phenomenological

现象学
  • 文章类型: Journal Article
    污名化对患有精神疾病的成年人的影响已得到充分证明。然而,对患有精神疾病的青少年的污名化经历知之甚少。通过对34名被诊断患有精神病的丹麦青少年(14-19岁)的半结构化访谈,这项研究探讨了青少年精神病耻辱的经历。在现象学分析的基础上,我们发现污名化是广泛经历的,精神病通常被认为比共病精神疾病更具污名性。参与者采用不同的策略来管理可能的污名,尤其是(非)披露策略。披露既是治疗性的,也是规范性的,但也有污名化的风险,因此与许多考虑因素有关。在披露时被理解是参与者的核心,缺乏他人的理解是一个持续的挑战。然而,参与者在被他们倾诉的人理解时体验到好处,并且可以在一定程度上通过集中他们对精神病和精神疾病的经历创造理由。我们认为,披露既是一种耻辱管理策略,也是一种规范的必要条件,被理解与否是超越污名定义的挑战。临床试验注册:丹麦卫生和药品管理局:2612-4168。首都地区道德委员会:H-3-2009-123。ClinicalTrials.gov:NCT01119014。丹麦数据保护局:2009-41-3991。
    The impact of stigmatisation on adults with mental illnesses has been thoroughly demonstrated. However, little is known about experiences of stigmatisation among adolescents with mental illness. Through semi-structured interviews with 34 Danish adolescents (14-19 years) diagnosed with psychosis, this study explores adolescents\' experiences of psychosis stigma. On the basis of phenomenological analysis, we find that stigmatisation is widely experienced, and psychosis is generally regarded as more stigmatising than co-morbid mental illnesses. The participants engage in different strategies to manage possible stigma, especially strategies of (non-)disclosure. Disclosure is experienced as both therapeutic and normative, but also bears the risk of stigmatisation, and is therefore associated with numerous considerations. Being understood when disclosing is central to the participants, and lack of understanding from others is a continuous challenge. Nevertheless, participants experience benefits when feeling understood by people they confide in and can to a degree create the grounds for this through centralising aspects of their experiences of psychosis and mental illness. We argue that disclosure is both a stigma management strategy and a normative imperative, and that being understood or not is a challenge transcending stigma definitions.Clinical trial registration: Danish Health and Medicines Authority: 2612-4168. The Ethics Committee of Capital Region: H-3-2009-123. ClinicalTrials.gov: NCT01119014. Danish Data Protection Agency: 2009-41-3991.
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  • 文章类型: Journal Article
    背景:远程医疗具有消除地理和时间障碍的潜力。远程医疗是否以及如何增加服务不足人群的医疗保健机会仍然是一个悬而未决的问题。为了解决这个问题,我们整合了促进的远程医疗相遇,以管理丙型肝炎病毒(HCV),阿片类药物使用障碍(OUD)人群中非常普遍的疾病,阿片类药物治疗计划(OTP)。在纽约州,OTP是美沙酮配药中心,以患者为中心,OUD的循证治疗。我们调查了在这些设置中促进远程医疗与OTP工作流程的整合和影响。
    目的:本研究旨在了解OTP工作人员将便利的远程医疗HCV治疗整合到OTP中的经验,包括最佳实践和经验教训。
    方法:我们对45名OTP工作人员进行了半结构化访谈(13名临床,12行政、6位医生,和14名支持人员)在实施便利的HCV管理远程医疗后至少一年。我们使用诠释学现象学分析来了解OTP员工的经验。
    结果:我们确定了4个总体主题,说明了将便利的远程医疗HCV护理成功整合到OTP中。首先,整合需要对挑战的理解,目标,和OTP的值。随着OTP工作人员了解到新的,高效的HCV疗法,他们认为HCV治愈对患者来说是“胜利”,并对消除高度流行的传染病的潜力感到兴奋。第二,将便利的远程医疗纳入OTP可促进社会支持,并加强患者与OTP工作人员之间的关系.OTP工作人员赞赏在远程医疗接触期间“关注”患者以评估肢体语言的能力,OUD管理的必要组成部分。第三,参与者将高水平的跨专业合作描述为一个护理团队,其中包括为改善患者护理的共同目标而工作的学科之间的界限模糊.研究案例管理人员被整合到OTP工作流程中,并建立了沟通渠道以改善患者预后。第四,管理人员赞同促进远程医疗的持续和未来扩展,以解决合并症。
    结论:OTP工作人员非常热衷于为服务不足的人群提供便利的远程医疗服务。他们描述了与相关综合框架相当的高水平协作和整合。当位于OTP内时,便利的远程医疗是远程医疗的高价值应用,为高质量医疗保健所必需的服务不足的人群提供支持。这些经验支持在可比环境中维持和扩展促进远程医疗,并评估其解决其他合并症的能力。
    背景:ClinicalTrials.govNCT02933970;https://clinicaltrials.gov/study/NCT02933970。
    BACKGROUND: Telemedicine has the potential to remove geographic and temporal obstacles to health care access. Whether and how telemedicine can increase health care access for underserved populations remains an open question. To address this issue, we integrated facilitated telemedicine encounters for the management of hepatitis C virus (HCV), a highly prevalent condition among people with opioid use disorder (OUD), into opioid treatment programs (OTPs). In New York State, OTPs are methadone-dispensing centers that provide patient-centered, evidence-based treatment for OUD. We investigated the integration and impact of facilitated telemedicine into OTP workflows in these settings.
