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Tytuł:
Conflict and Facilitation Between Work and Family Roles and Goal Realization in Entrepreneurs
Autorzy:
Łagowska, Kinga
Łaguna, Mariola
Purc, Ewelina
Powiązania:
https://bibliotekanauki.pl/articles/31343476.pdf
Data publikacji:
2024
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
Tematy:
work–family balance
conflict
facilitation
goal realization
entrepreneurs
structural equation modeling
Opis:
Entrepreneurs running their businesses usually pursue goals associated with work and family functioning. The efficiency of goal realization in these two areas of activity varies and may depend on balance between the two domains. The study aimed to answer the question of how interplays between the work and family domains (work-to-family conflict, family-to-work conflict, work-to-family facilitation, and family-to-work facilitation) were related to the realization of work and family goals in entrepreneurs. It also tested if sex was a moderator of these relationships. A total of 246 entrepreneurs participated in the study; they were married or in stable non-marital relationships. Structural equation modeling showed that family-to-work conflict is negatively related to work goal realization and family goal realization, and work-to-family facilitation is positively related to family goal realization. Sex does not moderate the relationships analyzed. The study provides insight into the relationships of conflict and facilitation to goal realization in people running their businesses.
Źródło:
Roczniki Psychologiczne; 2024, 27, 1; 49-66
1507-7888
Pojawia się w:
Roczniki Psychologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A BIM technology-based underwater structure damage identification and management method
Autorzy:
Li, Xiaofei
Su, Rongrong
Cheng, Peng
Sun, Heming
Meng, Qinghang
Song, Taiyi
Wei, Mengpu
Zhang, Chen
Powiązania:
https://bibliotekanauki.pl/articles/2204531.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
building information modeling
underwater structural disease
damage identification
deep learning
modelowanie informacji o budynku
identyfikacja uszkodzeń
uczenie głębokie
uszkodzenie podwodnej konstrukcji
Opis:
With the continuous development of bridge technology, the condition assessment of large bridges has gradually attracted attention. Structural Health Monitoring (SHM) technology provides valuable information about a structure's existing health, keeping it safe and uninterrupted use under various operating conditions by mitigating risks and hazards on time. At the same time, the problem of bridge underwater structure disease is becoming more obvious, affecting the safe operation of the bridge structure. It is necessary to test the bridge’s underwater structure. This paper develops a bridge underwater structure health monitoring system by combining building information modeling (BIM) and an underwater structure damage algorithm. This paper is verified by multiple image recognition networks, and compared with the advantages of different networks, the YOLOV4 network is used as the main body to improve, and a lightweight convolutional neural network (Lite-yolov4) is built. At the same time, the accuracy of disease identification and the performance of each network are tested in various experimental environments, and the reliability of the underwater structure detection link is verified.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2023, 71, 2; art. no. e144602
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling and Identification Method of Bolt Loosening of Joint Surface under Axial Tension of Multistage Disk-Drum Rotor
Autorzy:
Yue, Cong
Zheng, Xiangmin
Wang, Chaoge
Liu, Hao
Chen, Hu
Powiązania:
https://bibliotekanauki.pl/articles/24200822.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
multistage drum rotor
bolt loosening
equivalent joint stiffness
structural health monitoring
Opis:
Individual bolt at key connection positions is prone to loose when the engine is cycle-operating under complex loads. A joint surface equivalent stiffness model is derived and developed based on the connection characteristics of bolt screwing in the multi-exciting environment of the high-pressure rotor. The model is used to analyse the effect of bolt missing at circumferential positions with the equivalent stiffness loss. Vibration experiments under both axial force and lateral impact were carried out to obtain the dynamic response feature of the multistage disk-drum simulated rotor with missing one bolt at different positions. The Spearman correlation coefficient was applied to evaluate the identification effect of different measuring points on the bolt loosening position. The study shows that the eigenfrequencies of experimental results have a consistent trend with the equivalent stiffness variation caused by single bolt missing model. This method also provides a theoretical basis for the detection of bolt deviation position with multi-exciting vibration detection.
