我想我的多分支管道每40分钟运行一次，我想通过groovy配置作业，这很难做到。下面是我的Groovy代码。

import com.cloudbees.hudson.plugins.folder.*
import com.cloudbees.hudson.plugins.folder.computed.DefaultOrphanedItemStrategy
import com.cloudbees.jenkins.plugins.bitbucket.*
import jenkins.branch.*
import jenkins.plugins.git.*
import jenkins.scm.impl.trait.*
import org.jenkinsci.plugins.workflow.multibranch.*
import jenkins.branch.NoTriggerBranchProperty
import jenkins.branch.NoTriggerMultiBranchQueueDecisionHandler.SuppressionStrategy
import jenkins.branch.DefaultBranchPropertyStrategy
import jenkins.*
import jenkins.model.*
import hudson.*
import hudson.model.*
import hudson.triggers.*

def jobName = "PipelineBuild"
def bitbucketUrl = "https://bitbucket.com"
def credentialIdForBitbucket = "12346790"
def repositoryName = "ApplicationRepo"
def projectOwner = "Loop"
def cronExpression = "H/40 * * * *" // Every 40 minutes

def multibranch = Jenkins.instance.getItemByFullName(jobName, WorkflowMultiBranchProject)
if (!multibranch) {
    multibranch = Jenkins.instance.createProject(WorkflowMultiBranchProject, jobName)
}

def branch = new BitbucketSCMSource(projectOwner, repositoryName)
branch.credentialsId = credentialIdForBitbucket
branch.serverUrl = bitbucketUrl
branch.traits = [
    new BranchDiscoveryTrait(3), // All branches
]

multibranch.getProjectFactory().setScriptPath("ServerApiJenkinsBuild")

branchsource = new BranchSource(branch)
multibranch.setSourcesList([branchsource])
multibranch.setDescription("")
multibranch.setDisplayName(jobName)
multibranch.setOrphanedItemStrategy(new DefaultOrphanedItemStrategy(true, "30", "30"))

def periodicTrigger = new TimerTrigger(cronExpression)
multibranch.addTrigger(periodicTrigger)

multibranch.save()
Jenkins.instance.reload()

Thread.start {
    sleep 3000 // 3 seconds
    multibranch.scheduleBuild()
}

脚本成功运行，但未设置触发器。下面是作业配置

的图片
有什么想法可以实现这一目标吗？