    OBJECTIVE: This study aims to understand OTP staff experiences with integrating facilitated telemedicine for HCV treatment into OTPs, including best practices and lessons learned.
    METHODS: We conducted semistructured interviews with 45 OTP staff members (13 clinical, 12 administrative, 6 physicians, and 14 support staff members) at least one year after the implementation of facilitated telemedicine for HCV management. We used hermeneutic phenomenological analysis to understand OTP staff experiences.
    RESULTS: We identified 4 overarching themes illustrating the successful integration of facilitated telemedicine for HCV care into OTPs. First, integration requires an understanding of the challenges, goals, and values of the OTP. As OTP staff learned about new, highly effective HCV therapies, they valued an HCV cure as a \"win\" for their patients and were excited about the potential to eliminate a highly prevalent infectious disease. Second, the integration of facilitated telemedicine into OTPs fosters social support and reinforces relationships between patients and OTP staff. OTP staff appreciated the ability to have \"eyes on\" patients during telemedicine encounters to assess body language, a necessary component of OUD management. Third, participants described high levels of interprofessional collaboration as a care team that included the blurring of lines between disciplines working toward a common goal of improving patient care. Study case managers were integrated into OTP workflows and established communication channels to improve patient outcomes. Fourth, administrators endorsed the sustained and future expansion of facilitated telemedicine to address comorbidities.
    CONCLUSIONS: OTP staff were highly enthusiastic about facilitated telemedicine for an underserved population. They described high levels of collaboration and integration comparable to relevant integrative frameworks. When situated within OTPs, facilitated telemedicine is a high-value application of telemedicine that provides support for underserved populations necessary for high-quality health care. These experiences support sustaining and scaling facilitated telemedicine in comparable settings and evaluating its ability to address other comorbidities.
    BACKGROUND: ClinicalTrials.gov NCT02933970; https://clinicaltrials.gov/study/NCT02933970.
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  • 文章类型: Journal Article
    背景:学习药物管理对护生至关重要,但第一次可以是压力和塑造他们的临床发展。以前的研究主要集中在学生的知识和技术方面。
    目的:这项现象学研究有助于探索护理学生和教师在临床环境中首次用药期间的生活经历,以更深入地了解他们的想法,感情,和观点。
    方法:对女学生和教职员工进行了半结构化访谈(N=12)。使用现象学研究,数据采用范曼宁解释学六步研究活动法进行分析。
    结果:发现了五个主要主题:用药,(联合国)为临床环境中的复杂性做好准备,变革性的经验,克服恐惧,收获回报。
    结论:首次用药经验大于技能水平的锻炼,如果教师提供更结构化的学习经验,并花费足够的时间让学生准备将药物知识与技能联系起来,则可能会得到改善。技术使用,并支持学生对护患互动的态度。随着护理计划转向基于能力的教育,这些是药物管理学习过程的重要方面。临床教师也需要支持他们作为教育工作者的角色,并促进找到这一次,考虑到他们的多重责任。
    BACKGROUND: Learning medication administration is essential for nursing students, but the first time can be stressful and shape their clinical development. Previous research primarily focused on student knowledge and technical aspects.
    OBJECTIVE: This phenomenological study helped explore the lived experiences of nursing students and faculty during student\'s first medication administration in the clinical setting to gain a deeper understanding of their thoughts, feelings, and perspectives.