Źródło:
Eksploatacja i Niezawodność; 2023, 25, 2; art. no. 165779
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The impact of firm-based organizational citizenship behavior on continuance and normative commitment among pharmaceutical executives: An SEM approach
Autorzy:
Oamen, Theophilus Ehidiamen
Powiązania:
https://bibliotekanauki.pl/articles/2189661.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
organizational citizenship behavior
normative commitment
pharmaceutical industry
structural equation modeling
social exchange theory.
continuance commitment
Opis:
Aim/purpose – The study was based on social exchange theory and addressed the effects of firm-based organizational citizenship behavior (OCB) on normative and continuance organizational commitment (OC). Multigroup behavioral differences among pharmaceutical executives were also evaluated. Design/methodology/approach – This study employed an empirical, explanatory cross-sectional study with online questionnaires administered to four hundred and one randomly selected pharmaceutical executives in Nigeria. The covariance-based structural equation modeling technique was used for testing hypotheses. Firm-based OCB domains –conscientiousness, sportsmanship, and civic virtue were regressed on OC domains of continuance, and normative. The hypothesized effects of firm-based OCB on the domains of OC were examined using Analysis of Moment Structures (AMOS). Findings – The structural model had acceptable fit measures. Conscientiousness and sportsmanship behaviors were negatively related to normative OC while civic virtue had a positive significant relationship with normative OC. Multigroup comparisons based on gender, profession, and type of organization revealed significant effects on the relations between civic virtue and normative OC. Employees highly vested with enhancing and representing their company’s image, tend to be more obligated to continue and remain with the organization. The more self-directed, and less-complaining employees are, the lower the tendency to remain with the organization. The nuances of group differences among employees had an impact on examined relationships. Research implications/limitations – Human resource managers should adequately stimulate and motivate employees to be ambassadors of the organization. This is achievable by instilling a sense of ownership and loyalty in employees. Further implications are discussed. Originality/value/contribution – The study disentangled the relations between OCB and OC in the context of pharmaceutical executives in a developing country. The study highlighted the essence of group-specific differences in behavioral evaluation among pharmaceutical executives.
Źródło:
Journal of Economics and Management; 2023, 45; 47-67
1732-1948
Pojawia się w:
Journal of Economics and Management
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The impact of organizational resilience on the quality of public services: Application of structural equation modeling
Autorzy:
Butkus, Mindaugas
Schiuma, Giovanni
Bartuševičienė, Ilona
Rakauskiene, Ona Grazina
Volodzkiene, Lina
Dargenyte-Kacileviciene, Laura
Powiązania:
https://bibliotekanauki.pl/articles/22400639.pdf
Data publikacji:
2023
Wydawca:
Instytut Badań Gospodarczych
Tematy:
organizational resilience
public service
impact assessment
structural equation modeling
Opis:
Research background: During the COVID-19 pandemic, public sector entities encountered extraordinary difficulties in maintaining the delivery of public services. They were ill-equipped to operate in the unpredictable circumstances of the pandemic, causing a significant impact on the accessibility and quality of public services. This scenario also highlighted the importance of the resilience of the public sector, which entails an organization's capacity to function in a crisis setting and uncover opportunities that might not have been evident during normal circumstances. Purpose of the article: This study aims to assess development trends within public sector resilience and their impact on the quality of public services. As resilience is realized through a three-phase prism - i.e., Planning, Adaptation, and Enhanced Learning - we hypothesize that Adaptation is endogenously interrelated with Planning and positively affects Enhanced Learning, which in turn positively impacts Service Quality. Methods: Two successive surveys were carried out to examine the links between organizational resilience and Service Quality in the public sector. The first involved interviewing 401 senior managers of the organizations that provide public services in Lithuania to assess their level of organizational resilience. The second survey involved questioning individuals aged 18 and above who had used the services of the previously surveyed organizations. In total, 3,609 public service users were interviewed to gather data on Service Quality. Structural equation modeling was performed to analyze the data collected. Findings & value added: The results of structural equation modeling revealed that Enhanced Learning positively and significantly affects Service Quality. The findings of this study suggest that the bounce-back stage of organizational resilience, i.e., Adaptation, indirectly affects Service Quality through the bounce-forward stage, i.e., Enhanced Learning. Thus, Enhanced Learning acts both as an accelerator of Service Quality and as a moderator of the effect that other stages of organizational resilience have on Service Quality. The primary contribution of this article is its discovery that Service Quality develops from Enhanced Learning, implying that the optimal approach to service provision is based on both newly acquired knowledge and experience gained during challenging times. This enables organizations to transform their service delivery in response to the realities of changing circumstances, thereby creating opportunities to prepare for future challenges from the standpoint of a new equilibrium.
