》
Abstract:
Based on the theory for laminated plates and shells,governing equations for post-buckling of anti-symmetrical laminated composite plates are derived in terms of stress function and transverse deflection by considering the tension-bending coupling effect and the von-Kaman nonlinear geometric relation.By introducing the non-dimensional parameters,the nonlinear governing equations and the boundary conditions are nondimensionalized to eliminate the influence of the material properties and the geometric parameters.Perturbation approach is applied to expand the governing equations as well as the boundary conditions into a series equations of a small perturbation parameter.Analytical solutions of the critical buckling load and the post-buckling equilibrium path for anti-symmetric cross plied composite laminates with simply supported boundary conditions are obtained by examining the characteristics of the general and particular solutions.After that,the buckling and post-buckling of the composite laminates with antisymmetric angle-ply under in-plane compressive load are analyzed using ABAQUS software,and the results from ABAQUS are compared with the theoretical solutions.It shows that the two results are in very good agreement which verifies the accuracy and effectiveness of the proposed analytical approach.Using the established solutions,the influences of the orientation angle of the composite ply,the number of the composite ply and tension-bending coupling effect on the post-buckling performance of the laminate are discussed.It is found that the critical buckling load of the laminate plate is significantly affected by the orientation angle and the tension-bending coupling effect will greatly reduce the post-buckling load carry capability of the laminates.
Subjects: Engineering and technical science >> Other Disciplines of Engineering and technical science submitted time 2023-11-10 Cooperative journals: 《应用力学学报》
Abstract: Large eddy simulation(LES)and acoustic analogy(AA)method are combined to calculate the sound field of SD7003 porous airfoil self-noise under the condition of a low Mach number.The influence of the porous materials on the far-field sound pressure of the airfoil self-noise is analyzed under the condition of different angle of attact,and the noise reduction mechanism of the airfoil is explained.The results show that the LES/AA method can not only accurately calculate the boundary layer characteristics and the far-field sound pressure of porous airfoil,but the numerical simulation results are in good agreement with the experimental results.When the angle of attact is 0°,the overall sound pressure level of the porous airfoil decreases first and then increases with the decrease of the permeability,and the noise reduction effect of the porous material is the best when the permeability is5×10-11 m2.The overall sound pressure level of the porous airfoil increases with the increase of angle of attack,but the noise reduction effect of the porous materials decreases with the increase of angle of attack.The large-scale coherent structures on the airfoil surface are weakened due to the existence of the porous materials,and the peak of the RMS pressure fluctuation on the airfoil surface decreases,thus effectively suppressing the airfoil far-field noise.
Subjects: Engineering and technical science >> Other Disciplines of Engineering and technical science submitted time 2023-11-10 Cooperative journals: 《应用力学学报》
Abstract: The connection between composite panel and metal panel of civil aircraft is an important research content of fuselage structure design,and how to connect the composite cap stringer with the metal Z-shaped/2-shaped stringer is the focus and difficulty of the research.A new hybrid connection structure is proposed in this paper,the influence of embedded defects and BVID on the test piece is considered.The strength characteristics of the hybrid connection structure,the stress condition,failure mode and failure position of the test piece are studied by experimental and numerical simulation; the load transfer problem of composite cap stringer and metal Z-shaped/2-shaped stringer connection is well solved.The results show that the structure meets the design requirements of composite panel and metal panel stringer connection structure and strength,embedded defects and BVID have no effect on the failure load and failure mode of the test piece.The above research results provide important guidance for the research and development of civil aircraft.
Subjects: Engineering and technical science >> Other Disciplines of Engineering and technical science submitted time 2023-11-10 Cooperative journals: 《应用力学学报》
Abstract:
Vibration isolation platform connects the photoelectric tracking-aiming pod to the helicopter body,and is significant to tracking accuracy of the airborne tracking-aiming system.Employing the parallel structure of multiple cage vibration isolators,a new passive vibration isolation platform for the helicopter tracking system is designed.The spatial pose of the isolation platform is described by Euler transformation,and the dynamic model is established based on the Lagrange dynamics method,and the vibration transmission rate under different excitation frequencies is obtained.The correctness of the theoretical model of the vibration isolation platform is verified by using ANSYS dynamics module simulation,the redundant protection capability of the vibration isolation platform under high overload is checked,the isolation effect is investigated by flight test.