    METHODS: Semi-structured interviews were conducted with female student and faculty informants (N = 12). Using a phenomenological study, data were analyzed using van Manen\'s hermeneutic six-step research activity method.
    RESULTS: Five overarching themes were found: administrating medication, (un)preparedness for complexities in the clinical environment, transformative experience, overcoming fears, and reaping the rewards.
    CONCLUSIONS: First-time medication experiences are greater than an exercise in skill proficiency and may be improved if faculty provides more structured learning experiences and take sufficient time for student preparation in relating medication knowledge to the skill, technology usage, and supporting students\' attitudes toward nurse-patient interactions. These are essential aspects of the medication administration learning process as nursing programs shift toward competency-based education. Clinical faculty also need support in their role as educators and to be facilitated to find this time, considering their multiple responsibilities.
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  • 文章类型: Journal Article
    黑腿蜱(IxodescapularisSay)在北美东部构成巨大的公共卫生风险,作为负责传播7种人类病原体的媒介,包括美国最常见的媒介传播疾病,莱姆病.物种分布建模是一种越来越流行的方法,用于预测黑腿蜱的潜在分布和后续风险,然而,到目前为止,这种模型的开发是高度可变的,并且将受益于标准化协议的使用。为了确定标准化协议最有利于当前分配模型的位置,我们完成了“概述”,数据,型号,评估,和预测“(ODMAP)分布建模协议,适用于21种出版物,报告22种黑腿蜱分布模型。我们计算的平均依从性为73.4%(SD±29%)。最突出的是,我们发现,作者可以更好地证明他们对变量的选择和相关的空间尺度与黑腿蜱生态学联系起来。此外,作者可以提供更清晰的模型开发描述,包括多重共线性检查,空间自相关,和合理性。最后,作者可以改进他们对可变效应的报告,以避免破坏模型在告知物种-环境关系方面的效用。为了增强未来模型的严谨性和可重复性,我们建议利用几个资源,包括ODMAP协议,并建议期刊将遵守协议作为出版的先决条件。
    Blacklegged ticks (Ixodes scapularis Say) pose an enormous public health risk in eastern North America as the vector responsible for transmitting 7 human pathogens, including those causing the most common vector-borne disease in the United States, Lyme disease. Species distribution modeling is an increasingly popular method for predicting the potential distribution and subsequent risk of blacklegged ticks, however, the development of such models thus far is highly variable and would benefit from the use of standardized protocols. To identify where standardized protocols would most benefit current distribution models, we completed the \"Overview, Data, Model, Assessment, and Prediction\" (ODMAP) distribution modeling protocol for 21 publications reporting 22 blacklegged tick distribution models. We calculated an average adherence of 73.4% (SD ± 29%). Most prominently, we found that authors could better justify and connect their selection of variables and associated spatial scales to blacklegged tick ecology. In addition, the authors could provide clearer descriptions of model development, including checks for multicollinearity, spatial autocorrelation, and plausibility. Finally, authors could improve their reporting of variable effects to avoid undermining the models\' utility in informing species-environment relationships. To enhance future model rigor and reproducibility, we recommend utilizing several resources including the ODMAP protocol, and suggest that journals make protocol compliance a publication prerequisite.
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  • 文章类型: Journal Article
    将生态韧性理论与现象学认识论相结合,我们探索了体验式,社会,和文化因素在与来自危地马拉2018年Fuego火山爆发摧毁的村庄的参与者之间进行复原力建设。这项研究的目的是找出流离失所的家庭和社区在火山喷发后的生活和建立心理复原力方面采用的策略。我们对Fuego爆发的九名幸存者进行了半结构化的采访,现在搬迁并应对在灾难中丧生的社区和家庭成员的损失。解释性现象学分析用于分析成绩单。分析产生了四个主要主题:(i)个人和集体挑战,(二)社会支持和保护,(三)信仰和文化认可的信仰,(四)展望未来。除了了解更多关于社区如何面对火山喷发带来的挑战,目前的研究有一定程度的可转移性,对理解其他社区如何经历和应对此类事件具有重要意义。
    Combining ecological resilience theory with a phenomenological epistemology, we explored experiential, social, and cultural factors mediating resilience-building with participants from a village destroyed by the 2018 Fuego volcanic eruption in Guatemala. The purpose of the study is to find out what strategies displaced families and communities employ for living through the aftermath of a volcano eruption and for building psychological resilience. We conducted semistructured interviews with nine survivors of the Fuego eruption, now relocated and coping with the loss of community and family members killed in the disaster. Interpretive phenomenological analysis was used to analyze transcripts. The analysis produced four main themes: (i) individual and collective challenges, (ii) social support and protection, (iii) faith and culturally endorsed belief, and (iv) looking to the future. As well as learning more about how a community faced challenges presented by a volcano eruption, the current study has a degree of transferability, with implications for understanding how other communities experience and cope with such events.