Źródło:
Equilibrium. Quarterly Journal of Economics and Economic Policy; 2023, 18, 2; 461-489
1689-765X
2353-3293
Pojawia się w:
Equilibrium. Quarterly Journal of Economics and Economic Policy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Disentangling the impact of ICT adoption on SMEs performance: the mediating roles of corporate social responsibility and innovation
Autorzy:
León-Gómez, Ana
Santos-Jaén, Jose Manuel
Ruiz-Palomo, Daniel
Palacios-Manzano, Mercedes
Powiązania:
https://bibliotekanauki.pl/articles/19322605.pdf
Data publikacji:
2022
Wydawca:
Instytut Badań Gospodarczych
Tematy:
information and communication technologies
ICT
corporate social responsibility
CSR
innovation
firm performance
Partial Least Squares-Structural Equations Modeling-PLS-SEM
Opis:
Research background: The literature on the effects of Information and Communication Technologies (ICT) on performance is extensive and shows a significant positive effect. Likewise, the use of ICT to facilitate and report on Corporate Social Responsibility (CSR) practices implemented by Small and Medium Enterprises (SMEs) contributes to improve business performance. Moreover, through innovative activities, firms also obtain competitive advantages that impact positively on their performance, even more so when they are impacted by CSR. For this reason, it is expected that the adoption of ICTs in companies through a CSR-oriented strategy will increase their impact on business performance.   Purpose of the article: This article tries to examine how ICT affects SMEs' performance through CSR and innovation. Methods: We tested our hypotheses using a sample of 2,825 Spanish SMEs and by applying a Partial Least Squares Path Modeling (PLS-PM) with a double confirmatory and predictive purpose: to identify the causal relationships between latent variables, and to evaluate the ability of the model to make predictions for individual cases. Findings & value added: The results show that CSR-oriented ICT impacts innovation by changing strategies and business model in companies. Moreover, the implementation of CSR practices gave them competitive advantages to increase their performance. We highlight how innovation gives companies greater capacity to respond to changes in their environment and how innovation positively impacts the link between CSR and performance. Finally, our research makes two significant contributions to the literature by incorporating two sequential mediating effects into the model. On the one hand, the indirect effect of ICT on innovation through CSR. On the other hand, the indirect effect of CSR on SME performance through innovation.
Źródło:
Oeconomia Copernicana; 2022, 13, 3; 831-866
2083-1277
Pojawia się w:
Oeconomia Copernicana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Exploring cultural values and sustainability preferences in housing development: A structural equation modeling approach
Autorzy:
Aule, Thomas Terna
Majid, Roshida Binti Abdul
Jusan, Mahmud Bin Moh’d
Powiązania:
https://bibliotekanauki.pl/articles/35561879.pdf
Data publikacji:
2022
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
indigenous housing
cultural values
sustainable development
sustainability preferences
Tiv housing
Opis:
The study aimed to establish the relationship between values and people’s preferences for sustainable improvement in Nigeria’s indigenous housing context. The relationship was tested in SEM using ordinal survey data obtained between February and March 2022 with 241 valid samples. The mainstream values were statistically validated using CFA while the relationships were generated in the SEM. Results established a significant relationship between values and the people’s preferences for transformative improvements. The findings provide a foundation for long-term policy formation, practical transformative experimentation, and an empirical foundation for future methodological research.
