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1.
Considering the shear deformation and thickness stretching of large deformation, a modified numerical calculation method based on the thick shell theory is established to determine the collapse pressure of thick-walled pipes. Verification experiments are conducted on ten pipe specimens in hyperbaric chambers. The good agreement between experimental results and numerical predictions shows the validity and reliability of the new numerical calculation method. Combining DNV specification, the characteristic collapse pressure is also calculated for comparison. The difference between experimental results and DNV calculations illustrates the latter one is much conservative in predicting collapse pressure for thick-walled pipes. Sensitivity analysis on manufacturing imperfections and material properties is investigated for pipes with different D/t ratios. Thick-walled pipes are easier to be affected by initial ovality, residual stress and hardening factor. Based on the stress distribution at the moment of collapse, a novel discovery is found that the collapse pressure of thick-walled pipes is dominated by material plastic behavior. 相似文献
2.
Recent works on organizational adaptation to climate change have repeatedly stressed that – despite concerns about large-scale impacts of climate change on supply chain networks – studies on climate change adaptation in manufacturing industries are still surprisingly scarce. The following study develops a systemic analytical framework based on which climate risks for manufacturing industries are reviewed and drivers (defined as supportive factors) of entrepreneurial robustness are examined. The analysis builds upon a case study in the alpine Austrian state of Tyrol where an intense regional rise of average temperatures occurs, going along with increased risks of natural mountain hazards and exposed settlement structures. In this climate-sensitive setting the authors conducted a survey on risk perceptions among 102 managers from manufacturing firms. Based on a comparison of the sectors metal and engineering, timber products, and construction, the authors argue that drivers of entrepreneurial robustness can be subsumed under five major strategic principles: (a) the deployment of slack resources, (b) vertical supply chain integration, (c) manufacturing flexibility, (d) material efficiency, and (e) technological risk prevention. Departing from the empirical results, the authors argue that across these principles the development of drivers depends on an interplay of structural prerequisites and human decisions on the levels of the focal firm, the supply chain network, and the political, economic, and geographic environment. In this sense, the authors conceptualize different forms of contingencies – thus effects influencing the development of drivers – within an ontology which may support further system-oriented analysis of climate change adaptation in industry. 相似文献
3.
制造集群和专业市场分别由经济活动的生产环节和销售环节在空间上高度集聚形成,两者间互动融合已成为中国沿海地区产业转型升级的新路径。基于共同演化理论分析框架,以辽宁佟二堡镇皮革产业为例,通过实地调研和企业访谈,研究制造集群和专业市场的形成与共同演化过程及其驱动机理,重点考察政府和企业衍生在推动两者共同演化过程中的作用。研究表明,佟二堡镇皮革制造集群与专业市场遵循共生发展型演化模式,呈现出产业规模共同扩大、组织方式共同演进、产业分工共同深化的共同演化过程。东北广阔的消费市场、地方政府的积极推动、制造集群和专业市场内企业衍生是引致两者共同演化的主要原因。 相似文献
4.
Constructing quality: The multinational histories of chocolate 总被引：1，自引：0，他引：1
Geographic research on food quality, while considering many of the ways in which quality is socially constructed, has largely focused on the place-based aspects of the raw materials of food production. Here, we use French convention theory to look at a highly processed food in order to show how place associations in the social construction of food quality extend to manufacturing. For chocolate, quality is based on material characteristics whose relative importance in determining quality depends on the country in which different stages of economic innovation took place. Struggles over the definition of quality chocolate, as exemplified by the “European Chocolate War,” show how quality issues are connected to geographies of manufacturing and innovation. 相似文献
5.
G. J. R. Linge 《The Australian geographer》1991,22(1):67-74
Just‐in‐time (JIT) became a widely used phrase in the 1980s but the ideas underlying it have received little attention from Australian geographers. It is often perceived as simply a system of increasing the efficiency of factories whereas, in reality, it involves changes to systems of firms across a broad range of sectors. This paper explains the meaning of JIT, reviews the literature on this topic in Australia, and suggests that it may return some cohesion to the study of ‘economic geography’ and provide a catalyst for resolving the growing tensions between time and place. 相似文献
6.