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  • 文章类型: Journal Article
    背景:在中低收入国家被诊断患有血液系统恶性肿瘤的患者会承受巨大的生理和心理压力。尽管如此,只有16%的病人在终末阶段得到适当的照顾。因此,了解这一群体的独特经历至关重要。
    目的:通过探索成人晚期血液系统恶性肿瘤患者的观点,更好地了解他们的需求和经历。
    方法:采用定性解释设计,使用现象学方法收集和分析数据。该研究涉及对10名年龄在49至65岁之间的参与者进行深入访谈,利用半结构化方法。
    结果:两个主要的主题从参与者的经历中出现:“疼痛,苦难,和痛苦“和”精神应对。“第一个主题包括身体和情感上的痛苦,痛苦,和痛苦,而第二个主题则集中在参与者的精神应对机制上。这些应对机制包括在宗教活动中寻求安慰,依靠家人和朋友的精神支持,并在他们的信仰和信仰中找到慰藉。
    结论:处于疾病终末期的血液系统恶性肿瘤患者会出现严重的疼痛,相当大的身体和心理痛苦,和精神上的痛苦。虽然他们需要支持来应对他们的日常斗争,他们的经历经常被忽视,导致失望和失去尊严。患者主要依靠他们的灵性来应付他们的情况。医疗保健提供者必须承认这些患者的需求,并提供更全面和有效的护理。
    BACKGROUND: Patients diagnosed with hematological malignancies residing in low-middle-income countries undergo significant physical and psychological stressors. Despite this, only 16% of them receive proper care during the terminal stages. It is therefore crucial to gain insight into the unique experiences of this population.
    OBJECTIVE: To have a better understanding of the needs and experiences of adult patients with advanced hematological malignancy by exploring their perspectives.
    METHODS: A qualitative interpretive design was employed to collect and analyze data using a phenomenological approach. The study involved in-depth interviews with ten participants aged between 49 and 65 years, utilizing a semi-structured approach.
    RESULTS: Two primary themes emerged from the participants\' experiences of reaching the terminal stage of illness: \"Pain, Suffering, and Distress\" and \"Spiritual Coping.\" The first theme encompassed physical and emotional pain, suffering, and distress, while the second theme was centered on the participants\' spiritual coping mechanisms. These coping mechanisms included seeking comfort in religious practices, relying on spiritual support from family and friends, and finding solace in their beliefs and faith.
    CONCLUSIONS: Patients with hematological malignancies in the terminal stages of their disease experience severe pain, considerable physical and psychosocial suffering, and spiritual distress. While they require support to cope with their daily struggles, their experiences often go unnoticed, leading to disappointment and loss of dignity. Patients mainly rely on their spirituality to cope with their situations. Healthcare providers must acknowledge these patients\' needs and provide more holistic and effective care.
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  • 文章类型: Journal Article
    人乳头瘤病毒(HPV)对宫颈患者具有重大的健康风险。在变性人和非二元人中,然而,HPV的检测和治疗可能会带来困难,有时甚至会受到创伤。这项目前的研究是2020年在密歇根州进行的一项更大的混合方法研究的一部分,它探索了跨男性和非二元人群在家中自我擦拭HPV检测试剂盒和HPV传播/筛查知识的经验。现象学方法通过对十个子宫颈的跨男性和非二元个体进行虚拟定性访谈来使用,年龄23-59访谈由研究小组成员独立编码,并使用桌面主题化方法。从数据中产生了四个主题:1)多级障碍;2)“完成它,所以我知道我是安全的\“;3)对比护理偏好;和4)社区呼吁改变。讨论的重点是这些发现对改善变性人和非二元社区的性保健的影响,以及进一步研究的方向。
    The human papillomavirus (HPV) carries a significant health risk for people with a cervix. Among transgender and nonbinary people, however, testing and treatment for HPV can pose difficulties, and even be traumatic at times. This current study is part of a larger mixed methods study conducted in Michigan in 2020, and it explores the experiences of transmasculine and nonbinary people with at-home self-swabbing HPV test kits and knowledge of HPV transmission/screenings. Phenomenological methods were used by conducting virtual qualitative interviews with ten transmasculine and nonbinary individuals with cervixes, ages 23-59. Interviews were independently coded by members of the research team and a tabletop theming method was used. Four themes were generated from the data: 1) Multilevel barriers; 2) \"Get it done, so I know that I am safe\"; 3) Contrasting preferences for care; and 4) Community calls for change. The discussion focuses on the implications of these findings for improving sexual health care for the transgender and nonbinary community, along with directions for further research.