Subjects: Engineering and technical science >> Other Disciplines of Engineering and technical science submitted time 2023-09-05
Abstract: This paper presents an overview of the theories and computer implementation aspects of phase field models (PFM) of fracture. The advantage of PFM over discontinuous approaches to fracture is that PFM can elegantly simulate complicated fracture processes including fracture initiation, propagation, coalescence, and branching by using only a scalar field, the phase field. In addition, fracture is a natural outcome of the simulation and obtained through the solution of an additional differential equation related to the phase field. No extra fracture criteria are needed and an explicit representation of a crack surface as well as complex track crack procedures are avoided in PFM for fracture, which in turn dramatically facilitates the implementation. The PFM is thermodynamically consistent and can be easily extended to multi-physics problem by 'changing' the energy functional accordingly. Besides an overview of different PFMs, we also present comparative numerical benchmark examples to show the capability of PFMs.
Subjects: Engineering and technical science >> Other Disciplines of Engineering and technical science submitted time 2023-01-10 Cooperative journals: 《Art & Design Research》
Abstract:
Cultural confidence is one of the important factors to promote the inheritance and development of excellent national culture. Maonan traditional craft contains excellent national culture, cultural customs and so on, which is a part of carrying forward China's traditional culture confidence. From the perspective of cultural confidence, this paper analyzes the characteristics and advantages of the current Maonan traditional crafts and puts forward suggestions to promote the innovative development of Maonan traditional crafts, which can better promote the inheritance and development of Maonan traditional crafts.
Subjects: Engineering and technical science >> Other Disciplines of Engineering and technical science submitted time 2023-01-10 Cooperative journals: 《Art & Design Research》
Abstract:
Driven by the rapid development of omnimedia, the Internet, movies, television, etc. have gradually blend in people’s daily lives, and cartoons are also deeply loved by children. Colleges and universities are an important base for cultivating animation talents, in the process of carrying out animation teaching, due to the short setting up time and other reasons, it is necessary to continuously improve the teaching system of animation professional courses, and comprehensively analyze the current problems in teaching, so as to provide more help for students’ learning and avoid being affected by a variety of factors that lead to the inability to effectively improve teaching efficiency. In the language environment of omnimedia, it is necessary to actively improve the efficiency of animation teaching, optimize the teaching system according to the actual situation, and implement the teaching of all links to maximize the role of curriculum system reform. Based on this, this paper mainly analyzes the importance and necessity of animation curriculum reform in the language environment of omnimedia.
Subjects: Engineering and technical science >> Other Disciplines of Engineering and technical science submitted time 2023-01-10 Cooperative journals: 《Art & Design Research》
Abstract:
Traditional dwellings with high regional artistic expression, is an important carrier of China's national culture, regional characteristics, ethnic customs. The wooden architecture of the Dong Nationality 's residential houses originated from the southern stilt-style architecture. Its unique construction technology is a treasure of national culture. Studying the aesthetic implication of Dong residential buildings will help people understand Dong culture more deeply. From the perspective of artistic aesthetics, this paper makes a detailed study of the dwellings of Dong people from five aspects: the environmental beauty of man-nature harmony, the beauty of building materials, the beauty of structure, the beauty of architectural skills and the beauty of culture. Hope to help readers understand the spiritual core of Dong culture, to better protect the Dong residential buildings wooden.
Subjects: Engineering and technical science >> Other Disciplines of Engineering and technical science submitted time 2023-01-10 Cooperative journals: 《Art & Design Research》
Abstract:
In the past 30 years, the development of brownland into green land has become an important way for the sustainable development and management of urban land. Fully understanding the various application scenarios and values of this approach is helpful to explore its efforts in providing ecosystem services and meet the development needs of different types of cities. This paper reviews the practice and literature of brownfield redevelopment from the perspective of landscape architecture, and obtains the process of its theoretical development and its understanding deepening. Through sorting out the relevant discipline literature, the seven main green space types and their potential broad benefits are summarized, and we realize that the brownfield itself has many values that cannot be ignored in the development process. On this basis, it proposes that there is a new cognition of the relationship between brownfield and green space.
Subjects: Engineering and technical science >> Other Disciplines of Engineering and technical science submitted time 2023-01-10 Cooperative journals: 《Art & Design Research》
Abstract:
In the post-epidemic era, great turbulence has taken place in the field of human life, especially the travel rate of people has been greatly reduced, but the requirements for urban public space required for travel are constantly improving.As the main social life space carrier of street space requires carrying more functions to meet the requirements of the outbreak era.Through literature search and social investigation, the optimization design strategy is proposed for the problems of weak slow traffic use right, monotonous space function, lack of commercial management, and random public facilities of urban streets. Then, through the legend analysis, the optimization effect of street space in four levels of environmental comfort, functional diversification, management order and facilities refine#2;ment can be achieved to improve the residents' street life experience and return to the public space essence of "people-oriented" street.