Źródło:
Scientific Review Engineering and Environmental Sciences; 2022, 31, 3; 149-160
1732-9353
Pojawia się w:
Scientific Review Engineering and Environmental Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Importance of talent management for information technology personnel in the Thailand’s bureaucratic organization
Znaczenie zarządzania talentami dla kadrów informatycznych w biurowej organizacji Tajlandii
Autorzy:
Tirastittam, Pimploi
Thammaboosadee, Sotarat
Chuckpaiwong, Rojjalak
Powiązania:
https://bibliotekanauki.pl/articles/27315190.pdf
Data publikacji:
2022
Wydawca:
Politechnika Częstochowska
Tematy:
talent management process
talent value proposition
high-performance working systems
structural equation modeling
Thailand
proces zarządzania talentami
propozycja wartości talentów
wysokowydajne systemy pracy
modelowanie równań strukturalnych
Tajlandia
Opis:
The main objective of the present study is to explore the relationship among factors of talent value proposition namely organization branding, talent branding and employer branding, talent management process and high-performance working systems (HPWS). Therefore, the data of the present study was collected from the IT personnel who are employees in the bureaucratic organization of Thailand. The data of this study was collected through questionnaires by using stratified random sampling. The usable response rate was 63.2%. The gathered data was analyzed using structural equation modelling (SEM). The findings of the study point of that TVP factors namely organization branding, talent branding and employer branding play significant role to develop TMP that later impact HPWS. This study also confirms the mediating role of TMP as well. The findings of the present study can be used by the policy makers and practitioners for the practical implementation of talent management practices so the high-performance working systems can be enhanced to increase the employee commitment. This study also discussed the limitations and novelty in detail.
Głównym celem niniejszego opracowania jest zbadanie relacji między czynnikami propozycji wartości talentów, a mianowicie brandingiem organizacji, talent brandingiem i employer brandingiem, procesem zarządzania talentami oraz wysokowydajnymi systemami pracy (HPWS). Dlatego dane do niniejszego badania zostały zebrane od personelu IT, który jest pracownikami biurokratycznej organizacji Tajlandii. Dane z tego badania zostały zebrane za pomocą kwestionariuszy przy użyciu warstwowego doboru losowego. Użyteczny odsetek odpowiedzi wyniósł 63,2%. Zebrane dane zostały przeanalizowane za pomocą modelowania równań strukturalnych (SEM). Wyniki badania wskazują, że czynniki TVP, a mianowicie branding organizacji, branding talentów i branding pracodawcy, odgrywają istotną rolę w rozwoju TMP, które później wpływają na HPWS. Badanie to potwierdza również pośredniczącą rolę TMP. Wnioski z niniejszego badania mogą być wykorzystane przez decydentów i praktyków do praktycznego wdrażania praktyk zarządzania talentami, tak aby można było ulepszyć wysokowydajne systemy pracy w celu zwiększenia zaangażowania pracowników. W badaniu tym szczegółowo omówiono również ograniczenia i nowość.