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  • 文章类型: Journal Article
    背景:虽然在COVID-19出现之前就存在虚拟护理服务,但大流行促进了整个加拿大医疗保健系统从当面向虚拟护理服务提供的快速过渡。虚拟护理包括通过视频访问同步或异步提供医疗保健服务,电话访问,或安全消息。患者顾问是具有患者和护理经验的人,他们在医疗保健系统内协作以分享见解和经验,以改善医疗保健。
    目的:本研究旨在了解患者顾问对虚拟护理的看法以及对医疗质量的潜在影响。
    方法:我们采用了现象学方法,因此,我们使用半结构化访谈协议采访了加拿大各地的20名患者顾问。该协议是由内容专家和医学教育研究人员开发的。采访是录音的,逐字转录,并按主题进行分析。一旦达到主题饱和,就停止数据收集。这项研究是在女王大学进行的,金斯顿,安大略省。我们招募了来自加拿大5个省的20名参与者(17名女性参与者和3名男性参与者)。
    结果:确定了六个主题:(1)有效医疗保健的特征,(2)虚拟护理的经验,(3)模态偏好,(4)他人的参与;(5)与虚拟护理遭遇相关的风险,(6)弱势群体。参与者报告说,高质量的医疗保健包括建立关系和全面治疗患者。总的来说,参与者描述了大流行期间虚拟护理的积极经历,包括更高的效率,增加可达性,虚拟护理压力较小,以患者为中心。参与者将虚拟护理与亲自护理进行比较,调度,不同模式的互动内容相似。然而,参与者还认为某些模式更适合特定的临床接触(例如,续开处方和随访预约)。与家庭成员和医学受训者的参与有关的观点是积极的。潜在风险包括沟通不畅,隐私问题,和不准确的患者评估。所有参与者都同意,利益相关者应积极主动地应用策略来支持弱势患者。参与者还建议对患者和提供者进行教育,以改善虚拟护理的提供。
    结论:参与者报告的虚拟护理体验相对积极。未来的工作可以集中在为提供者和患者提供培训和资源。虽然最初的经历是积极的,需要持续的利益相关者参与和评估,以改善患者和护理人员的虚拟护理体验.
    While virtual care services existed prior to the emergence of COVID-19, the pandemic catalyzed a rapid transition from in-person to virtual care service delivery across the Canadian health care system. Virtual care includes synchronous or asynchronous delivery of health care services through video visits, telephone visits, or secure messaging. Patient advisors are people with patient and caregiving experiences who collaborate within the health care system to share insights and experiences in order to improve health care.
    This study aimed to understand patient advisors\' perceptions related to virtual care and potential impacts on health care quality.
    We adopted a phenomenological approach, whereby we interviewed 20 participants who were patient advisors across Canada using a semistructured interview protocol. The protocol was developed by content experts and medical education researchers. The interviews were audio-recorded, transcribed verbatim, and analyzed thematically. Data collection stopped once thematic saturation was reached. The study was conducted at Queen\'s University, Kingston, Ontario. We recruited 20 participants from 5 Canadian provinces (17 female participants and 3 male participants).
    Six themes were identified: (1) characteristics of effective health care, (2) experiences with virtual care, (3) modality preferences, (4) involvement of others, (5) risks associated with virtual care encounters, and (6) vulnerable populations. Participants reported that high-quality health care included building relationships and treating patients holistically. In general, participants described positive experiences with virtual care during the pandemic, including greater efficiency, increased accessibility, and that virtual care was less stressful and more patient centered. Participants comparing virtual care with in-person care reported that time, scheduling, and content of interactions were similar across modalities. However, participants also shared the perception that certain modalities were more appropriate for specific clinical encounters (eg, prescription renewals and follow-up appointments). Perspectives related to the involvement of family members and medical trainees were positive. Potential risks included miscommunication, privacy concerns, and inaccurate patient assessments. All participants agreed that stakeholders should be proactive in applying strategies to support vulnerable patients. Participants also recommended education for patients and providers to improve virtual care delivery.