Subjects: Engineering and technical science >> Other Disciplines of Engineering and technical science submitted time 2023-01-03 Cooperative journals: 《2022年第三届艺术设计、传播与工程科学研讨会》
Abstract: With the change in media technology, the pattern of time and space is constantly broken, and the development of media tends to be more and more spatial and temporal freedom. On the social level, the social range of the general public is expanding, and the social distance is shrinking based on the expansion. However, people's senses have also changed, from balance to breaking balance to the constant pursuit of balance. In this paper, we will discuss the body logic of social networks and the future development trend of social networks from the perspective of senses based on the change of senses in the media.
Subjects: Engineering and technical science >> Other Disciplines of Engineering and technical science submitted time 2023-01-03 Cooperative journals: 《2022年第三届艺术设计、传播与工程科学研讨会》
Abstract: In order to explore the cultural connotation and artistic characteristics of Tang Dynasty ceramic decorative patterns, integrate traditional ethnic decorative patterns with modern design, and promote the inheritance and development of excellent traditional culture, this paper first understands the decorative patterns of Tang Dynasty ceramics by reading books and consulting materials, collects representative ceramic utensils of the Tang Dynasty, and extracts the decorative patterns on these cultural relics, analyzes the inner meaning of the patterns through semiotics, and understands their aesthetic characteristics. The use of shape grammar, complexity into simplicity, decomposition and reconstruction of the extracted pattern for innovative design, into the modern aesthetic concept, according to its semantic and visual characteristics into the modern product design and decoration. The Tang Dynasty is a representative period of China's culture, and the combination of Tang Dynasty patterns and modern design is conducive to inheriting the excellent culture of the Tang Dynasty, while increasing the cultural value of modern design and enhancing product competitiveness.
Subjects: Engineering and technical science >> Other Disciplines of Engineering and technical science submitted time 2023-01-03 Cooperative journals: 《2022年第三届艺术设计、传播与工程科学研讨会》
Abstract: The formal aesthetics of calligraphy is an important content in the process of modern Chinese aesthetics. In the first half of the 20th century, Western aesthetics was more active in the Chinese aesthetics and art circles. In the process of meeting with Chinese traditional aesthetics, it had a profound impact on Chinese scholars and promoted their thinking on traditional Chinese aesthetics. The research perspective of most scholars has shifted from the direction of Western aesthetics to Chinese ontology aesthetics. Most of them studied abroad in their early years, focusing on Western aesthetics. After returning to China, they made active contributions to the modernization of traditional Chinese aesthetics. These traditional literati scholars all have a cultural background of middle school and western learning, so when they discuss the issues involved in calligraphy aesthetics, they unconsciously explain both Chinese and Western aesthetic viewpoints. Among them, Deng Yizhe's aesthetic research on painting and calligraphy is the most detailed.
Subjects: Engineering and technical science >> Other Disciplines of Engineering and technical science submitted time 2023-01-03 Cooperative journals: 《2022年第三届艺术设计、传播与工程科学研讨会》
Abstract: Aiming at the current situation that many elderly people with sudden illnesses have lost their lives due to missing the "golden time" of first aid in the natural landscape tourism environment, in order to solve the waste of medical resources in the rescue station in the natural landscape tourism environment, the relief terrain is complex, Help is not timely and other pain points. Taking the Leshan Giant Buddha Scenic Spot as an example, through the methods of user portraits and questionnaires, we can deeply explore its pain points and internal needs, and provide the basis for the current situation of the elderly in sudden diseases during tourism. Comprehensive analysis is made from the perspectives of the elderly, rescuers, scenic spots, and first-aid equipment, and a public emergency strategy based on the natural landscape tourism environment is constructed. The medical resources in the scenic spot increase the rescue opportunities for patients, and strive for rescue time for the elderly who have sudden illnesses. Improve the first aid knowledge reserve and self-rescue ability of the general population, enhance the sense of social responsibility and security of the whole people, and provide more reference for the improvement of the "Internet plus" medical system.
Subjects: Engineering and technical science >> Other Disciplines of Engineering and technical science submitted time 2023-01-03 Cooperative journals: 《2022年第三届艺术设计、传播与工程科学研讨会》
Abstract: In the previous studies on yi nationality lacquer, scholars mostly studied the shape, pattern, function and industry of lacquer, but few studied it from the cultural perspective. With the development of The Times and the integration of different cultures, lacquerware is no longer a daily item for every Yi family, and its cultural connotation is paid little attention to. Based on the method of literature research and field research, the research will study the cultural origin, cultural structure, characteristics and functions of liangshan Yi lacquer ware in Sichuan and its cultural connotation, and put forward suggestions for the development of Liangshan Yi lacquer ware.