This essay provides analyses of labor strikes at two early sites (first quarter of the 20th century) of the global production line – Singer Manufacturing Company’s factories at Clydebank, Scotland and Podolsk, Russia – and the labor management strategies that led to and resulted from these particular enactments of power. I focus on the degree to which Singer and its employees were embedded in local, regional and national contexts, and how and why workers’ agency mattered to the course of early globalization. I also suggest that such analyses provide significant understanding of how and why early global production was both different from and similar to contemporary globalization. By so doing, this analysis contributes to theoretical discussions concerning degrees of territorial embeddedness of transnational corporations, particularly in regard to changes over time as well as geographic scale, and adds historical nuance to theoretical questions concerning labor geographies under conditions of globalization. 相似文献
7.
Universitetslektor dr.scient. Christian Wichmann Matthiessen 《Geografisk tidskrift / udgivet af Bestyrelsen for Det Kongelige danske geografiske selskab》2013,113(1):22-26
Matthiessen. Christian Wichmann: Byerhvervene. Lokaliseringstendenser 1970–83. Geografisk Tidsskrift 87:22–26. København, juni 1987. The Danish pattern of urban employment changed little 1970–83 although dynamic structural changes occurred, and although the total increased 23% to 2,353,366 urban jobs. The manufacturing deconcentration was more than counteracted by growth in no. of tertiary jobs in the large urban places. 相似文献
8.
《Geoforum》2015
Additive manufacturing (or 3D printing) is a comparatively new and evolving form of production that has the potential to transform the geographies of manufacturing. While this technology has garnered significant hype in the popular media, the topic has been virtually ignored in academic circles outside of business- and industry-specific, technology-oriented journals. Given its prospective impacts on the secondary sector and the potential for geographers to explore these transitions, this article provides a discussion of the possible opportunities for theoretical explorations and research into the place-based facets of additive manufacturing and its impacts on, or integration with, traditional manufacturing. In particular, we examine the spatial ramifications of this technology on supply, demand, innovation, global production networks, and the role of the state juxtaposed against contemporary insights pertaining to advances in additive manufacturing. 相似文献
9.
Sam Fankhauser Alex Bowen Raphael Calel Antoine Dechezleprêtre David Grover James Rydge Misato Sato 《Global Environmental Change》2013,23(5):902-913
As the world considers greener forms of economic growth, countries and sectors are beginning to position themselves for the emerging green economy. This paper combines patent data with international trade and output data in order to investigate who the winners of this “green race” might be. The analysis covers 110 manufacturing sectors in eight countries (China, Germany, France, Italy, Japan, South Korea, UK and the US) using date for the period 2005–2007. We identify three success factors for green competitiveness at the sector level: the speed at which sectors convert to green products and processes (measured by green innovation), their ability to gain and maintain market share (measured by existing comparative advantages) and a favourable starting point (measured by current output). We find that the green race is likely to alter the present competitiveness landscape. Many incumbent country-sectors with strong comparative advantages today lag behind in terms of green conversion, suggesting that they could lose their competitive edge. Japan, and to a lesser extent Germany, appear best placed to benefit from the green economy, while other European countries (Italy in particular) could fall behind. However, the green economy is much broader than the few flagship sectors on which the debate tends to focus, and each country has its niches of green competitiveness. 相似文献
10.
To mitigate the effects of climate change, countries worldwide are advancing technologies to reduce greenhouse gas emissions. This paper proposes and measures optimal production resource reallocation using data envelopment analysis. This research attempts to clarify the effect of optimal production resource reallocation on CO2 emissions reduction, focusing on regional and industrial characteristics. We use finance, energy, and CO2 emissions data from 13 industrial sectors in 39 countries from 1995 to 2009. The resulting emissions reduction potential is 2.54 Gt-CO2 in the year 2009, with former communist countries having the largest potential to reduce CO2 emissions in the manufacturing sectors. In particular, basic material industry including chemical and steel sectors has a lot of potential to reduce CO2 emissions. 相似文献