Źródło:
Polish Journal of Management Studies; 2022, 25, 2; 341--356
2081-7452
Pojawia się w:
Polish Journal of Management Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inclusiveness as a key determinant of work engagement: evidence from V4 countries
Autorzy:
Borisov, Igor
Vinogradov, Szergej
Powiązania:
https://bibliotekanauki.pl/articles/22443128.pdf
Data publikacji:
2022
Wydawca:
Instytut Badań Gospodarczych
Tematy:
empowerment
workplace autonomy
organizational learning environment
structural equation modeling
Opis:
Research background: There is currently a need for empirical research regarding the validity of specific work environment model elements supported by strong statistical evidence. The amount of research conducted in this field has been particularly limited in Central-Eastern Europe. The desire to fill in these gaps was at least in part responsible for the uniqueness of the research approach and its differences from previous similar studies. Purpose of the article: The purpose of this study was to examine factors affecting employee engagement and to examine their relationship with each other using Visegrad countries as an example. Methods: The initial data is taken from the fourth European Company Survey (2019) for management respondents. After data cleaning, the sample sizes for Czechia, Hungary Poland, and Slovakia are N(CZ)=904, N(HU)=682, N(PL)=511, and N(SK)=361, respectively. As a result of the exploratory factor analysis (EFA), the following five dimensions were identified for this research: (1) inclusiveness, (2) empowerment, (3) work autonomy, (4) organizational learning environment, and (5) work engagement. An analysis of structural equation modeling (SEM) was conducted to determine the links that exist among these dimensions of a constructive work environment. Findings & value added: The structural model indicates that inclusiveness and empowerment have a significant positive impact on work engagement in all the countries examined. Inclusiveness was the strongest predictor of work engagement, followed by empowerment. Both of the two other predictors in the model (workplace autonomy and organizational learning environment) generally had less or no effect on employee engagement. The present study extends recent literature on work engagement by empirically validating the influence of workplace environment-related factors, as well as providing useful organizational policy recommendations for managers.
Źródło:
Equilibrium. Quarterly Journal of Economics and Economic Policy; 2022, 17, 4; 1015-1050
1689-765X
2353-3293
Pojawia się w:
Equilibrium. Quarterly Journal of Economics and Economic Policy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Seven Layers of Computation: Methodological Analysis and Mathematical Modeling
Autorzy:
Burgin, Mark
Mikkilineni, Rao
Powiązania:
https://bibliotekanauki.pl/articles/31234166.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Instytut Filozofii i Socjologii PAN
Tematy:
symbol
structure
system
computation
process
symbolic
sub-symbolic
super-symbolic
superstructure
structural machine
Opis:
We live in an information society where the usage, creation, distribution, manipulation, and integration of information is a significant activity. Computations allow us to process information from various sources in various forms and use the derived knowledge in improving efficiency and resilience in our interactions with each other and with our environment. The general theory of information tells us that information to knowledge is as energy is to matter. Energy has the potential to create or modify material structures and information has the potential to create or modify knowledge structures. In this paper, we analyze computations as a vital technological phenomenon of contemporary society which allows us to process and use information. This analysis allows building classifications of computations based on their characteristics and explication of new types of computations. As a result, we extend the existing typologies of computations by delineating novel forms of information representations. While the traditional approach deals only with two dimensions of computation—symbolic and sub-symbolic, here we describe additional dimensions, namely, super-symbolic computation, hybrid computation, fused computation, blended computation, and symbiotic computation.
Źródło:
Filozofia i Nauka; 2022, 10, zeszyt specjalny; 11-31
2300-4711
2545-1936
Pojawia się w:
Filozofia i Nauka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Parents’ Education and Income on Children’s School Performance: the Mediating Role of the Family Environment and Children’s Characteristics, and Gender Differences
Autorzy:
Raudenská,, Petra
Hamplová,, Dana
Powiązania:
https://bibliotekanauki.pl/articles/22792644.pdf
Data publikacji:
2022-06-21
Wydawca:
Polskie Towarzystwo Socjologiczne
Tematy:
school grades
socioeconomic status
educational aspirations
scholarly culture
gender differences
structural modeling
Opis:
This study investigated the effects of family socioeconomic status on children’s academic performance as mediated by their home environment and children’s characteristics, with special attention to gender differences. Structural modeling was applied to a nationally representative Czech Household Panel Survey data (2015/2016). The results revealed that socioeconomic status had no significant direct effects on school performance after controlling for other family aspects. The effects of parental education and income were transmitted by parents’ aspirations for their children, positive parenting, and literacy environment. Home environment, in turn, affected children’s aspirations, general well-being, and interest in books, which directly enhanced children’s school grades. Indeed, children’s characteristics were found to be the strongest predictors of their school performance. The gender analyses showed that the effects of parental characteristics were directly related to boys’ achievement; however, for girls, the effects of parental characteristics operated indirectly through girls’ aspirations, well-being, and interest in books.