Subjects: Engineering and technical science >> Other Disciplines of Engineering and technical science submitted time 2023-01-03 Cooperative journals: 《2022年第三届艺术设计、传播与工程科学研讨会》
Abstract: In response to the short life cycle, serious waste of resources, and cumbersome steps in the product use process in the stationery market, from the perspective of sustainability and ergonomics, comprehensively apply the KANO model and TRIZ theory to study the improved design of stationery sets. Taking the target user as the interview object, firstly conduct user interviews and discover the pain points of the existing stationery sets on the market; propose improved demand points for the concentrated pain points, and conduct KANO questionnaire distribution and analysis to obtain the key requirements for improving user satisfaction; combine the key requirements , Using the 39-factor Altshuller contradiction matrix table provided by TRIZ theory and 40 invention principles, through comparison and screening, the final optimized design plan is obtained, which provides solutions for the improved design of stationery sets, so as to improve the product and the user, The relationship with the use environment, to achieve the purpose of product sustainability.
Subjects: Engineering and technical science >> Other Disciplines of Engineering and technical science submitted time 2023-01-03 Cooperative journals: 《2022年第三届艺术设计、传播与工程科学研讨会》
Abstract: To optimize the cultural experience of users in using digital creative products of intangible cultural heritage and enhance the promotion of intangible cultural heritage projects, this paper proposes a corresponding product design method based on the Flow theory. Taking the factors of the Flow theory as the starting point, this paper combines the user experience process corresponding to the use scenario of NRM digital creative products, from which the the Flow journey diagram of general users in the NRM experience is summarized and optimized, and the specific design solution process is constructed in this way. This paper introduces the Flow theory to NRM. And this paper introduces the Flow theory into the design and application of digital creative products of intangible cultural heritage, to improve the immersion experience of existing digital creative products of intangible cultural heritage, enhance the bond between users and intangible cultural heritage, and also provide theoretical and practical references for the preservation and innovative transformation of intangible cultural heritage.
Subjects: Engineering and technical science >> Other Disciplines of Engineering and technical science submitted time 2023-01-03 Cooperative journals: 《2022年第三届艺术设计、传播与工程科学研讨会》
Abstract: The advent of extended reality (XR) in red tourism is revamping tourist experience. Compare to tour guide service in other-directed travel, the influence of XR technology in self-directed travel on perceived value and behavior intention needs further research. This paper constructs a conceptual model based on the relationship between tourist experience, perceived value and behavior intention. Basic data in the memorial hall in a memorial park dedicated to the Battle of the Xiangjiang River during the Long March were obtained through questionnaire survey. After collecting the data, this paper uses structural equation model to verify the hypotheses. As a result of this analysis, the present study offers the following conclusions: First, self-directed tourist experience has positive influence on knowledge value and experience value. Second,other-directed tourist experience has positive influence on knowledge value and sentimental value. Third, experience value, self-directed tourist experience and other-directed tourist experience has positive influence on behavior intention.
Subjects: Engineering and technical science >> Other Disciplines of Engineering and technical science submitted time 2023-01-03 Cooperative journals: 《2022年第三届艺术设计、传播与工程科学研讨会》
Abstract:
As an intangible cultural heritage of China, straw weaving craftsmanship has a long history, diverse weaving methods and unique skills. Its rich cultural charm can not only be used as functional utensils, but also as artistic expression of handicraft creators. However, in this ever-changing trend of the times, the closed and backward development of straw weaving craftsmanship has caused a serious disconnection between the supply and demand of straw weaving craftsmanship, and there is a huge gap between the development of straw weaving craftsmanship and people's high-level life and artistic pursuit. In view of the current phenomenon, starting from the theory of artistic aesthetic, this paper further to explore the aesthetic characteristics and knitting craftsmanship of straw weaving, aiming to excavate and understand its aesthetic value, analyze the value implication from different perspectives, aesthetic symbol and artistic connotation embodied in traditional straw weaving craftsmanship, so as to provide beneficial supplement and reference for the inheritance and research of straw weaving. This paper mainly explores the form, material and culture of Chinese traditional straw weaving, and investigates the artistic characteristics expressed by the diversity of straw weaving culture. Finally, the historical value of straw weaving craftsmanship is analyzed to arouse people's attention to traditional culture.