    Participant-reported experiences of virtual care encounters were relatively positive. Future work could focus on delivering training and resources for providers and patients. While initial experiences are positive, there is a need for ongoing stakeholder engagement and evaluation to improve patient and caregiver experiences with virtual care.
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  • 文章类型: Journal Article
    目的:非正式看护者在履行看护职责的同时,需要支持他们所爱的人。进行了现象学定性研究,以了解中风护理人员可获得的社会支持的作用。
    方法:调查对象来自不同的组织或支持团体,他们专门为中风患者和/或其照顾者开展活动。在采访了10名参与者后,数据收集结束,因为没有发现新的主要主题。因此,以10名受访者为样本,获得了饱和数据.
    结果:从访谈中确定了两个主题:“对中风的反应”和“压力和应对”。主题1“对中风的反应”中的类别是“工作生活平衡”,“其他人或家人对中风的反应”,和“照顾者的期望和责任”。主题二“压力和应对”的类别是“中风对受害者能力的影响”,“照顾者的压力和关注”,“照顾者应对压力的策略”,和“支持小组和社会支持对中风护理者和护理接受者的作用”。
    结论:卒中可导致压力,从而改变卒中患者照顾者的责任。发现社会支持和支持小组的作用对于家庭护理人员应对护理问题至关重要。
    OBJECTIVE: Informal caregivers need to support their loved ones while performing caregiving responsibilities. A phenomenological qualitative study was done to understand the role of social support accessible for stroke caregivers.
    METHODS: The respondents were enrolled from different organizations or support groups who were conducting activities specifically for stroke victims and/or their caregivers. Data collection was concluded after 10 participants were interviewed as no new major themes were discovered. Hence, saturation of data was obtained with a sample of 10 respondents.
    RESULTS: Two themes were identified from the interviews: \"Response to Stroke\" and \"Stress and Coping\". Categories in theme one \"Response to Stroke\" were \"Work Life Balance\", \"Reaction of Other People or Family to Stroke\", and \"Expectations and Responsibility from Caregivers\". Categories in theme two \"Stress and Coping\" were \"Impact of Stroke on Abilities of Victim\", \"Stressors and Concerns for the Caregivers\", \"Strategies used by Caregivers to Cope with Stress\", and \"Role of Support Group and Social Support to Stroke Caregiver and Care Recipient\".
    CONCLUSIONS: Stroke can lead to stress that can alter the responsibilities of caregivers of stroke victims. The role of social support and support groups was found to be critical for family caregivers to cope with caregiving issues.
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  • 文章类型: Journal Article
    随着智能结构在我们的日常生活中变得越来越普遍,对高效建模机电耦合装置的需求也在迅速推进。智能结构通常由压电材料制成,例如锆钛酸铅(PZT),在大电场下表现出强烈的非线性行为,称为滞后效应。已经有许多建模技术能够捕获这种效果;一些技术适用于获得对材料微观结构的物理见解,而其他技术更适合实际的结构分析。在本文中,我们的目标是实现后者。我们提出了非线性铁电执行器的简化现象学宏观模型。该假设基于不可逆应变和不可逆电场之间的直接关系,以及因此产生的不可逆极化。然后在有限元框架中实现所提出的模型,其中导出了局部回波映射和正切模等主要特征。将模型的结果与实验数据进行了比较和验证。因此,本文提出的开发可以成为非线性铁电执行器建模的有用工具。
    As smart structures are becoming increasingly ubiquitous in our daily life, the need for efficient modeling electromechanical coupling devices is also rapidly advancing. Smart structures are often made of piezoelectric materials such as lead zirconate titanate (PZT), which exhibits strong nonlinear behavior known as hysteresis effect under a large applied electric field. There have been numerous modeling techniques that are able to capture such an effect; some techniques are suitable for obtaining physical insights into the micro-structure of the material, while other techniques are better-suited to practical structural analyses. In this paper, we aim to achieve the latter. We propose a simplified phenomenological macroscopic model of a nonlinear ferroelectric actuator. The assumption is based on the direct relation between the irreversible strain and irreversible electric field, and the consequently irreversible polarization. The proposed model is then implemented in a finite element framework, in which the main features such as local return mapping and the tangent moduli are derived. The outcomes of the model are compared and validated with experimental data. Therefore, the development presented in this paper can be a useful tool for the modeling of nonlinear ferroelectric actuators.
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