Źródło:
Polish Sociological Review; 2022, 218, 2; 247-272
1231-1413
2657-4276
Pojawia się w:
Polish Sociological Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The role of motivation and vocabulary learning strategies in L2 vocabulary knowledge: A structural equation modeling analysis
Autorzy:
Lee, Jang Ho
Ahn, Joung Joo
Lee, Hansol
Powiązania:
https://bibliotekanauki.pl/articles/2143627.pdf
Data publikacji:
2022-09-27
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
motivation
self-regulated learning
vocabulary depth
vocabulary learning strategies
vocabulary size
Opis:
This study explores the complex relationships between language learning motivation, vocabulary learning strategies, and two components of second language vocabulary knowledge (i.e., vocabulary size and depth), within the framework of self-regulated learning. Responses to questionnaires were gathered from 185 secondary-level Korean adolescent learners of English as a foreign language, regarding their motivation and vocabulary learning strategy use; additionally, the results of their vocabulary size and depth tests were collected. We adopted structural equation modeling for analysis, with vocabulary learning strategies consisting of memory, cognitive, and metacognitive categories, and vocabulary knowledge consisting of vocabulary size and depth. The results showed that motivation directly predicted vocabulary learning strategies and vocabulary knowledge, and indirectly predicted vocabulary knowledge via vocabulary learning strategies. When further classified, intrinsic motivation was found to have a stronger influence on the use of vocabulary learning strategies and vocabulary knowledge than extrinsic motivation. We discuss the implications of increasing learners’ motivation and repertoire of strategies for improving vocabulary size and depth.
Źródło:
Studies in Second Language Learning and Teaching; 2022, 12, 3; 435-458
2083-5205
2084-1965
Pojawia się w:
Studies in Second Language Learning and Teaching
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A cross-cultural study of purposive “traits of action”: Measurement invariance of scales based on the action–trait theory of human motivation using exploratory structural equation modeling
Autorzy:
Bernard, Larry C.
Cieciuch, Jan
Lac, Andrew
Žuro, Barbara
Krupić, Dino
Richter, Michael
Silvestrini, Nicolas
von Helversen, Bettina
Powiązania:
https://bibliotekanauki.pl/articles/1879465.pdf
Data publikacji:
2021-08-04
Wydawca:
Uniwersytet Kardynała Stefana Wyszyńskiego w Warszawie
Tematy:
AIM-Q
motivation
motive
evolutionary psychology
personality
Opis:
The Action–Trait theory of human motivation posits that individual differences in predispositional traits of action may account for variance in contemporary purposeful human behavior. Prior research has supported the theory, psychometric properties of scales designed to assess the motive dimensions of the theory, and the utility of these scales to predict an array of behaviors, but this is the first study to evaluate the cross-linguistical invariance of the 15-factor theoretical model. This study evaluated translations of the English language 60-item Quick AIM in 5 samples – Croatian (N = 614), French (N = 246), German (N = 154), Polish (M = 314), and U.S. English (N = 490) – recruited from 4 countries (Croatia, Poland, Switzerland, and the U.S.). Exploratory structural equation modeling (ESEM) supported the theoretical model on which the traits of action are based and scrutinized the measurement invariance (configural, metric, scalar invariance) of the scale across the languages.
Źródło:
Studia Psychologica; 2021, 21, 1; 5-29
1642-2473
Pojawia się w:
Studia Psychologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design optimization for the weight reduction of 2-cylinder reciprocating compressor crankshaft
Autorzy:
Arshad, Ali
Cong, Pengbo
Elsayed Elmenshawy, Adham Ahmed Awad
Blumbergs, Ilmārs
Powiązania:
https://bibliotekanauki.pl/articles/1845022.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
reciprocating compressor
crankshaft optimization
weight reduction
topology optimization
stress
distribution
crank web
lightweight crankshaft design
crack modeling
static structural analysis
modal analysis
sprężarka tłokowa
optymalizacja wału korbowego
redukcja wagi
optymalizacja topologii
naprężenie
dystrybucja
wstęga korby
lekka konstrukcja wału korbowego
modelowanie pęknięć
statyczna analiza konstrukcji
analiza modalna
Opis:
This study aims to optimize the 2-cylinder in-line reciprocating compressor crankshaft. As the crankshaft is considered the "bulkiest" component of the reciprocating compressor, its weight reduction is the focus of current research for improved performance and lower cost. Therefore, achieving a lightweight crankshaft without compromising the mechanical properties is the core objective of this study. Computational analysis for the crankshaft design optimization was performed in the following steps: kinematic analysis, static analysis, fatigue analysis, topology analysis, and dynamic modal analysis. Material retention by employing topology optimization resulted in a significant amount of weight reduction. A weight reduction of approximately 13% of the original crankshaft was achieved. At the same time, design optimization results demonstrate improvement in the mechanical properties due to better stress concentration and distribution on the crankshaft. In addition, material retention would also contribute to the material cost reduction of the crankshaft. The exact 3D model of the optimized crankshaft with complete design features is the main outcome of this research. The optimization and stress analysis methodology developed in this study can be used in broader fields such as reciprocating compressors/engines, structures, piping, and aerospace industries.
Źródło:
Archive of Mechanical Engineering; 2021, LXVIII, 4; 449-471
0004-0738
Pojawia się w:
Archive of Mechanical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effectivity of BIM transfer of structural models between programs for engineers
Efektywność transferu BIM modeli konstrukcji pomiędzy różnymi programami inżynierskimi
Autorzy:
Kotlarz, Oskar
Wosatko, Adam
Powiązania:
https://bibliotekanauki.pl/articles/1955945.pdf
Data publikacji:
2021
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
technologia BIM
transfer danych
interoperacyjność BIM
oprogramowanie inżynierskie
modelowanie konstrukcji
metoda elementów skończonych
BIM technology
data transfer
BIM interoperability
engineering software
structure modeling
finite element method
Opis:
The paper describes the verification of the quality of the data transfer between selected software dedicated to generation of building models and for their analysis using the finite element method. For comparison, models of two typical structures are constructed: a steel truss hall and a multi-storey reinforced concrete building. Both models are created simultaneously in two programs: Autodesk Revit and Tekla Structures. Next, these models are exported to computational packages: Autodesk Robot, Dlubal RFEM and SCIA Engineer. Different options of data transfer are considered, in particular: a direct link between programs as well as via open formats. The scope and limitations of the data exchange are determined in each case. Juxtaposition of the effectiveness of different transfer methods for such typical building models are helpful at the stage of cooperation between the architect and the structural designer. In addition, pilot results of a finite element static analysis for the steel hall model are also compared.
Artykuł opisuje weryfikację jakości transferu danych pomiędzy oprogramowaniem przeznaczonym do tworzenia modeli obiektów budowlanych i ich analizy za pomocą metody elementów skończonych. W celu porównania utworzono modele dwóch typowych konstrukcji, tj. stalowej hali kratownicowej i wielokondygnacyjnego budynku żelbetowego. Oba modele opracowano jednocześnie w dwóch programach: Autodesk Revit i Tekla Structures. Eksport modeli wykonano do pakietów obliczeniowych: Autodesk Robot, Dlubal RFEM i SCIA Engineer. Wybrano różne opcje transferu – poprzez bezpośrednie połączenia programów, ale także poprzez formaty otwarte. W każdym przypadku określono ich zakres i ograniczenia dotyczące wymiany danych. Zestawienia efektywności sposobów różnych metod transferu dla takich typowych modeli budynków pomagają na etapie kooperacji pomiędzy projektantami – architektem i konstruktorem. Dodatkowo porównano również podstawowe wyniki obliczeniowej analizy statycznej dla modelu hali stalowej.
Źródło:
Budownictwo i Architektura; 2021, 20, 3; 5-24
1899-0665
Pojawia się w:
Budownictwo i Architektura
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 81

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